MCQ
Types of cleavage in centrolecithal eggs is:
- ASpiral
- BSuperficial
- CDiscoidal
- DUnequal holoblastic
Explanation:
Centrolecithal eggs describe the placement of the yolk in the centre of the cytoplasm of the ovum.
The cytokinesis of centrolecithal zygotes undergoes meroblastic cleavage.
It is a type of cleavage where the cleavage plane extends only to the accumulated yolk and is superficial.
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| Column $- I$ | Column $- II$ |
| $(A)$ Physiological barrier | $(1)$ Skin |
| $(B)$ Cellular barrier | $(2)$ Macrophages |
| $(C)$ Physical barriers | $(3)$ interferons |
| $(D)$ Cytokine barriers | $(4)$ Tears |
| $(5)$ Mucus |