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Organisms and Population Top 10 questions NEET/OUAT/ICAR Question 2021 -...

ORGANISM AND POPULATION TOP 10 QUESTIONS - BIOLOGY ADDA BY KAIBALYA

   TOP 10 QUESTIONS ORGANISM AND POPULATION

 1.Carnivarous animal lions and leopards occupy the same niche but lion predate only larger animals and leopard takes smaller one . This mechanism of competition refers to as (ODISHA 2019)-

 a)Character displacement

 b)Altruism

 c)Resource partioning

 d)Competitive exclusion

2.Natality refers to (2018)-

 a)Birth rate

 b)Death rate

 c)Number of individual leaving the habitat

 d)Number of individual entering the habitat

3.Pneumatophores occurs in (2018)-

 a)Halophyte

 b)Free floating hydrophyte

 c)Carnivarous Plant

 d)Submerged hydrophyte

4.Niche is (2018)-

 a)All the biological factor in the organism environment

 b)The physical space where organism lives

 c)The range of temp that organism needs to live

 d)The functional role played by the organism where it lives

5. Between which among the following relationship is not an example of commensalism-

 a)Orchid and the tree which it grows

 b)Cattle egret and grazzing cattle

 c)Sea anemone and clwon fish

 d)Female wasp and fig species 

6.In a growing population of a country -

 a)Pre reproductive individual are more than the reproductive individuals 

 b)Reproductive individual are less than the post reproductive individuals 

 c)Reproductive = pre reproductive

 d)Pre reproductive < Reproductive 

7.Which one of the following plants show a very close relationship with a species of moth where none of the two can complete it's life cycle without the other -

 a)Hydrilla 

 b)Yucca

 c)Banana

 d)Viola

8.Which of the population interaction is widely used in medical science for production of antibiotics -

 a)Commensalism

 b)Mutualism 

 c)Parasitism

 d)Ammensalism 

9.Asymptote in a logistic growth curve is obtained when 

 a)K=N

 b)K>N

 c)K<N

 d)Value of r approches to 0

10.Plant which produce characterstics Pneumatophore and show vivipary belong to -

 a)Halophytes

 b)Psammophytes

 c)Hydrophytes

 d)Mesophytes 

ANSWERS - 

1.C

2.A

3.A

4.D

5.D

6.A

7.B

8.D

9.A

10.A

  

PLANT KINGDOM DPP NCERT BIOLOGY ADDA BY KAIBALYA - NEET/ICAR/OUAT 2021

                                        PLANT KINGDOM DPP

1.Aritificial system of classification was based on -

  a)Vegetative characters

  b)Androecium structure

  c)Habit and habitat

  d)All of these

ANSWER - All of these (D) 

2.__________ system classification system based upon evolutionary relationship.

  a)Natural

  b)Artificial

  c)Phylogenetic

 d)All of the above

ANSWER - Phylogenetic (C)

3.The sporophytic phase in funaria is well developed and composed of - 

  a)Capsule only

  b)Spore sac

  c)Foot and capsule

  d)Foot , seta , capsule

ANSWER - Foot , seta , capsule

4.Peat obtained from sphagnum are used as

 a)fuel

 b)Manure

 c)Corrosive

 d)Both a and b

ANSWER - Both A and B

5.Gametophyte generation is dominant in -

  a)Gymnosperm

  b)Angiosperm

  c)Bryophyte

  d)Pteridophyte

ANSWER - Bryophyte(C)

6.Types of reproduction in volvox

  a)Isogamous

  b)Anisogamous

  c)Oogamous 

  d)All 

ANSWER - Oogamous (C)

7.Phycoerythrin is found in -

  a)Euglena

  b)Polysiphonia

  c)Chlmydomonas 

  d)Fucus

ANSWER - Polysiphonia (B)

8.Haplodiplontic lifecycle is found in -

  a)Bryophyte

  b)Pteridophyte

  c)Fungi

  d)Both a and b

ANSWER - Both a and b (D)

9.Laminarin and mannitol the reserve food of brown algae-

  a)Lipids

  b)Proteins 

  c)Complex carbohydrates

  d)Lipo proteins

ANSWER - Complex carbohydrates (C)

10.Asexual reproduction in liverwort takes place by - 

  a)Fragmentation

  b)Gemme formation

  c)Spore formation

  d)None 

ANSWER - Fragmentation(A)

 KAIBALYA NAYAK . ALL THE BEST.

