Absorption by Roots — Biology STD 10 — Question

The sperm is a specialised cell designed for the purpose of (i) ___________ It consists of a head, which contains the (ii) ___________ a midpiece packed with (iii) ___________ to provide energy, and a long (iv) ___________ that propels the sperm towards the egg. During (v) ___________ the sperm merges with the egg, leading to the formation of a zygote.

The three distinct types of blood vessels are ____________, ____________ and ____________ .

The chemical substance used to test the presence of starch in the cell of a leaf is ___________ .

Population increases in ______ ratio while food production increases in arithmetic ratio.

A light reaction is a ___________ reaction.

Acid rain is caused by oxides of ______, ______.

Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus: Receptor:: Impulse: …………….

DNA acts as director of ______ synthesis.

Complete the following sentence with appropriate word:

Automatic self-regulation of salt and water within the body is known of ______.

Complete the following sentence with appropriate word:

The process of releasing urine is ______.