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The World of The Living

Multiple Choice Questions

11.

Viviparous germination of seeds occurs in

mango
rhizophora
potato
sugarcane

12.

The component of blood that prevents its clotting in intact blood vessels is

antibody
heparin
thrombin
haemoglobin

13.

Islets of Langerhans are present in

stomach
liver
pancrease
heart

14.

Enzymes are chemically

lipid
acid
carbohydrate
protein

15.

True fruits develop from

thalamus
petal
ovary
sepal

16.

Plant which reproduces by means of spores instead of seeds is

coriander
fern
mustard
petunia

17.
The element, essential for synthesis of protein in plants, is

copper

nitrogen

magnesium

iron

nitrogen

Nitrogen is an essential element for the synthesis of amino acids. There are nearly 20 amino acids found in nature. Every amino acid contains an amino group, in which nitrogen element is present. The deficiency of nitrogen is reflected in plants as they become chlorotic and yellow in appearance.