Human Reproduction DPP on Male reproductive system - Biology Adda by Kaibalya

                                   MALE REPRODUCTIVE SYSTEM 

1.Semen is formed by secretion of - 

  a)Testes and epididymis

  b)Seminal Vesicle and bulbourethral gland

  c)Prostate gland 

  d)All the above

ANS- All the above (D)

2.Sertoli cell is found in -

 a)Uriniferous tubule

 b)Seminiferous tubule

 c)Both A nd B

 d)Rete testes

ANS -  Seniferous tubule (B)

3.Amdrogen is secreted by - 

 a)Ledyg cell

 b)Intestinal cell

 c)Vas deference

 d)Seminiferous tubule

ANS - Ledyg cell (A)

4.Bulbourethral gland is also known as -

 a)Prostrate gland

 b)Cowper's gland

 c)Seminal Vescile

 d)All

ANS - Cowper's Gland(B)

5.In human testes outside the abdominal cavity-

 a)Scrotum

 b)Inguinal Canal

 c)Abdominal sac

 d)Both A and C

ANS - Scrotum (A)

6.Help to nourish sperm-

 a)Sertoli cell

 b)Ledyg cell

 c)Germ cell

 d)All the above

ANS- Sertoli cell(A)

7.Sperms are stored and nourished in - 

 a)Testes

 b)Vasa efferentia

 c)Epididymis

 d)Spermatic Cord

ANS- Epididymis(C)

8.Primary sex organ - 

 a)Penis 

 b)Prostrate

 c)Testes

 d)Scrotum

ANS - Testes(C)

9.Asessory sex organ - 

 a)Breast

 b)Beared

 c)Testes

 d)Vasa deference

ANS - Vasa deference (D)

10.Favourable condition for sperm production -

 a)2 degree celsius

 b)35 degree celsius

 c)37 degree celsius

 d)39 degree celsius

ANS - 35 degree celsius(B)

11.In man two vasa deference opens into-

 a)Urinary Bladder

 b)Rectum

 c)Urethra

 d)Penis 

ANS-Urethra(C)

12.Seminiferous tubules are found in -

 a)Testes

 b)Ovary

 c)Kidney

 d)Lung

ANS- Testes (A)

13.Which cell in the testes secrets binding protein - 

 a)Leydig cell

 b)Germ cell

 c)Sertoli cells

 d)Spermatogonia

ANS - Sertoli cells(C)

14.Which glands secrets alkaline juice for lubrication-

 a)Seminal Vesicle

 b)Prostate Gland

 c)Bulbourethral gland

 d)All 

ANS - Bulbourethral gland(C)

15.The sperms become motile in human being-

 a)Seminiferous Tubule

 b)Vasa Deference

 c)Epididymis

 d)Testes 

ANS - Epididymis (C)

16.Prostrate gland present at -

 a)Penis 

 b)Kidney 

 c)Testes

 d)Urethra

ANS- Urethra(D)

17.Number of Testicular lobes in testes - 

 a)250

 b)300

 c)500

 d)750

ANS- 500(C)

18.The duct that leave the testes and open into epididymis is - 

 a)Vasa efferentia

 b)Vasa deference

 c)Rete testes

 d)Seminal Vescicle

ANS-Vasa efferentia(A)

19.Ejaculatory duct open into -

 a)Ureter

 b)Urethra

 c)Testes

 d)Penis

ANS - Urethra(B)

20.The enlarged end part of penis is called -

 a)Glance Penis

 b)Prepuse

 c)Clitoris

 d)Glans Penis

ANS - Glans penis (D)

Hi this is Kaibalya Nayak . This is the DPP on Human reproduction on the topic Male Reproductive system . I have collected some questions from my Biology educator of Baibhav kumar sir so some  credit goes to him . I will give his unacademy profile link below you may check him. All the best.

