Chapter 19 - Growth and Development - 8


Biology Class 12
1. The cavity formed between somatic and splanchnic mesoderm is neurocoel


2. The marginal area of the blastoderm in which the cells remain undetached from the yolk and closely adherent to it, is called the zone of junction.


3. Gray crescent is the pigment free area that appears at the time of fertilization


4. Clear cytoplasm produces notochord and neural tube during development of chick embryo.


5. Acetabularia crenulata has a regular shaped cap.


6. The cells from the ventral lip of blastopore are capable of inducing a complete embryo


7. The study of aging is known as gerontology


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