Tag: a study on animals

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Questions Related to a study on animals

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

In markets, eggs of birds are available but never eggs of dogs, because

  1. Birds lays eggs but dogs do not

  2. Bird's eggs are large but dog's eggs is very small

  3. Bird's eggs are covered but dog's eggs are not

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Birds are oviparous meaning they lay eggs. On the other hand, dogs do not lay eggs and are viviparous meaning dogs give birth to live young ones. So, bird's eggs are available in markets. 

So, the correct answer is option A.

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Select the option which shows viviparous animals only.

  1. Lizard, Turtle

  2. Platypus, Crocodile

  3. Cow, Crocodile

  4. Whale, Mouse
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

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.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  1. Oviparous animals

  2. Viviparous animals

  3. Ovoviviparous animals

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

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

  1. Some frogs do lay eggs

  2. Some frogs are fishes

  3. Some fishes do not lay eggs

  4. Some fishes are oviparous
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Egg with peripheral cytoplasm around the yolk is

  1. Isolecithal

  2. Microlecithal

  3. Telolecithal

  4. Centrolecithal
Reveal answer Fill a bubble to check yourself
D Correct answer
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.