👇

https://unacademy.app.link/QnJXxJl4r4

Digestion and absorption DPP part-1 NEET/ICAR/OUAT 2021/22 - BIOLOGY ADDA BY KAIBALYA

         DIGESTION AND ABSORPTION

1)The major component of food are - 

   a)Carbohydrate

   b)Protein

   c)Fats

   d)All the above 

ANS - ALL THE ABOVE (D)

2)In which type of dentition tooth is attached with socket of jaw bone -

   a)Monophyodont

   b)Thecodont

   c)Heterodont

   d)Diphiodont 

ANS - THECODONT (B)

3)The common passage for food and air -

   a)Pharynx

   b)Glottis

   c)Trachea 

   d)Oesophagus

ANS - PHARYNX (A)

4)All of the part of large intestine except -

   a)Caecum

   b)Colon

   c)Rectum

   d)Illeum 

ANS - ILLEUM (D)

5)Oesophagus open into which part of stomach - 

  a)Cardiac 

  b)Pyloric

  c)Fundic

  d)None 

ANS - CARDIAC (A)

6)Contain symbiotic bacteria - 

  a)Cardiac

  b)Pyloric 

  c)Caeccum

  d)Illeum

ANS - CAECCUM (C)

7)Both endocrine and exocrine - 

  a)Liver

  b)Pancreas

  c)Glissons capsule

  d)Gall bladder

ANS - PANCREASE (B)

8)The common hepato pancreatic duct is guard by - 

  a)Pyloric spincter

  b)Spincter of Boydon

  c)Spincter of Oddi

  d)Any of the above

ANS - SPINCTER OF ODDI (C)

9)HCL secreting cell - 

  a)Oxyntic cell

  b)Peptic cell

  c)Chief cell

  d)Mucus neck cell

ANS - OXYNTIC CELL (A)

10)Enzyme enterokinase activates - 

   a)Nucleases

   b)Lipases

   c)Pepsinogen 

   d)Trypsinogen

ANS - TRYPSINOGEN.

HII THIS IS KAIBALYA NAYAK . WELCOME AND THANK YOU FOR YOUR PRESENCE HERE . NEXT PART OF THIS QUESTIONS OF DIGESTION WILL GIVE YOU TOMORROW.

         

              ALL THE BEST  AND THANK YOU

BIOLOGY FULL MOCKTEST - NEET/ICAR/OUAT - BIOLOGY ADDA BY KAIBALYA

1.The infective stage of entamoeba histolytica is -

   a)Trophozoite stage 

   b)Binucleated cyst stage

   c)tetra nucleated cyst stage

   d)None 

ANS-TETRA NUCLEATED CYST STAGE (C)

2.Contractile vacuolein protozoan amoeba is meant for-

  a)Respiration

  b)Excretion

  c)Locomotion

  d)Osmoregulation

ANS - OSMOREGULATION (D)

3.Organism engulf food material , types of nutrition is called - 

  a)Saprozoic 

  b)Autotrophic 

  c)Holozoic 

  d)Saprophytic 

ANS - HOLOZOIC (C)

4.Identify the simple tissue from the following

   a)Parenachyma

   b)Xylem

   c)Phloem

   d) Epidermis

ANS - PARENCHYMA (A)

5.What light ranges is least effective in photosyntheis

  a)Green

  b)Red

  c) Blue 

  d)White

ANS - GREEN (A)

6.Highest rate of respiration - 

   a)Root tip

   b)Leaf bud

   c)Germinating seed

   d)Shoot apex

ANS - GERMINATING SEED(C)

7.GLAND NOT ASSOCIATED WITH ELEMENTARY CANAL -

   a)Pancreas

   b)Adrenal

   c)Liver

   d)Salivary glands

ANS - ADRENAL (B)

8.A large quantity of one of the following is removed from our bodies by lungs - 

   a)Co2

   b)H2o

   c)Co2 and H2o

   d)Ammonia

ANS - CO2

9.Not a disorder of bone - 

   a)Athritis 

   b)Rickets

   c)Osteoporosis

   d)Atherosclerosis

ANS - ATHEROSCLEROSIS (D)

