Introduction to Reproduction

Q.

Is asexual reproduction mitosis or meiosis?

Q.

What is significance of sexual reproduction?

Q.

Answer the following:

(i) Define variation.

(ii) How are heritable variations produced in an organism?

(iii) What is the source of variations in asexually-reproduced organisms?

Q.

What is the effect of DNA copying which is not perfectly accurate in the reproduction process?

Q.

List six specific characteristics of sexual reproduction.

Q. Why is sexual reproduction more advantageous over asexual reproduction?

Q.

Asexual reproduction involves________.

1. only one parent

2. two parents

3. meiosis and syngamy

4. fusion of two gametes

Q. The period of time between the birth and death of an organism is called its .

1. life cycle
2. life span
3. life history

Q. Explain asexual reproduction? Differentiate between sexual and asexual reproduction?

Q. Differentiate between Sexual reproduction and Asexual Reproduction

Q.

Give reason: (i) Variations arising in sexually-reproducing organisms.

Q.

How will an organism be benefited if it reproduces through spores?

Q.

The method of reproduction that involves only one parent is called asexual reproduction.

1. True
2. False

Q.

Which of the following is not true regarding asexual reproduction?

1. The offsprings produced are not identical to the parents

2. There is none or very less genetic diversity among the species

3. A single parent is involved in this process

4. Genetic diversity can be introduced by gene mutation

Q. How temperature play a role in reproduction?

Q.

The sex chromosomes of a human female are

1. XX

2. XY

3. YY

4. XO

Q. Prior to division, each chromosome is composed of two genetically identical parts called ________

1. Nucleosomes
2. Dyads
3. Chromatin
4. Sister chromatids

Q.

What are the little round balls inside the moss capsule?

Q.

Question 49
Why are budding, fragmentation and regeneration all considered as asexual types of reproduction? With neat diagrams explain the process of regeneration in Planaria?

Q.

The family pedigree of queen Victoria was a carrier of _________ .

Q. Assertion :Asexual reproduction is also called blastogenesis. Reason: In asexual reproduction, there is no formation and fusion of gametes.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Assertion is incorrect but Reason is correct.

Q.

Which of the following is not true?

1. Primary sexual characters are present from birth

2. Secondary sexual characters include the ovary and penis

3. Secondary sexual characters are not directly related to production of gametes

4. Primary and secondary sexual characters differentiate humans into sexually dimorphic species

Q.

Why do organisms reproducing sexually show high diversity?

Q.

Which of the following is not true regarding sexual reproduction?

1. Sexual reproduction takes more time for completion.

2. Children born are not identical to the parents.

3. Sexual reproduction plays an important role in natural selection.

4. All animals have fixed sexes.

Q.

Process of fusion of male gamete and female gamete.

1. Pollination

2. Fertilisation

3. Micturition

4. Reproduction

Q.

What type of reproduction gives rise to more number of variations?

Q.

How does the creation of variations in a species promote survival?

Q. Define the following:
(i) parthenogenesis
(ii) Asexual reproduction
(iii) Sexual reproduction
(iv) Dioceious
(v) Monoceious
(vi) Clone

Q.

What animal has an oviduct?

Q. Assertion :All organisms reproduce for perpetuation of a population. Reason: Reproduction is an all inclusive characteristic of living organisms.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect