Answer
425.4k+ views
Hint: Animals have various features which place them in different categories. One of those categories is the form in which their young ones are hatched. The animals can either lay eggs or can give birth by developing them inside their body, like humans.
Complete answer:
What are microlecithal eggs? The simple eggs having little yolk are called microlecithal. This is the basis of differentiation in the animal kingdom based on the eggs. The eggs with more yolk are called macrolecithal eggs.
Let us see which class has the microlecithal eggs.
Option A: Reptilia and Aves: Both reptilian and aves (birds) have macrolecithal eggs as they have the most yolk or there is an uneven distribution of yolk in the cytoplasm.
Option B: Amphibia, Aves and Reptilia: Amphibians have mesolecithal eggs that means that the yolk amount is more than the microlecithal ones. But the reptiles and aves have macrolecithal eggs.
Option C: Reptilia, Aves and Chiroptera: Reptiles and aves have the macrolecithal eggs that are their yolk amount are the maximum. The Chiroptera are the bats (egg-laying mammals), they also have macrolecithal eggs.
Option D: Eutheria: They are the non-egg laying mammals like humans which give birth to their young ones, they have very little/negligible yolk, so they have microlecithal eggs.
So the answer is option D: Eutheria.
Note: Eutheria is the mammal which gives birth to young ones. They are the chorioallantoic placental animals. The organ helps to provide nutrition to the fetus inside the mother's womb. Platypus, koalas are egg giving mammals.
Complete answer:
What are microlecithal eggs? The simple eggs having little yolk are called microlecithal. This is the basis of differentiation in the animal kingdom based on the eggs. The eggs with more yolk are called macrolecithal eggs.
Let us see which class has the microlecithal eggs.
Option A: Reptilia and Aves: Both reptilian and aves (birds) have macrolecithal eggs as they have the most yolk or there is an uneven distribution of yolk in the cytoplasm.
Option B: Amphibia, Aves and Reptilia: Amphibians have mesolecithal eggs that means that the yolk amount is more than the microlecithal ones. But the reptiles and aves have macrolecithal eggs.
Option C: Reptilia, Aves and Chiroptera: Reptiles and aves have the macrolecithal eggs that are their yolk amount are the maximum. The Chiroptera are the bats (egg-laying mammals), they also have macrolecithal eggs.
Option D: Eutheria: They are the non-egg laying mammals like humans which give birth to their young ones, they have very little/negligible yolk, so they have microlecithal eggs.
So the answer is option D: Eutheria.
Note: Eutheria is the mammal which gives birth to young ones. They are the chorioallantoic placental animals. The organ helps to provide nutrition to the fetus inside the mother's womb. Platypus, koalas are egg giving mammals.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)