10.Not by contaminated water - 

    a)Hepatitis B 

    b)Cholera

    c)Typhoid 

    d)Jaundice

ANS - HEPATITIS B

 

SMALL DPP ON BIOLOGY NEET/ICAR/OUAT/KCET/BOARDS- BIOLOGY ADDA BY KAIBALYA

                           BIOLOGY DPP ON MIXED SYLLABUS

 1.Mycellium is the name given to the plant body -

   a) Algae

   b)Fungi

   c) Bryophyta

   d)Pteridophyta

ANS - FUNGI

2.Microsporogennesis is a synonym for - 

   a)Spermatogenesis

   b)Development of pollen grain

   c)Development of male gametophyte

   d)Development of female gametophyte 

ANS - DEVELOPMENT OF POLLEN GRAINS(B)

3.Double fertilisation occurs in -

   a)Riccia

   b)Pteridum

   c)Cycas

   d)Capsella

ANS - CAPSELLA (D)

4. Which structure is cut and tied off in vasectomy - 

   a)Penis

   b)Epididymis

   c)Urethra 

   d)Vas deference

ANS - VAS DEFERENS (D)

5.Sexually transmitted disease is also called as -

   a)Veneral disease

   b)Non communicable disease

   c)Congenital disease

   d)None 

ANS - VENERAL DISEASE (A)

6. In angiosperm functional megaspore develops into -

   a)Endosperm

   b)Pollen sac

   c)Embryosac

   d)Ovule

ANS - EMBRYOSAC (C)

7.Megasporaangium is equivalent to 

   a)Fruit

   b)Nucellus 

   c) Ovule 

   d)Embryosac 

ANS - OVULE

8.Implatation takes place after howmany days of fertilisation ?

   a)5

   b)6

   c)7 

   d)8

ANS - 7

9.Howmany linkage group present in the nucleoid of bacteria ?

   a)1

   b)2

   c)3 

   d)4

ANS - 1 

10.Normal Hb level for female-

   a)12 to 16

   b)11 to 14

   c) 13 to 17

   d)None 

ANS - 12 TO 16

Ecological succession ncert NEET Biology Biology Adda by Kaibalya

                                        ECOLOGICAL SUCCESSION 

“Ecological succession is a series of changes that occur in an ecological community over time.”

1. Ecological succession is the steady and gradual change in a species of a given area with respect to the changing environment. It is a predictable change and is an inevitable process of nature as all the biotic components have to keep up with the changes in our environment.

2. The ultimate aim of this process is to reach equilibrium in the ecosystem. The community that achieves this aim is called a climax community. In an attempt to reach this equilibrium, some species increase in number while some other decreases.

3.In an area, the sequence of communities that undergo changes is called sere. Thus, each community that changes is called a seral stage or seral community.

TYPES OF ECOLOGICAL SUCCESSION --

There are following types of ecological succession.

1. Primary succession 

      Primary succession is the succession that starts in lifeless areas such as the regions devoid of soil or  the areas where the soil is unable to sustain life.

When the planet was first formed there was no soil on earth. The earth was only made up of rocks. These rocks were broken down by microorganisms and eroded to form soil. The soil then becomes the foundation of plant life. These plants help in the survival of different animals and progress from primary succession to the climax community.If this primary ecosystem is destroyed, secondary succession takes place.

2.Secondary succession 

Secondary succession occurs when the primary ecosystem gets destroyed. For eg., a climax community gets destroyed by fire. It gets recolonized after the destruction. This is known as secondary ecological succession. Small plants emerge first, followed by larger plants. The tall trees block the sunlight and change the structure of the organisms below the canopy. Finally, the climax community arrives.

3.Cyclic succession

This is only the change in the structure of an ecosystem on a cyclic basis. Some plants remain dormant for the rest of the year and emerge all at once. This drastically changes the structure of an ecosystem.

Seral Community -- “A seral community is an intermediate stage of ecological succession advancing towards the climax community.”

