The Endocrine System — Biology STD 10 — Question

Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Cerebrum: Diencephalon:: Cerebellum: ……………….

The pairing of homologous chromosomes is called _______.

Active transport is in a direction________________ to that of diffusion.

Phytohormones can either act _____________ or _____________ with one another.

Given below is certain structure. Write against them its functional acivity. 
Olfactory nerve and ……………..

A plasmolysed cell has __________ protoplast.

Polytene chromosomes are found in _______ of fly larvae.

Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ............ Snake → ...............

______ is manmade compounds that have been widely used as refrigerants and in spray propellants and foam blowing.

The site of light reaction in the cells of a leaf is ________ . (cytoplasm, stroma, grana)