Tag: the life cycle of animals

Questions Related to the life cycle of animals

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

Show answer
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

Show answer
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'.

The process by way of which a larva or miniature adult comes out of the egg membranes is known as

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

  1. Hatching

  2. Emboly

  3. Epiboly

  4. Ingression

Show answer
Correct Option: A
Explanation:

Larva comes out from the egg membranes is called as Hatching. Formation of a gastrula from a blastula by invagination is called as Emboly. cell movements that occur in the Gastrulation stage of embryonic development of some organisms are called as Epiboly and changes in the location or relative position of cells that takes place during the gastrulation stage of animal development is called as Ingression.

So the correct option is 'Hatching.'

Organisms which give birth to young ones directly are

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

  1. Oviparous

  2. Ovoviparous

  3. Viviparous

  4. Both A and B

Show answer
Correct Option: C
Explanation:

Option C viviparous

Animals that have live births because they nourish the unborn young internally with a placenta are the mammals, except the monotremes. They retain their eggs internally until they hatch then feed the young milk. These are the viviparous mammals.

A hatching egg of chick is covered by plaster of paris. It is harmful for 

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

  1. Mother

  2. Respiration

  3. Excretion

  4. None of the above

Show answer
Correct Option: B
Explanation:

Egg of the chick is porous, which allows the exchange of oxygen and carbon dioxide between the inside of the egg and the environment. If it is covered by plaster of paris, then pores will be closed which can lead to several respiratory problems.
So, the correct answer is option B.