Cause of Ecological succession - The main causes of ecological succession include the biotic and climatic factors that can destroy the populations of an area. Wind, fire, soil erosion and natural disasters include the climatic factors.

Importance - 

Ecological succession is important for the growth and development of an ecosystem.

 It initiates colonization of new areas and recolonization of the areas that had been destroyed due to certain biotic and climatic factors.

Thus, the organisms can adapt to the changes and learn to survive in a changing environment.

HII THIS IS KAIBALYA FROM BIOLOGY ADDA BY KAIBALYA SHARED SOME INFORMATION RELATED TO ECOLOGICAL SUCCESSION WHICH IS IMPORTANT IN EXAMS . GOOD LUCK . JAY JAGANNATH.

Phosphorus Cycle - 12 th class , NCERT , ECOSYSTEM , BOARDS , NEET - Biology adda by kaibalya

               

              Phosphorus cycle

       Phosphorus is found in nature , in soil , as rock phosphate , in combination with calcium , iron and aluminium. It is the significant part of DNA , RNA and ATP . Human contain 80 percent of phosphorus in teeth and bones.

It is a very slow process.  Various weather processes help to wash the phosphorus present in the rocks into the soil . Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes. It is a solid cycle and atomosphere does not play role in this cycle.

STEPS OF PHOSPHORUS CYCLE

Following are the important steps of phosphorus cycle:

1. Weathering
2. Absorption by Plants
3. Absorption by Animals
4. Return to the Environment through Decomposition 

1. 

WEATHERING - 

Phosphorus is found in the rocks in abundance. That is why the phosphorus cycle starts in the earth’s crust. The phosphate salts are broken down from the rocks. These salts are washed away into the ground where they mix in the soil.

ADSORPTION BY PLANT -

The phosphate salts dissolved in water are absorbed by the plants. However, the amount of phosphorus present in the soil is very less. That is why the farmers apply phosphate fertilizers on agricultural land.

The aquatic plants absorb inorganic phosphorus from lower layers of water bodies. Since phosphate salts do not dissolve in water properly, they affect plant growth in aquatic ecosystem.

ABSORPTION BY ANIMAL - 

The animals absorb phosphorus from the plants or by consuming plant-eating animals. The rate of the phosphorus cycle is faster in plants and animals when compared to rocks.

RETURN OF PHOSPHORUS THROUGH DECOMPOSITION-

When the plants and animals die they are decomposed by microorganisms During this process, the organic form of phosphorus is converted into the inorganic form, which is recycled to soil and water.

Soil and water will end up in sediments and rocks, which will again release phosphorus by weathering. Thus, the phosphorus cycle starts over.

HUMAN IMPACT ON PHOSPHORUS CYCLE

A number of human activities, use of fertilizers, artificial eutrophication, etc. has a great impact on the phosphorus cycle.

The phosphorus fertilizers increase the level of phosphorus in the soil. Overuse of these fertilizers reduces the fertility of the soil and is also harmful to the microorganisms present in the soil. When these are washed away into the nearby water bodies, they are hazardous to aquatic life.

During the shipping of food from farms to cities, the amount of phosphorus that is washed away in water causes eutrophication. This leads to the growth of algae. These form algal blooms or die, which is toxic to the aquatic ecosystem.

                Hii this is Kaibalya Nayak from from Biology adda by Kaibalya shared Phosphorus cycle which is important for various exams . Good luck have a nice day . Jay Jagannath. Do share with your friends.

Mixed bag Biology DPP for NEET , ICAR , OUAT , KCET

Hii this is Kaibalya Nayak from Biology Adda by Kaibalya , going to share some mixed bag Biology questions which will be helpful for NEET , ICAR , OUAT , KCET and manymore state level exams.

