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 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 reproduction in humans twins reproduction and modern technology post fertilization events stds and infertility

The twins which are fused with each other wholly or in part called as

  1. Siamese twins

  2. Fraternal twins

  3. Identical twins

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

Fraternal twins occur when two fertilized eggs are implanted in the uterine wall at the same time that is when the mother releases two eggs and both become fertilized by two different sperms.
Identical twins occur when a single egg is fertilized by a single sperm to form one zygote, but the zygote divides into two separate embryos.
Siamese twins are conjoined twins that are monozygotic twins whose bodies are joined together at birth. This occurs where the single zygote of identical twins fails to separate completely perhaps because they split very late in the development.

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 frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

Insufficient production of ______ in the tadpoles leads to the incomplete development.

  1. Thyroid

  2. Thyroxine

  3. Iodine

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

The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. Thus insufficient production of thyroxine in the tadpoles leads to the incomplete development.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

For the metamorphosis of tadpoles which of the following element must be available in water?

  1. Chlorine

  2. Carbon

  3. Sulphur

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

In an insect or an amphibian, the process of transformation from an immature form to an adult form in two or more distinct stages is known as metamorphosis. For the metamorphosis of tadpoles, thyroid hormone along with the essential constituent iodine is necessary.

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.