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 botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

The process in which new organisms are formed by existing organism is called as ___________

  1. Reproduction

  2. Growth

  3. Development

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

  • Reproduction is the biological process in which new individual organisms 'offsprings' are produced from their parents (existing organisms).
Growth is the process of increasing in physical size.
  • Development is the act or process of growing or causing something to grow or become larger or more advanced.

Therefore, the correct answer is option A.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Which of the following is associated with reproduction?

  1. Parthenogenesis

  2. Fertilization

  3. STDs

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Parthenogenesis is a natural form of asexual reproduction in which growth and development of embryos occur without fertilization.
Fertilization is the action or process of fertilizing an egg or a female animal or plant, involving the fusion of male and female gametes to form a zygote.
STDs stands for sexually transmitted disease. It is the infection transmitted through sexual contact, caused by bacteria, viruses or parasites.
So, the correct answer is option D.
Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Reproduction is a .......... process of life.

  1. Structural

  2. Metabolic

  3. Fundamental

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

Reproduction is the process of continuation of a species. It is a mode of production of new organisms, called offsprings, from their parents. Each organism exists due to reproduction. With every new offspring, genetic variations are passed from the parents, that help the offspring survive better in the environment. Such variations and adaptations contribute to a species sustaining life for a longer duration.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

What is the importance of reproduction?

  1. Regeneration

  2. Replication

  3. Both A and B

  4. Regeneration and passing genes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Reproduction is the method of making a copy of organisms or reproducing young ones. During reproduction, meiosis is the first stage by which gametes are prepared. 
  • Each gamete contains a copy of male or female parents. When a zygote is formed by the fertilization of the gametes, the genetic copy of both the parents come into the offspring. Thus, it helps in the passing of genes.

 Therefore, the correct answer is option D.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Which one the following is a requirement for sexual reproduction?

  1. Male and female parents

  2. Production of gametes

  3. Optimal environmental conditions

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

Sexual reproduction is the production of new living organisms by combining genetic information from two individuals of different types (sexes). In most higher organisms, one sex (male) produces a small motile gamete which travels to fuse with a larger stationary gamete produced by the other (female). Nearly all animals employ a diploid-dominant life-cycle strategy in which the only haploid cells produced by the organism are the gametes. Early in the development of the embryo, specialized diploid cells, called germ cells, are produced within the gonads (such as the testes and ovaries)

So, the correct answer is 'production of gametes'

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Reproduction may be defined as a phenomenon by which organisms

  1. Increase in size

  2. Produce progeny of their own kind

  3. Are produced from single fertilized eggs

  4. Form new tissues and organs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reproduction  is the biological process by which new individual organisms – offspring – are produced from their parents. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. Reproduction in human beings is by sexual reproduction where both the male and female gametes fertilize to give rise to an embryo. The fertilization of human embryo occurs inside the body of the female 

So, the correct answer is 'produce progeny of their own kind'

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Reproduction is the biological process by which new individual organisms or 'offsprings' are produced from their 'parents'. Reproduction is a fundamental feature of all known life; each individual organism exists as a result of reproduction. 
  • Though it is not essential, meaning, if someone does not reproduce, it will not end his life.

Therefore, the correct answer is option A.

Multiple choice biology butterfly and honey bee life cycle of a butterfly metamorphosis in frogs the life of a butterfly types of reproduction in animals oviparous and viviparous

The transformation of larva into an adult through drastic changes is called _______

  1. Metamarphosis

  2. Fertilization

  3. Cloning

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

Metamorphosis is the biological process where a larva transforms into an adult through drastic changes in body structure and physiology. This process is common in insects, amphibians, and other organisms. Fertilization is the fusion of gametes, cloning creates genetic copies, and metamorphosis is the correct term for this transformation.

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Life begin in all sexually reproducing organisms as a

  1. Single-celled zygote

  2. Double-celled zygote

  3. Haploid zygote

  4. Haploid gametes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings begin life as a single cell - the zygote. 

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

When gamete fusion is involved in the formation of new organism the phenomenon is known as

  1. Syngamy

  2. External fertilization

  3. Parthenogenesis

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

Syngamy is a process in sexual reproduction that is defined as the fusion of the male gamete i.e., sperm with the female gamete i.e., egg resulting in the formation of a diploid zygote. Thus the correct answer is option A.

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Isogamy is found in

  1. Hydra

  2. Monocystis

  3. Plasmodium

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

The fusion of similar motile gametes is known as isogamous. Monocystis is an endoparasite in the seminal vesicle and coelom of earthworms. Fusing gametes do not differ morphologically but may be different physiologically. The isogamous gametes fuses to form zygote which develops into sporoblast, sporocyst, trophozoite and finally, to young trophozoite.

So, the correct answer is option B.

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Syngamy can occur outside the body of organisms in

  1. Algae

  2. Ferns

  3. Fungi

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

Syngamy is sexual reproduction by fusion of male gamete( sperm) with female gamete ( egg ) to form a zygote which eventually develops in the new organism.

In algae, the fusion of gametes happens outside the body of a plant, in water. The gametes are single cells without any protection. In all other plants, the fusion of gametes occurs inside the parent body and zygote is protected by the embryo.

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

In sexual reproduction of algae fusion between one large, non-motile (static) female gamete and a smaller motile male gamete is termed as

  1. Isogamous

  2. Anisogamous

  3. Oogamous

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

The fusion of similar motile gametes is known as isogamous.

The motile gametes taking part in fusion may either differ in size or physiological behaviour is known as anisogamous.
Oogamous is a condition of heterogamy where one gamete is large and nonmotile, while the other is small and motile. In sexual reproduction of algae fusion between one large, non-motile (static) female gamete and a smaller motile male gamete is termed as oogamous. The large non-motile female egg fuses with male gamete which is motile and it is known as antherozoid. 
So, the correct answer is option C.