 Q1. Sickle cell anaemia is most resistant to

        a: Malaria

        b: Filaria

        c: Dengue

        d: Chicken pox

Answer: Malaria (A)

Q2. Which of the following ecosystem has very little primary productivity

       a: Forest

       b: River

       c: Sea

       d: Grassland

Answer: River (B)

Q3. Poikilotherms are also known as

       a: Isotherm

       b: Ectotherm

       c: Endotherm

       d: Heterotherm

Answer: Ectotherm (B)

Q4. Casparian strips are present in the ________ of the root.

       a: epiblema

       b: cortex

       c: perycycle

       d: endodermis

Answer: Endodermis (D)

Q5. BT brinjal is an example of transgenic crops. In this, BT refers to

      a: Bacillus tuberculosis

      b: Biotechnology

      c: Betacarotene

      d: Bacillus thuringiensis

Answer: Bacillus thuringiensis (D)

Q6. Which one of the following is NOT a method of soil conservation?

       a: Overgrazing

       b: Mulching

       c: Strip cropping

       d: Crop rotation

Answer: Overgrazing (D)

Q7. ___________ is a gaseous plant hormone

      a: IBA

      b: Ethylene

      c: Abscisic acid

      d: NAA

Answer: Ethylene (B)

Q8. The leaf defoliator utilized in the Vietnam war by the USA known as “Agent Orange” was

       a: 2,4, -D and 2,4,5 – T

       b: Ethylene

       c: 2,4, -D and NAA

       d: 2,4,5 – T, ethylene and NAA

Answer: 2,4 D and 2,4,5 T (A)

Q9.‘New Systematics’ term was coined by

       a: Linnaeus

       b: Bentham and Hooker

       c: A.P. de Candolle

       d: Juliane Huxley

Answer: Juliane Huxley (D)

Q10. Nature of honey is

         a: Acidic

         b: Alkaline

         c: Neutral

         d: Turns basic after a few days

Answer: Acidic (A)

Q11. Which of the following is not true about hydroponics?

         a: Requires high investment

         b: Technical knowledge required

         c: Can be misused to cultivate banned crops

         d: Plants through hydroponics cannot be cultivated everywhere

Answer: Plant through hydroponics cannot be cultivated everywhere (D)

Q12. Mitochondria is the site for

        a: Calvin cycle

        b: Kreb's cycle

        c: Hill reaction

        d: Glycolysis

Answer: Kreb's Cycle (B)

Q13. Which of the following would be in insignificant amount in xylem sap?

        a: Nitrates

        b: Phosphates

        c: Water

        d: Sugar

Answer: Sugar (D)

Q14. Name the following having oxygen storing capacity

         a: Myoglobin

         b: Prophase II

         c: Anaphase I

         d: Metaphase II

Answer: Myoglobin (A)

Q15. Nosema bombycis which causes pebrine in silk worms is a

        a: Bacterium

        b: Virus

        c: Protozoan

        d: Fungus

Answer: Protozoan (C)

All the Best . Jay Jagannath.

Link of another DPPhttps://biologyaddabykaibalya.blogspot.com/2020/10/important-full-syllabus-biology-dpp-for.html?m=1

Important full syllabus Biology DPP for NEET/OUAT/ICAR/other exams 2021

                                  Hii this is Kaibalya Nayak from Biology adda by Kaibalya going to share an important DPP contains 20 biology questions which is important for NEET , ICAR , OUAT , KCET and many exams . All the best . Do share this with your friends.

Q1. Mitotic stages are not observed in ________.

      a: Cosmarium 

      b: E.coli

      c: Saccharomyces

      d: Chlorella

Answer: E coli( B)

Q2. Mannitol is

      a: Amino Acid

      b: Amino alcohol

      c: Sugar alcohol

      d: Sugar acid

Answer : Sugar Alcohol (C)

Q3. Example of water soluble plant pigment is

      a: Chlorophyll-a

      b: Chlorophyll-b

      c: Anthocyanin

      d: Xanthophyll

Answer : Anthocyanin (C)

Q4. Banana bunchytop virus is transmitted through

       a: Pentalonia nigronervosa

       b: Aedes aegypti

       c: Culex sp

       d: Agribacterium sp

Answer : Pentalonia bunchytop (A)

Q5. According to Darwin, evolution is _______.

       a: a slow, gradual and continuous process.

       b: a sudden but discontinuous process.

       c: a slow and discontinuous process.

       d: a slow, sudden and discontinuous process.

