Events in Sexual Reproduction

Q.

Which has more mitochondria sperm or egg?

Q.

Millions of sperms are produced but only one sperm fertilizes the egg. Is it true? Explain.

1. True
2. False

Q. Zygotes formed by internal fertilisation have better chance of survival than the ones formed by external fertilisation.

1. True

2. False

Q.

Gametogenesis involves

1. mitosis

2. meiosis

3. amitosis

4. fission

Q.

Where does internal fertilization occur?

Q.

In organisms exhibiting internal fertilization

1. The male gamete is motile

2. The number of male gametes produced is large

3. Female gametes produced are less

4. All the above are true

Q. After fertilisation, what is the time period required for the formation of blastocyst?

1. 7 days
2. 8 days
3. 9 days
4. 10 days

Q.

Read the following statements and identify the incorrect one(s) related to external fertilisation.

1. Organisms show great synchrony between sexes and release both the gametes simultaneously.

2. Not only the male gametes but also female gametes are released in large numbers.

3. Less number of offsprings are produced as fusion of male and female gametes is a chance.

4. Offsprings are extremely vulnerable to predators threatening their survival up to adulthood.

Q. Eggs are produced in more number than sperm.

1. False
2. True

Q. Which of the following organisms undergo internal fertilisation?

1. Frogs
2. Sea urchin
3. Gymnosperms
4. Birds
5. Bryophytes
6. Crabs
7. Reptiles
8. Pteridophytes

Q. Which of the following are ovoviviparous organisms?

1. Shark
2. Frog
3. Fishes
4. Snake

Q.

Match the following
$\begin{array}{cc}\text{Column}-I& \text{Column}-II\\ A.\text{Fishes and amphibians}& 1.\text{Fertilization is internal and development is external}\\ B.\text{Reptiles and birds}& 2.\text{Both fertilisation and development is internal}\\ C.\text{Mammals}& 3.\text{Both fertilisation and development is external}\end{array}$

1. A-3, B-1, C-2

2. A-1, B-2, C-3

3. A-3, B-2, C-1

4. A-1, B-3, C-2

Q. is the process in which pollen grains from anther are tranferred to stigma of a flower.

1. Pollination
2. Gametogenesis
3. Embryogenesis
4. Fertilisation

Q. A tadpole develops into an adult frog by the process of _______.

1. fertilisation
2. metamorphosis
3. budding
4. fission

Q.

Embryogenesis involves

1. None of these

2. Both a & b

3. Cell differentiation

4. Cell division

Q.

Identify the correct sequence of events in sexual reproduction.

1. Syngamy
2. Zygote formation
3. Gametogenesis
4. Embryogenesis
5. Gamete transfer

Q. Which of the following does not exhibit internal fertilization?

1. Frog
2. Lizard
3. Cow
4. Crow

Q. Which of the following are events in pre-fertilisation?

1. Gametogenesis
2. Embryogenesis
3. Gamete transfer
4. Fertilisation

Q.

In humans, non-motile and food storing germ cells is ________ and the motile germ cell is _________.

1. ovule, anther

2. ovum, sperm

3. sperm, ovum

4. ovule, sperm

Q.

Consider the statements given below. Select the correct option :

Statement A: The chance of survival of young ones is greatest in viviparous organisms

Statement B: The fertilized eggs are covered by hard calcareous shell in viviparous organisms.

1. Both the statements are correct and B is the reason for A

2. Both the statements are wrong

3. Statement A is correct and B is wrong

4. Statement A is wrong and B is correct