Oviparous

Q. Select the correct set of conditions that block polyspermy.

I. Change in the electrical potential of the plasma membrane of oocyte
II. Cortical granule reaction enzymes
III. Fertilisation membrane
IV. Corona radiata

1. I and III only
2. I, II and III
3. I, II and IV
4. I and IV only

Q.

Which one of the following is oviparous?

(a) Platypus

(b) Flying fox (bat)

(c) Elephant

(d) Whale

Q.

Non-cleidoic eggs are found in

1. Fish

2. Birds

3. Mammals

4. Reptiles

Q.

What happens in cortical reaction?

Q.

Why are offspring of oviparous animals at a greater risk as compared to the offspring of viviparous animals?

Q.

Why do polar bodies degenerate?

Q. Choose the incorrect statement regarding oviparous organisms.

1. The egg is covered by a calcareous shell in reptiles and birds
2. They are egg-laying animals
3. Embryogenesis occurs inside the body
4. Fishes and amphibians are oviparous

Q.

Are bats viviparous?

Q.

………………. give birth to young ones.

Q.

Oviparous animals -

1. Lay fertilized eggs

2. Lay fertilized (or) Unfertilized eggs

3. Give birth to young ones

4. Lay unfertilized eggs

Q.

What is the cortical granule reaction?

Q.

What happens in an acrosome reaction?

Q.

What happens when the sperms fuse with the egg plasma membrane?

Q. Animal which lay eggs are called _____

1. Oviparous
2. Vivparous
3. Both a and b
4. None of above

Q.

Define the following terms by giving examples:​

(a) Oviparous​

Q. Which of the following animals give birth to young ones?

1. Ornithorhynchus and Echidna
2. Macropus and Pteropus
3. Balaenoptera and Homo sapiens
4. Both (b) and (c)

Q.

Egg laying animals are called _______ .

Q. Animals giving birth to young ones are

1. Oviparous
2. Viviparpous
3. Triploblastic
4. Coelomate

Q.

Complete the following by using suitable words

The structure which helps to penetrate the egg membrane of the ovum is __________.

Q. Choose the incorrect statement regarding oviparous organisms.

1. They are egg-laying animals
2. The egg is covered by a calcareous shell in reptiles and birds
3. Embryogenesis occurs inside the body
4. Fishes and amphibians are oviparous

Q. Why do fish and frog lays hundreds of eggs at a time but why do hen lays eggs only one at a time?

Q. Why there no reduction in chromosomes in spermatids during spermatocytogenesis in spermatogenesis?

Q. Which substance normally passes from a fetus to its mother through the placenta?

1. Glucose
2. Alcohol
3. Oxygen
4. Urea

Q.

Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?

Q.

Most fishes and amphibians

1. are oviparous

2. are viviparous

3. are ovoviviparous

4. show internal fertilization

Q. The chances of survival of young one is greater in ________ organism

1. Oviparous
2. Viviparous
3. Ovoviviparous
4. Both a and b

Q. Ootheca of cockroach has .................. fertilized eggs.

1. 16
2. 6
3. 8
4. 24

Q.

What is common between Parrot, Platypus, and Kangaroo?

1. Toothless jaws

2. Homoiothermy

3. Functional post-anal tail

4. Oviparity

Q.

Oviparous animals -

1. lay unfertilized eggs

2. lay fertilized eggs

3. give birth to young ones
4. the fertilized eggs hatch within the parent body

Q.

Name the egg membrane which prevents polyspermy.