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 plant kingdom biology

Motile sperms are absent in _______________.

  1. Rhizopus

  2. Funaria

  3. Fern

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

Motile sperms are absent in Rhizopus. In Rhizopus, gametangial copulation takes place. The terminal part of sub aerial hyphae acts as coenogametes which fuse to form a diploid zygote and then a resting spore called as zygospore. It contains several diploid nuclei with reserve material. It undergoes meiosis to form spores which on germination give rise to new mycelium.

Therefore, the correct answer is option A.

Multiple choice plant kingdom biology

Consider the following statements.
a. Ectocaipus has an alternation of isomorphic generations
b. Fucus has no free living haploid generation
c. All red algae are multicellular organisms
d. Brown algae have a few unicellular species
Which of these statements are correct?

  1. $1, 2, 3$ and $4$
  2. $2, 3$ and $4$
  3. $1, 3$ and $4$
  4. $1$ and $2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All four statements are correct: Ectocarpus shows isomorphic alternation of generations, Fucus is diplontic (no free-living haploid generation), red algae are multicellular, and some brown algae (like some species of Ectocarpus) are unicellular.

Multiple choice biology concept of life living organism living vs nonliving living vs non living

Generally growth and reproduction are

  1. Mutually inclusive events

  2. Mutually exclusive events

  3. Either a or b

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Increase in the size of an organ or body is called growth, whereas the formation of progeny from a parent is called reproduction. So in a living organism growth and reproduction simultaneously occur.

So, the correct answer is ‘Mutually inclusive events ’.

Multiple choice biology division for growth and reproduction reproductive systems different stages of growth reproductive system in humans human system

The events in sexual reproduction are
(i) pre-fertilisation
(ii) fertilisation
(iii) post-fertilisation
The sequential order of their occurence is

  1. (ii) - (i) - (i)

  2. (ii) - (ii) - (i)

  3. (i) - (ii) - (iii)

  4. (i) - (iii) - (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In spite of their morphological, anatomical and physiological differences, the fundamental events in sexual reproduction are the same. These events can be categorized as follows:

1. Pre-fertilization events: All the preparatory events which occur before the fusion of gametes are called pre-fertilization events. These include Gametogenesis and gamete transfer.
2. Fertilization: Fusion of two entire gametes ( one male and another female) to form a zygote.
3. Post-fertilization: All the events that occur during sexual reproduction after the fusion of gametes are called post-fertilization events.
So, the correct answer is '(i)-(ii)- (iii)'.

Multiple choice biology ecology classification hierarchy hierarchy of classification different types of classifications

Which one of the following statements regarding Pomato is correct?

  1. It is a product of somatic hybridization

  2. It is obtained by gene manipulation

  3. It is a natural hybrid product of sexual reproduction

  4. It is the fusion product of archegonia and antheridia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pomato is a somatic hybrid produced by the fusion of protoplasts of potato and tomato, which is a technique of somatic hybridization.

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

If a starfish is cut into pieces, each piece grow into a complete animal. The process is called-

  1. Regeneration

  2. Reproduction

  3. Healing of wounds

  4. Growth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The Starfish or Sea Stars (viz. Asterias, Linckia, Asterina, etc.) are free-living marine Echinoderm animals. They are found in sandy or muddy sea bottoms, or over the rocks, and shells. Some species of Sea Stars have a great power of Regeneration. By this method, they can re-grow an amputated limb or some other body parts. When any arm of a Starfish gets injured, the animal casts off its own arm - a process called Autotomy. Then by the process of Regeneration, the Starfish can re-grow a completely new perfect arm in the place of the injured one. Even, in some Sea Star (viz. Linckia), an arm can even regenerate a complete animal.
Multiple choice biology reproduction in animals story of dolly, the clone sheep story of dolly, the clone process of cloning

The following are the events in the formation of the first cloned animal the sheep Dolly.
a) Removal of haploid nucleus from the ovum.
b) Implantation of ovum with diploid nucleus into the surrogate mother.
c) Collection of udder cell from the sheep.
d) Injection of diploid nucleus of udder cell into the enucleated ovum.
e) Development of a young clone.The correct sequential order of these events is ________

  1. abcde

  2. cabed

  3. cadbe

  4. edcba
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice evs seed becomes plant introduction to reproduction vegetative reproduction budding, vegetative propagation and spore formation other modes of vegetative propagation the journey of seeds

Clone is

  1. Descendants of a single parent

  2. Vegetatively produced descendants of a single parent

  3. Sexually produced descendants of a single couple

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

A clone is considered as the vegetatively produced descendants of a single parent because of following reason: 

1) Fusion of gametes does not takes place in vegetative propagation so there is no chance of recombination and variation.
2) The parent cell divides to form daughter cell by mitosis due to which the offspring is genetically identical to the parent.
3) The offspring produced are clones of their parent and have same number of chromosomes.
So, the correct answer is option B.

Multiple choice evs seed becomes plant introduction to reproduction vegetative reproduction budding, vegetative propagation and spore formation other modes of vegetative propagation the journey of seeds

Which of the following are the characteristics

of vegetative reproduction?

X Involves two individuals

Y Daughter cells are genetically identical to the parent

Z The cell divisions are only mitotic

  1. X and Y only

  2. X and Z only

  3. Y and Z only

  4. X, Y and Z
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Vegetative reproduction is a type of reproduction in which a single parent is involved. In this there is no formation or fusion of gametes. 
In cloning method of  vegetative reproduction the offspring produced are genetically identical to the parent cell. They are exact copies of the parent and thus are called clones.
Mitosis is a process in which a cell divides into two daughter cells. In this there is distribution of the cytoplasm and genetic material equally into both cells. This is a method of vegetative reproduction in some lower organisms.
Thus the correct answer is option C.