Transpiration — Biology STD 10 — Question

The population of whole of Asia beyond 2001 AD is expected to be ______.

Complete the following sentence with appropriate word:

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

Petrol engine gives off gaseous oxides of ______

Photosynthesis produces oxygen and ______.

Given below are hypothetical figures in regard to population (in crores) of two countries A and B during the last three decades.

Country	1971	1981	1991
A	6.4	9.6	10.6
B	15.7	15.7	15.3

Fill in the blanks :
Rate of growth of population of country _______ has declined between years __________ and _________ .

When oxygen is in fairly high concentration, the haemoglobin quickly combines with it and forms an unstable compound known as _______________.

The dark reaction of photosynthesis is known as ________ . (Hill reaction, cyclic phosphorylation, Calvin cycle)

Ganong's potometer is designed to measure the rate of water ___________ (i) ___________ by a plant, which indicates the rate of ___________ (ii) ___________ . However, it has limitations, including the inability to measure transpiration under ___________ (iii) ___________ environmental conditions. The rate of transpiration is affected by several factors such as ___________ (iv) ___________, ___________ (v) ___________ , and light intensity, all of which can alter water loss in plants.

The average heart rate is ____________ beats per minute in human being.

The sequence of one systole followed by one diastole is termed as the ___________.