Biology

Biological Reproduction

806 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 evs super senses sleeping time animal senses sense organs in animals

Which of the following is called as aestivation?

  1. Sleeping in winters

  2. Sleeping in summer

  3. Sleeping in Autumn

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aestivation is a state of prolonged sleep during summer, exhibited by certain animals in response to high temperature and arid conditions. Example - frogs and toads, bees, salamander etc.

Multiple choice reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

Upon observing the slides showing stages of reproduction in Yeast and Amoeba .The correct observation are that of student(s)
students, I, II, III and IV, reported their observations as given below :
I.  Cytokinesis was seen in the Yeast cell.
II.  A chain of buds was seen due to reproduction in Amoeba.
III.  Elongated nucleus was dividing to form two daughter nuclei in Amoeba.
IV.  Single cells of Amoeba and yeast were undergoing binary fission and budding respectively.

  1. I and II

  2. II only

  3. III and IV

  4. I, III and IV
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yeast reproduces by budding, where a small bud forms and eventually detaches, while Amoeba reproduces by binary fission, where the nucleus divides followed by cytokinesis. Statement III correctly describes the nuclear division in Amoeba, and IV correctly identifies the respective modes of reproduction.

Multiple choice reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

Organism produced by asexual reproduction are called

  1. clones

  2. offsprings

  3. factors

  4. both (A) and (B)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Since the organisms produced by asexual reproduction are completely identical to the parents due to no variation, they are called clones.

So, the correct option is  'clones'.

Multiple choice reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

A 'clone' is defined as a collection of genetically _________________.

  1. Different individuals produced by sexual reproduction

  2. Different individuals by vegetative reproduction

  3. Identical individuals by sexual reproduction

  4. Identical individuals by vegetative reproduction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A clone is scientifically defined as a group of genetically identical individuals derived from a single common ancestor, typically produced through asexual or vegetative reproduction methods.

Multiple choice reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

Assertion: Clones are produced by sexual reproduction and same sexual process.

Reason: These are prepared by group of cells descended from many cells or by inbreeding of a heterozygous line

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Clones are asexually produced. These have same genotype and phenotype like parent.

So, the correct answer is 'If both the assertion and reason are false'

Multiple choice reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

The phenomenon observed in some plants where in parts of the sexual apparatus is used for forming embryos without fertilisation is called.

  1. Parthenocarpy

  2. Apomixis

  3. Vegetative propagation

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

Apomixis is the term given to any phenomenon that leads to formation of embryo wherein parts of the sexual apparatus are used, but without fertilisation. Fertilisation is also absent in vegetative propagation, but parts of sexual apparatus are not involved. An example of apomixis is Citrus.

Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

In lichens, sexual reproduction is usually performed by

  1. Algal partner only

  2. Fungal partner only

  3. Both algal and fungal partner only

  4. Either of the two partners
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lichens exhibit the symbiotic association between algae and fungi. In this plant, algae is the photosynthetic partner involved in food preparation and the fungal partner increases the surface area for the absorption of water and minerals. Also, the fungal partner is involved in sexual reproduction with the help of reproductive structures called apothecia. 

Thus, the correct answer is option B. 

Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

During unfavourable conditions slime molds form spores which are survival for a long time, spore dispersal take place by

  1. Water currents

  2. Air currents

  3. Insects

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Slime moulds are Saprophytic Protists.
  • They move along decaying twigs and leaves engulfing organic material. 
  • Under a suitable condition, they form aggregation called Plasmodium.
  • During unfavourable condition, the plasmodium differentiates and form fruiting bodies bearing spores at their tips.
  • The spores possess true walls.
  • They are extremely resistant and survive for many years even under adverse conditions. 
  • The spores are dispersed by air currents.
  • So, the correct answer is 'Air currents'.
Multiple choice biology reproductive health stds and infertility gm crops biotechnology

Bull semen for the purpose of artificial insemination is stored in 

  1. Ice

  2. Liquid oxygen

  3. Liquid nitrogen
  4. Liquid CO$ _2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Artificial insemination is a globally accepted method of breeding cattle and is also effective for other species. Semen can be stored deep-frozen in liquid nitrogen, in a chilled liquid form or at room temperature. Its low temperature of $-196^0$C and inert caracteristics prevent the deterioration of biological quality. Hence, option C is correct.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Heteromorphic alternation of generations occurs in

  1. Dictyota

  2. Selaginella

  3. Rhizopus

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

Heteromorphic alternation of generations refers to a life cycle where the sporophyte and gametophyte phases are morphologically distinct, which is characteristic of Selaginella.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which of the following division of kingdom plantae and sub-kingdom cryptogamae can reproduce sexually by formation of gametes.

  1. Thallophyta

  2. Bryophyta

  3. Pteridophyta

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

Pteridophyta is the only division of sub-kingdom cryptogamae that can reproduce both, sexually by formation of spores as well as sexually by formation of gametes.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

What is the mode of reproduction in Pteridophyta?

  1. Asexually by spores

  2. Sexually by formation of gametes

  3. Both A and B

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pteridophyta are multicellular, autotrophic plants, they can reproduce asexually as well as sexually. They reproduce asexually by formation of spores and sexually by the formation of gametes.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

External water is not required for fertilization in

  1. Fern/Selaginella

  2. Moss/Riccia

  3. Ulothrix

  4. Gymnosperms/Maize
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms and angiosperms (like maize) are seed plants that use pollen tubes for fertilization, meaning they do not require external water for the sperm to reach the egg.

Multiple choice examples of bryophytes plant kingdom biology

In which among the following plants archegonium is present?

  1. Spirogyra

  2. Funaria

  3. Rhizopus

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

Archegonia are the female sex organs found in bryophytes, pteridophytes, and gymnosperms. Among the choices, Funaria is a bryophyte.