Tag: modes of reproduction

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Questions Related to modes of reproduction

Multiple choice botany modes of reproduction sexual reproduction in organisms sexual reproduction & its importance reproduction in organisms

The limited period of sexual receptivity that occur around the time of ovulation in all female mammals, except human, is called

  1. Oogenesis

  2. Menstruation

  3. Estrus

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

Estrus is the period in the sexual cycle of female mammals, except humans during which they are in heat, i.e ready to mate. Prior to ovulation, the endometrium (uterine lining) thickens, in preparation for holding the fertilized ova. As the proliferation of uterine tissue reaches its peak, receptivity is the highest which is called the oestrous period. The period of sexual receptivity is primarily initiated by the elevation in estrogens from mature follicles just prior to ovulation. The basic pattern of the oestrous cycle is the same in all domestic animals, but some specific differences are found in specific parts of the cycle. 

So the correct option is 'estrus'.

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

Read the following statements about reproduction and select the incorrect one.

  1. It is a biological process in which an organism gives rise to young ones

  2. It enables the continuity of the species

  3. It produces genetic variations in organisms

  4. It maintains populations of the young and adult persons only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Reproduction is a biological process in which an organism gives rise to young ones. It is a fundamental feature of all known life. Reproduction enables the continuity of the species and produces genetic variations in organisms. 
  • Reproduction not only maintains populations of the young and adult persons but also that of older adults.
  • Reproduction is a key process that determines the distribution of people of various ages in a population, called age structure.
  • So the correct option is D.
Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

The phenomenon wherein, the ovary develops into a fruit without fertilisation is called.

  1. Parthenocarpy

  2. Apomixis

  3. Asexual reproduction

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

Fertilised ovary is technically called fruit. But if ovary develops into fruits, without fertilisation, it is called parthenocarpic fruit. Such fruits are generally seedless. Some common examples found in nature are: Citrus, banana, etc., Parthenocarpy can be artificially induced too by application of certain plant hormones, especially, auxins and gibberellins.

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

Reproduction is essential for living organisms in order to

  1. Keep the individual organism alive

  2. Fulfill their energy requirement

  3. Maintain growth

  4. Continue the species generation after generation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Reproduction is an essential process required for continuity of life and survival of species generation after generation. 
  • An individual has a limited lifespan and lives for a defined time period but species survive and evolve for a much longer duration. Reproduction serves no other purpose and is not required for energy production or growth of an organism.

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

The process of development of organism like itself is called as

  1. Budding

  2. Flowering

  3. Reproduction

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

Reproduction can be defined as the biological process by which new individuals or offsprings are produced from their 'parents'. Offsprings are little similar to their parents.
Budding is a type of asexual reproduction by which offsprings arise from a single organism.

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

Fusion of male and female gamete is termed as

  1. Reproduction

  2. Vegetative propagation

  3. Fertilization

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

Reproduction is a process by which there is the production of a new organism by combining the genetic material of two different individuals. It occurs in eukaryotes. A process similar to sexual reproduction (conjugation, transduction, transformation) also takes place in prokaryote also but it is not a reproduction.

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

Reproduction is essential for living organisms in order to

  1. Keep the individual organism alive

  2. Fulfill their energy requirement

  3. Maintain growth

  4. Continue the species generation after generation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Reproduction is important because, with the help of reproduction, a new generation of species are produced. With the help of reproduction, genetic traits of that species are transferred from one generation to another.

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

Which of the following statement is not correct?

  1. Human show spontaneous ovulation

  2. Several enzymes occur in bile juice

  3. Monkeys, apes and humans have oestrus cycle

  4. Urine is pale yellow and slightly alkaline
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

A. Human show spontaneous ovulation that means ovum is released in every menstrual cycle irrespective of the fertilization event.

B. Bile juice does not contain the enzymes. It has ions and bile salts.
C. Monkeys, apes, and humans have the menstrual cycle in which endometrium breaks down and falls off. The estrous cycle occurs in animals like cows in which the endometrium is reabsorbed.
D. Urine is pale yellow and slightly alkaline due to bicarbonate ions.
Hence, the correct answers include 'Several enzymes occur in bile juice' and 'Monkeys, apes and humans have estrous cycle'

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

Choose the correct statement about reproduction


I) It produces progeny with more or less similar features to parents.
II) It occurs by involving one parent (asexual) or two parents (sexual).
III) It is through budding, fragmentation spores or gametes.
IV) It is not observed in non-living organisms.

  1. All of the above

  2. All except I

  3. All except IV

  4. All except III
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reproduction is the biological process, through which a new organism produced from their parents. It is of two types - sexual reproduction, asexual reproduction. Asexual reproduction occurs through the involvement of the single parent. It occurs by many methods e.g .budding, fragmentation, spores. Asexually reproduce offspring is an identical copy of their parents. Sexual reproduction occurs through the involvement of two parents. It occurs through the male and female gametes. Sexually reproduce offspring are less similar to their parents. Reproduction is always observed in living organisms.

So, the correct answer is 'All of the above',

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

Reproduction is the characteristics of living organisms, but it cannot be regarded as defining property because

  1. Asexual reproduction involves only single parent

  2. Lower organisms do not reproduce under stressful environmental conditions

  3. All living beings do not have the capacity to reproduce

  4. For lower plants growth and reproduction are mutually inseparable phenomenon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Reproduction is the process by which living organisms produce new offspring similar to themselves.
  • All living organisms do not have the capacity to reproduce. For example worker honeybees, mule or sterile human couples. Despite their inability to reproduce, they show other characteristics of living organisms.


So, the correct option is 'All living beings do not have the capacity to reproduce'