Biology

Biological Reproduction

762 Questions

Biological reproduction encompasses processes like asexual and sexual reproduction, alternation of generations, and specific mechanisms in plants and fungi. This topic is fundamental for biology paper preparation in various competitive exams. Practice these questions to solidify your understanding.

Asexual reproduction structuresPlant and fungi life cyclesCloning and fertilizationReproductive terminology

Biological Reproduction Questions

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

Basidiospores, Ascospores, Germspores, Meiospores are products of ______ whereas sporangiospores, conidiospore, zoospores are products of _____

  1. Meiosis and Meiosis

  2. Mitosis and Meiosis

  3. Mitosis and Mitosis

  4. Meiosis and Mitosis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
 Mitosis Meiosis 
It is a process where a single cell divided into two identical cells. It is an equational division (i.e no. of chromosomes remains same)  It is a process where a single cell twice to produces four cells containing half the original amount of genetic information. It is a reductional division (i.e.no. of chromosomes reduces to half ).
 It mainly takes place in somatic cells  It takes place in germinal cells or spore mother cells.
 Sporangiospores, conidiospores, zoospores  Basidiospores, Ascospores, Germspores, Meiospores

So, the correct answer is 'Meiosis and Mitosis'.

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

Zoospores are

  1. motile spores seen in bryophytes

  2. motile sexual spores

  3. motile asexual spores in fungi

  4. motile asexual spores in algae and fungi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A zoospore is a motile asexual spore that uses a flagellum for locomotion. Also called a swarm spore, these spores are created by some protists, bacteria, and fungi to propagate themselves.
So the correct answer is "motile asexual spores in algae and fungi".
Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

Meiosis takes place in Chlamydomonas in?

  1. Zygospore

  2. Zoospore

  3. Hypnospores

  4. Aplanospore
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A.zygospore – it is the product of fertilization. It is a diploid structure in the life cycle of Chlamydomonas. It undergoes meiosis and form into a new Chlamydomonas cells.

B.Zoospore – Flagellated, motile structures formed during asexual reproduction in Chlamydomonas is called Zoospore. It is haploid, formed by mitosis.

C.Hyponospore – Thick walled resting spore formed during unfavourable conditions is called Hypnospore.

D.Aplanospore – Aflagellated, non motile spores formed during asexual reproduction is called aplanospore.

So, the correct option is ‘zygospore’.

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

Non - motile, greatly thickened, asexual spore in chlamydomonas is:

  1. Carpospores

  2. Aplanospores

  3. Akinetes

  4. Hypnospores
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Thick-walled non-motile spores formed to tide over unfavorable condition is called  Hypnospores. They germinate on the arrival of favorable conditions. e.g., Chlamydomonas, Ulothrix.

So the correct option is 'Hypnospores'.

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

The motile reproductive structures of algae and fungi, which directly give rise to new individuals are called

  1. Zygospores

  2. Zoospores

  3. Cysts

  4. Conidia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The motile reproductive structures of algae and fungi, which directly give rise to new individuals are called zoospores. It is a asexual motile spore. It uses flagella for locomotion. The zoospores are liberated either by the disintegration of the zoosporangial wall or by the formation of an apical pore on the zoosporangium. After liberation the zoospores swim for a while, then with­draw their flagella, encyst and ulti­mately germinate into new plants.

So, the correct answer is option B.

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

In Chlamydomonas, zoospores are

  1. Laterally flagellated

  2. Pyramid shaped

  3. Exogenously originated

  4. Non- motile asexual spores
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Zoospores of Chlamydomonas are spores that are formed under the unfavorable condition and exhibit asexual reproduction and are able to form a new plant. They use lateral flagella for locomotion.

So the correct option is 'Laterally flagellated'.

Multiple choice zoology asexual reproduction sporulation reproduction in bacteria asexual reproduction in organisms

Asexual reproduction in fungi takes place by

  1. endospore

  2. gametangia

  3. exospores

  4. conidiospore
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Asexual reproduction in fungi takes place by conidia, zoospore, sporangiospores, chlamydospore and oidia.

In some fungi, the spores are not formed inside a sporangium. They are born free on the tips of special branches called conidiophores. This spores thus formed are called conidiophore for example in Penicillium.

So, the correct option is 'conidiospore'.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Karyogamy is?

  1. Fusion of two germ cells

  2. Fusion of two gametic nuclei

  3. Fusion of a somatic cell and a reproductive cell

  4. Fusion of two somatic cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Karyogamy is the final step that is conducting the process of fusing two haploid eukaryotic cells together. It then refers specifically to the fusion of the two nuclei. For its occurrence, the cell membrane and cytoplasm of each cell must fuse by the process termed as plasmogamy. It is a common feature of all diploid organisms undergoing sexual reproduction.

Therefore the correct answer is option B.

Multiple choice evs - i growth and personality development heredity and other supporting factors for development all together community work and its importance

Which of the following terms are defined correctly?

Term Definition
i Heredity The passing on of characteristic from parents to their young.
ii Life cycle The different stages of development of a living thing from a fertilised egg to an adult that can reproduce and die eventually. 
iii Reproduction  The fusion of a sperm and an egg.

  1. i and ii only

  2. i and iii only

  3. ii and iii

  4. i ii and iii
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The passing on of traits from the parents to their offsprings by reproduction (asexual or sexual) is called heredity.
  • The life cycle of an organism can be defined as a sequence of life stages or events an organism undergoes from birth to reproduction.
  • Reproduction is the process by which new organisms or offspring are produced by their parents
  • The fusion of male and female gamete is called fertilization.
  • So, the correct answer is 'i and ii only'.
Multiple choice evs - i growth and personality development heredity and other supporting factors for development all together community work and its importance

Heredity is seen in ______

  1. Sexual reproduction

  2. Asexual reproduction

  3. Vegetative propagation

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transfer of genetic makeup from one generation to another is called heredity. Genes are found on Chormation fibre i.e DNA. All living being have tendency to transfer DNA during sexual or asexual reproductions.

Multiple choice common health problem international health bodies health organisation biology

Which of the following statements are correct?
I. Tapeworms are hermaphrodites and undergo self-fertilization
II. Earthworms are hermaphrodites and undergo self-fertilization.
III.Tapeworms are hermaphrodites but undergo cross-fertilization.
IV.Earthworms are hermaphrodites but undergo cross-fertilization.

  1. I and II

  2. II and III

  3. III and IV

  4. I and IV
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tapeworm and earthworm, both are hermaphrodites but in tapeworms self-fertilization takes place while earthworm undergoes cross fertilization.

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Choose the correct answers from the alternatives given.
In Paramecium, the phenomenon of cyclosis is associated with

  1. digestion

  2. excretion

  3. locomotion

  4. reproduction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cyclosis is the movement in the fluid in the cytoplasm where the proteins and nutrient in the cytoplasm get digested.

So, the correct option is 'digestion'.

Multiple choice zoology earthworm earthworm - reproductive system reproduction in earthworm introduction to reproduction

In earthworms, self fertilization does not occur due to 

  1. Protandry

  2. Protogyny

  3. Both A and B

  4. Dichogamy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earthworms are monoecious or hermaphrodite (have both male and female sex organs) but are protandrous. The testes mature earlier than ovaries and hence, self-fertilisation is avoided.
Thus, the correct answer is option A.

Multiple choice zoology earthworm earthworm - reproductive system reproduction in earthworm introduction to reproduction

Earthworms are hermaphrodite and reproduce primarily by

  1. Self-fertilization

  2. Cross-fertilization

  3. Asexualy

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthworms are hermaphrodites but they cannot fertilize their own eggs because of their relative position of male and female genital aperture and they are protrandous (i.e. male sex mature earlier than female gametes). So, cross-fertilization takes place instead of self-fertilization.

So, the correct option is 'Cross-fertilization'.