Sexual Reproduction in Animals

Q.

In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as

1. Autogamy

2. Parthenocarpy

3. Syngamy

4. Parthenogenesis

Q.

A few statements with regard to sexual reproduction are given below
i. Sexual reproduction does not always require two individuals
ii Sexual reproduction generally involves gametic fusion
iii Meiosis never occurs during sexual reproduction
iv External fertilisation is a rule during sexual reproduction
Choose the correct statements from the options below:
(a) i and iv, (b) i and ii
(c) ii and iii (d) i and iv

Q. Read the following statements carefully and specify which ones are true.
I. Poultry birds can be made to lay eggs throughout the year
II. Poultry birds can be considered as continuous breeders
III. Laying of eggs in poultry birds is not related to reproduction

1. I and III are true
2. I, II, III are true
3. Only I is true
4. I and II are true

Q. Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect?

1. Ovules develop into an embryo sac
2. Ovary develops into a fruit
3. Zygote develops into an embryo
4. PEC forms the endosperm

Q. Reproductive processes and the associated behavioural expressions of organisms are regulated by____________.

1. hormones
2. environmental factors
3. none of the above
4. interaction between hormones and certain environmental factors.

Q. Select T and F for true and false statements respectively.
i) Birds living in nature lay eggs seasonally.
ii) Birds in captivity are made to lay eggs throughout the year.
iii) Captive birds laying eggs is related to reproduction.
iv) The females of placental mammals show cyclical changes in the activities of ovaries but have steady hormones during the reproductive phase.

1. i-T, ii-T, iii-T, iv-F
2. i-T, ii-F, iii-F, iv-T
3. i-T, ii-T, iii-T, iv-T
4. i-T, ii-T, iii-F, iv-F

Q. Assertion: Sexual reproduction results in offspring that are not identical to the parents or amongst themselves.
Reason: It is an elaborate, complex and slow process

1. If both assertion and reason are true and the reason is the correct explanation of assertion.
2. If both assertion and reason are true but the reason is not the correct explanation of assertion.
3. The assertion is true but the reason is false.
4. Both the assertion and reason are false.

Q. All RTI are STDs but not all STDs are RTIs . Justify with example.

Q.

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because

1. Genetic material comes from parents of two different species.

2. Sexual reproduction is a lengthy process.

3. Gametes of parents have qualitatively different genetic composition.

4. Greater amount of DNA is involved in sexual reproduction.

Q.

The correct sequence of different phases of an organism is

1. Vegetative phase - Senescence phase - Reproductive phase

2. Juvenile phase - Reproductive phase - Maturity phase

3. Juvenile phase - Maturity Phase - Old age

4. Vegetative phase - Old age - Senescence phase

Q.

Sexual reproduction always involves the formation of male and female gametes produced by two different organisms of the same species.

1. True

2. False

Q.

Are there any difference between OVA and Ovum?when i call ova and when ovum?

Q.

Conjugation phenomenon of sexual reproduction is seen in

1. Paramoecium

2. E.coli

3. Both (a) and (b)

4. Hydra

Q. Which part of pollen grain produces pollen tube

1. Male nuclei
2. Exine
3. Intine
4. Both b and c

Q. Write ‘True’ or ‘False’ for the statement given below:

Sexual reproduction always involves the fusion of gametes of male and female parents.

1. True
2. False

Q.

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because
(a) Sexual reproduction is a lengthy process
(b) Gametes of parents have qualitatively different genetic composition
(c) The genetic material comes from parents of two different species
(d) Greater amounts of DNA is involved in sexual reproduction

Q.

Given below are few statements about sexual reproduction.
Choose the correct set of statement(s).

1. Involves fusion of male and female gametes.

2. Females usually produce more gametes when compared to males.

3. It is an elaborate, complex and slow process.

4. Offsprings are genetically identical among themselves but different from parents.

1. 1, 2 and 3

2. All the above

3. 1 and 2 only

4. 1 and 3 only

Q.

The type of reproduction in which only single parent is involved is called _________ reproduction.

Q. When two parents participate in reproductive process and also involve fusion of their gametes, it is called

1. Asexual reproduction
2. Sexual reproduction
3. Artificial reproduction
4. Vegetative reproduction

Q. Consider the given sexually transmitted diseases given below and identify how many of these are transmitted by bacteria?

Gonorrhea, Syphilis, Genital herpes, Chlamydiasis, Genital warts, Trichomoniasis, Hepatitis B, AIDS

1. 2
2. 3
3. 4
4. 1

Q.

Define

(a) Juvenile phase,

(b) Reproductive phase,

(c) Senescent phase.

Q. Which type of reproduction is present in figure below

1. Vegetative reproduction
2. Asexual reproduction
3. Sexual reproduction
4. Binary fission

Q. Sexual reproduction involves formation of the male and female gametes by

1. Either a or b
2. Different individuals of the same sex
3. Same individual
4. Different individuals of the opposite sex

Q. Match the following.

$\begin{array}{cc}\text{(A) Endogamy}& \text{(I) Cross fertilization}\\ \text{(B) Exogamy}& \text{(II) Self fertilization}\\ \text{(C) Isogamy}& \text{(III) Fusing gametes are different in form, size structure and behaviour.}\\ \text{(D) Sexual reproduction}& \text{(IV) Fusing gametes are similar morphologically}\end{array}$

1. (A) – (II), (B) – (I), (C) –(IV), (D) –(III)
2. (A) – (I), (B) – (II), (C) –(III), (D) –(IV)
3. (A) – (III), (B) – (I), (C) –(IV), (D) –(II)
4. (A) – (IV), (B) – (I), (C) –(III), (D) –(II)

Q. Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?
(i) Eggs of both are formed only once in a lifetime.
(ii) Both the angiosperm egg and human egg are stationary.
(iii) Both the angiosperm egg and human egg are motile transported.
(iv) Syngamy in both results in the formation of zygote.
Choose the correct answer from the options given below.

1. (ii) and (iv)
2. (iv) only
3. (i) and (iv)
4. (iii) and (iv)

Q. If we ignore the effect of crossing over, how many different haploid cells arise by meiosis in a diploid cell having 2n = 12?

1. 8
2. 32
3. 64
4. 16

Q.

One can avoid transmission of STDs by:

i. Avoiding sex with multiple partners

ii. Always having protected sex with unknown partners

iii. Not using condoms during intercourse

iv. Avoiding sex with unknown partners

v. Avoiding needle sharing

1. ii, iii, iv, v

2. i, ii, iii, iv

3. i, ii, iv, v
4. iii, iv, v

Q.

1. 62
2. 63
3. 61
4. 50

Q. Transmission of sexually transmitted diseases like syphilis can be prevented by

1. medical termination of pregnancy
2. undergoing tubectomy
3. use of the correct dose of a good birth control pill
4. complete abstainment from coitus

Q. Select T and F for true and false statements respectively.
i) Birds living in nature lay eggs seasonally.
ii) Birds in captivity are made to lay eggs throughout the year.
iii) Captive birds laying eggs is related to reproduction.
iv) The females of placental mammals show cyclical changes in the activities of ovaries but have steady hormones during the reproductive phase.

1. i-T, ii-T, iii-F, iv-F
2. i-T, ii-F, iii-F, iv-T
3. i-T, ii-T, iii-T, iv-F
4. i-T, ii-T, iii-T, iv-T