Answer : a slow , gradual and continuous process(A)

Q6. Sporopollenin, a chemical substance is found in _______.

      a: Exine of pollen grain

      b: Intine of pollen grain

      c: Tapetum of anther

      d: Endothecium of anther

Answer : Exine of pollen grain (A)

Q7. Vessels and tracheids are absent in _______.

      a: Equisetum

      b: cycas

      c: Gnetum

      d: Marsilea

Answer: Cycas (B)

Q8. Classification given by Bentham and Hooker is

       a: Artificial

       b: Natural

       c: Phylogenetic

       d: Numerical

Answer: Natural (B)

Q9. Which of the following responsible for the mechanical support , protein synthesis and enzyme transport

      a: Cell membrane

      b: Mitochondria

      c: Centriole

      d: ER

Answer: ER (D)

Q10. Wharton's duct is the duct of

         a: Sub mandibular salivary gland

         b: Parotid gland

         c: Submaxillary gland

         d: All of these

Answer: Sub mandibular salivary gland (A)

Q11. Exchange of gases in alveoli ofl ungs takes place through

        a: Osmosis

        b: Simple diffusion

        c: Active transport

        d: Passive transport

Answer: Simple Diffusion (B)

Q12.Glucose and amino acids are reabsorbed in the

       a: PCT

       b: DCT

       c: Collecting duct

       d: Loop of henle

Answer: PCT (A)

Q13. Bowman's gland are located in

       a: Anterior pituitary

       b: Female reproductive system of cockroach

       c: Olfactory epithelium of our nose

       d: Proximal end of uriniferous tubule

Answer: Olfactory epithelium of our nose (C)

Q14. Diabetes insipidus occurs due to hyposecretion of

       a: Thymosine

       b: Oxytocin

       c: Insulin

       d: Vasopressin

Answer: Vasopressin (D)

Q15. Which type of selection is industrial melanism observed in moth

       a: Stabilizing

       b: Directional

       c: Disruptive

       d: Artificial

Answer : Direction (B)

Q16. Darwin's finches are found in

       a: Galapagos Island

       b: Tahiti

       c: Tundra

       d: None of these

Answer: Galapagous island (A)

Q17. In malignant tumors cells proliferate , grow rapidly and move to other parts of body to form tumors. This stage is called

      a: Metagenesis

      b: Metastasis

      c: Teratogenesis

      d: Mitosis

Answer: Metastasis (B)

Q18. The term Totipotency refers to capacity of a

       a: Cell to generate whole plant

       b: Seed to germinate

       c: Bud to generate whole plant

       d: Cell to enlarge in size

Answer:  Cell to generate whole plant (A)

Q19. A population has more young individuals than old , so what would be the status of population after some years

      a: It will decline

      b: It will stabilize

      c: It will increase

      d: It will first decline then stabilize

Answer: It will increase (C)

Q20. Many freshwater animals cannot live for long in sea water and vice versa because of

       a: Change in N level

       b: Change in level of thermal tolerance

       c: Variation in light intensity

       d: Osmotic problems

Answer: Osmotic problems (D)

HAVE A NICE DAY. JAY JAGANNATH.

PLANT KINGDOM NCERT EXEMPLAR 11TH CLASS BIOLOGY ADDA BY KAIBALYA

                        Hii, this is Kaibalya Nayak from Biology Adda by Kaibalya , going to share mcq of ncert exemplar Plant kingdom 11th class chapter which is important for exams like NEET, ICAR , BOARDS, STATE CET etc. Let's start the topic.

