Tag: oviparous and viviparous

Questions Related to oviparous and viviparous

The eggs of fish are covered by

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Jelly like membrane

  2. Hard shell

  3. Both A and B

  4. None of these

Show answer
Correct Option: A
Explanation:

The egg of fish is surrounded by a jelly-like membrane but does not develop a hard shell. Some fishes lay an egg that is covered by a hard leathery coat.

So, the correct answer is option A.

The eggs of frogs do not have shells for protection, yet they are safe in water. How?

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. They are covered and embedded in a jelly like strip

  2. They are covered with bark

  3. They are covered with yolk

  4. Both A and B

Show answer
Correct Option: A
Explanation:

  • The female frog covers the eggs with a jelly-like substance that causes the eggs to float to the water's surface and also protects from any damage.

So, the correct answer is option A.

Offsprings of oviparous animals are at greater risk of survival as compared to those of viviparous animals because

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Proper embryonic care and protection is absent

  2. Embryo does not develop completely

  3. Progenies are of smaller size

  4. Genetic variations do not occur

Show answer
Correct Option: A
Explanation:
In oviparous animals such as reptiles and birds, fertilised eggs are covered by hard calcareous shell and are laid in a safe place. After incubation period, young ones hatch out. In viviparous animals such as majority of mammals including human beings, the zygote develops into a young one inside the body of the female individual. After a certain growth, young ones are delivered by the female individual. Due to proper care and protection, the chances of survival of young ones are more in viviparous individuals.
So, the correct answer is 'Proper embryonic care and protection is absent'.

Select the option which shows viviparous animals only.

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Lizard, Turtle

  2. Platypus, Crocodile

  3. Cow, Crocodile

  4. Whale, Mouse

Show answer
Correct Option: D
Explanation:
In viviparous animals, females give birth to young ones. The development of zygote takes place inside the female's body. Females deliver young ones and the chances of survival of offsprings are more. Mammals (except egg-laying mammals), like whale, shark, mouse, humans are examples of viviparous animals.
So, the correct answer is 'Whale, Mouse'.

Statement $1$: Viviparous animals give better protection to their offspring.
Statement $2$: In viviparous animals, young ones, after attaining a certain state of growth, are delivered out of the body of the female organism.

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Both statements $1$ and $2$ are correct

  2. Statement $1$ is correct but statement $2$ is incorrect

  3. Statement $1$ is incorrect but statement $2$ is correct

  4. Both statements $1$ and $2$ are incorrect

Show answer
Correct Option: A
Explanation:

In oviparous animals such as reptiles and birds, fertilised eggs are covered by hard calcareous shell and are laid in a safe place. After incubation period, young ones hatch out. In viviparous animals such as majority of mammals including human beings, the zygote develops into a young one inside the body of the female individual. After a certain growth, young ones are delivered by the female individual. Due to proper care and protection, the chances of survival of young ones are more in viviparous individuals.

So, the correct answer is 'Both statements 1 and 2 are correct'.

In these animals, the female retain the eggs inside the body after fertilisation and allows the development of embryo inside the body without providing extra nourishment to the developing embryo as the placenta is absent. Such animals are called as

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Oviparous animals

  2. Viviparous animals

  3. Ovoviviparous animals

  4. None of the above

Show answer
Correct Option: C
Explanation:
In ovoviviparous animals, the female retain the eggs inside the body after fertilisation and allows the development of the embryo inside the body without providing extra nourishment to the development embryo as the placenta is absent. However, the female animals give birth to the young ones. Example of ovoviviparous animals are sharks and rattle snakes.
So, the correct answer is 'Ovoviviparous animals'.

Which one of the following is oviparous?

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Platypus

  2. Flying fox (Bat)

  3. Elephant

  4. Whale

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Correct Option: A
Explanation:

Platypus, bat, elephant and whale, all belong to. Class Mammalia of sub-phylum Vertebrata. Out of the four, only platypus is oviparous (egg laying), rest are viviparous (glib birth to young ones).

Those who give birth to young-ones are called viviparous. Some flabes lay eggs. Therefore,

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Some frogs do lay eggs

  2. Some frogs are fishes

  3. Some fishes do not lay eggs

  4. Some fishes are oviparous

Show answer
Correct Option: C
Explanation:

Giving birth to live young is called vivipary. When a species lay eggs it is called oviparity.

So, the correct option is 'Some fishes do not lay eggs'.

Egg with peripheral cytoplasm around the yolk is

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Isolecithal

  2. Microlecithal

  3. Telolecithal

  4. Centrolecithal

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Correct Option: D
Explanation:

Centrolecithal eggs have yolk concentrated in the center as in insects. 

Telolecithal eggs have yolk concentrated at one end. 
Isolecithal eggs have yolk evenly distributed in the cytoplasm. 
Microlecithal eggs have a very little yolk.
So, the correct answer is option D.

Salamandra atra is 

biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

  1. Ovoviviparous

  2. Oviparous

  3. Sexually sterile

  4. Parthenogenetic

Show answer
Correct Option: A
Explanation:

Ovoviviparous is the method of reproduction in which animals produce eggs, but instead of laying the eggs, the eggs develop within the mother's body. The eggs hatch within the mother. After hatching, they remain inside the mother for a time and are nourished there. 

In salmonella atra, offspring after hatching undergoes metamorphosis inside the body of the mother. Offspring is delivered after complete metamorphosis. This is why they have a gestation period of two-four years.
So, the correct option is 'Ovoviviparous'.