Reproduction

Q.

Mitosis is the type of cell division where the number of chromosomes is maintained and in meiosis a diploid cell becomes a haploid cell.

1. False

2. True

Q.

Offsprings formed as a result of sexual reproduction exhibit more variations because

1. Sexual reproduction is a lengthy process.

2. The genetic material comes from two parents of different species.

3. The genetic material comes from two parents of same species.

4. The genetic material comes from many parents.

Q. What is the advantage of sexual reproduction over asexual reproduction?

1. Less number of offspring are produced which means less competition for food.
2. There are more variations in the offspring which give them a better chance of survival.
3. There is no advantage - asexual reproduction is more advantageous.
4. None of these

Q.

One major advantage of sexual reproduction over asexual reproduction is that in sexual reproduction___________.

Q.

Question 21
Reproduction is essential to living organisms in order to

(a) keep the individual organism alive
(b) fulfil their energy requirement
(c) maintain growth
(d) maintain the continuity of species from one generation to another generation

Q. Name the process which is important for the continuation of species from generation to generation.

1. Excretion
2. Reproduction
3. Digestion
4. Respiration

Q.

Question 11
Find out the false statement

(a) Aves are warm blooded, egg laying and have a four- chambered heart
(b) Aves have feather covered body, fore limbs are modified as wings and they breathe through lungs.
(c) Most of the mammals are viviparous.
(d) Fishes, amphibians and reptiles are oviparous

Q.

Question 57
Reproduction is essentially a phenomenon that is not for the survival of an individual but for the stability of a species. Justify.

Q. Fusion of male and female gametes results in the formation of ________ .

A) embryo
B) egg
C) zygote
D) foetus

Q. All living beings grow, mature and die but to ensure continuity of their species they need to ___.

Q. What is incorrect about mitosis?

1. It is a kind of cell division
2. It is required for growth
3. It results in formation of two identical daughter cells
4. The number of chromosomes in daughter cells is reduced

Q. All living beings grow, mature and die but to ensure continuity of their species they need to ___.

Q. Which of the following patterns of reproduction is the major cause of variation?

1. Sexual reproduction
2. Asexual reproduction
3. Both of these
4. None of these

Q. In which of the following the pneumatophores are found?

1. Tinospora
2. Pinus
3. None of the above
4. Rhizophora

Q. Name the type of the fruit and give example of a plant and describe few features of such fruits.

1. This is the aggregate fruit of custard apple $\left(Annona\right)$
2. Such fruits are formed by the ripening of polycarpellary apocarpous condition.
3. Such fruits are also called etaerio of berries
4. All of the above are correct.

Q. What is meiosis?

1. Cell division used for asexual reproduction.
2. Cell division to maintain the number of chromosomes .
3. Cell division to reduce the number of chromosomes to half.
4. Cell division used for growth and development.

Q. is the process of accumulation of changes in body design of organisms, which improves their chances of survival. This idea was proposed by .

1. Taxonomy
2. Evolution
3. Charles Darwin
4. Carolus Linnaeus

Q. It can be inferred that fleas will emerge from eggs as adults _________________.

1. when they outgrow the cocoon
2. after the period of 3 weeks
3. when they sense there is access to blood
4. if there is too much carbon dioxide in the cocoon