1.Cyanobacteria are classified under

   A)Monera

   B)Plantae

   C)Protista

   D)Algae

Ans -  A)Monera

2.Fusion of 2 motile gamets which are dissimilar in size is termed as -

A)Oogamy

B)isogamous

C)Anisogamous

D)Zoogamy

Ans - C)Anisogamous

3.Holdfast,stipe and frond constitute the plant body in case of 

A)Rhodophyceae

B)Chlorophyceae

C)Phaeophyceae

D)All

Ans - C)Phaeophyceae

4.A plant shows thallus level of organisation. It shows rhizoids and is halploid . It needs water to complete it's life cycle beacause male gamets are motile. It may belong to-

A)Pteridophyte

B)Gymnosperm

C)Monocots

D)Bryophyte

Ans - D)Bryophyte

5. A prothallus is -

A) a structure in pteridophyte formed before the thallus develop

B)A sporophytic free living structure formed in pteridophyte

C)A gametophyte free living structure formed in pteridophyte

D)A primitive structure formed after fertilization in pteridophytes

Ans - C)A gametophyte free living structure formed in pteridophyte

6.Plants of this group are diploid and well adapted to extreme conditions. 

they grow bearing sporophylls in compact structure called cones. the group in reference is -

A)Monocots

B)Dicots 

C)Pteridophyte

D)Gymnosperm

Ans - D)Gymnosperm

7. The embryo sac of an angiosperm is made up of 

A)8 cells

B)7 cells 8 nuclei

C)8 nuclei

D)7 cells 7 nuclei

Ans - B)7 cells 8 nuclei

8. If the diploid number of a flowering plant is 36. What would be the chromosome number in its endosperm?

A)36

B)18

C)54

D)72

Ans - 54

9. Protonema is -

A) Halploid , found in mosses

B)Halploid , found in pteridophyte 

C)Diploid , found in pteridophyte

D)diploid found in liverwort

Ans - A) Halploid , found in mosses

10. The giant redwood tree (sequoia sempervirens) is a-

A)angiosperm

B)Free fern 

C)Pteridophyte

D)Gymnosperms

Ans - D)Gymnosperms

GOOD LUCK. HAVE A NICE DAY😇

Reproduction in Organism 12 th class biology DPP Biology Adda by Kaibalya

 Hii this is Kaibalya Nayak from Biology Adda by Kaibalya going to discuss some DPP with you on this chapter it includes Previous year questions and important question from different books. Let's Go . All the best.

1. Isogamous condition with nonflagelleted gametes is found in -

     (a) Volvox

     (b)Spirogyara

     (c)Fucus

     (d)All of the above

Ans - answer is B it's spirogyara produce non-flagelleted gamets but similar in size.

2. In Ginger vegetative propagation occurs through 

    (a)Runner

    (b) Rhizome

    (c)offset

   (d) Bulbils

Ans - Answer is B . Rhizome is underground perennial stem buds present the notes take part in formation of new ariel shoot.

3. Sexual reproduction generally produces- 

   (a) Parthenocarpy

   (b)New genetic variation 

   (c)Larger  biomas

   (d)Longer viability of seeds

Ans - Answer is b . New genetic variation.

4.Correctly matched

    (a)chlmydomonas   -    conidia

    (b)Yeast  -   Zoospores

    (c) Onion - Bulb 

    (d)Ginger  - Rhizome

Ans - Ans is C . Onion and Bulb is correctly matched.

5.No natural death in single celled organisms 

   (a)cant reproduce sexually

   (b)reproduce by binary fission

   (c)parent body is distributed among offsprings

   (d)They are microscopic

ans -  (c)parent body is distributed among offsprings

6._______ species flowers only once in life time.

   (a)Bamboo species

   (b)Jackfruit

  (c)Papaya

  (d)apple

Ans - (a)Bamboo species

7. Female gametes develops into an embryo without fertilisation this is called

     (a)Autogamy

     (b)Triple fusion

     (c)Syngamy

    (d)Parthenogenesis

ans -  (d)Parthenogenesis

8. The number of chromosomes in shoot tip cell of a zea mays is 20. The number of chromosomes in the microspore mother cell of the same plant shall be

    (a)20

    (b)10

    (c)15

    (d)40

Ans -  (a)20

9.Types of reproductiondepends upon

    (a)Habitat

    (b)physiology

    (c)Genetic makeup

    (d)All the above

Ans -   (d)All the above

10. Banana reproduce by 

     (a)Rhizome

    (b)offset

    (c) conidia

    (d)All

Ans - (a)Rhizome

                 

            Enjoy this questiom another part will be released soon. Good Luck