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

Parthenogenesis in larva is called

  1. incomplete parthenogenesis

  2. pedogamy

  3. paedogenesis

  4. syngenesis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When parthenogenesis takes place in larva, it is called paedogenesis.

Multiple choice

The process of terminalisation occurs at _______________________.

  1. pachynema

  2. zygonema

  3. diplonema

  4. leptonema

  5. diakinesis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The chromosomes continue to pull apart, but non-sister chromatids are still loosely associated via the chiasma. The chiasma begins to move toward the ends of the tetrad as separation continues. This process is known as terminalisation. Also during diakinesis, the nuclear envelope breaks down and the spindle fibers begin to interact with the tetrad.

Multiple choice

In hydra, asexual reproduction takes place by ______.

  1. spore formation

  2. fragmentation

  3. budding

  4. binary fission
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydra reproduces asexually through budding, where a small outgrowth (bud) develops on the parent body, detaches, and grows into a new individual.

Multiple choice

In mucor, asexual reproduction takes place by ____.

  1. fragnation

  2. budding

  3. binary fission

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

Mucor is a fungus that reproduces asexually through spore formation (specifically sporangiospores produced in sporangia). Budding and binary fission are seen in yeasts, and fragmentation is another fungal method.

Multiple choice

Bryophyllum reproduces by

  1. leaf buds

  2. sexual reproduction

  3. fission

  4. hermaphroditism

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

Bryophyllum reproduces by leaf buds.

Multiple choice

Which among the following statements does not characterise helminths?

  1. Helminths can be hermaphrodites also.

  2. All helminths produce eggs for reproduction.

  3. Helminth ova have a strong shell.

  4. Helminths deposit eggs at a frequency of thrice a day.

  5. The life cycle of adult worms varies tremendously from one species to another but is generally in the range of 1 to 8 years.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

There is a large variation in the amount of eggs produced by the different worms in one event; this figure varies in the range of 3,000 to 700,000.

Multiple choice

Cryptogams reproduce by means of

  1. pores

  2. spores

  3. discs

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

Cryptogams ('hidden reproduction' plants like algae, fungi, bryophytes, and pteridophytes) reproduce via spores, not seeds. Spores are microscopic reproductive cells that can develop into new organisms without sexual fusion. Seeds are characteristic of phanerogams (seed plants).

Multiple choice

Which of the following characteristics is not of sexual reproduction?

  1. It involves the formation of gametes.

  2. It leads to variations in the offspring.

  3. It produces identical copies of parents.

  4. It promotes diversity of characteristics in the offspring.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexual reproduction involves gamete formation and creates genetic variations through recombination. Producing identical copies is characteristic of asexual reproduction, not sexual reproduction.

Multiple choice

'Bread mould' reproduces by ____________.

  1. spore formation

  2. regeneration

  3. fission

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

Bread mould (Rhizopus) reproduces asexually through spore formation. The fungal hyphae produce sporangia that contain numerous spores. When these spores are released, they can germinate and grow into new organisms under suitable conditions. Regeneration, fission, and budding are not the primary modes of reproduction for Rhizopus.