physiology of plants, humans and animals - Category wise Question and Answer Practice Test with Solutions

Question : 16

Air is breathed through

a) Nose — larynx — pharynx — bronchus — alveoli — bronchioles

b) Trachea — lungs — larynx — pharynx — alveoli

c) Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli

d) Nose — mouth — lungs

Question : 17

Translocation of carbohydrate nutrients usually occurs in the form of

a) maltose

b) starch

c) glucose

d) sucrose

Question : 18

Which one of the following is primarily concerned with cell division ?

a) IAA

b) Cytokinin

c) GA₃

d) Ethylene

Question : 19

The physical process involved in the release of molecular oxygen from leaves is

a) transpiration

b) osmosis

c) diffusion

d) capillarity

Question : 20

Parathormone deficiency produces muscle ramps or tetany as a result of

a) enhanced blood Na⁺

b) lowered blood Ca²⁺

c) enhanced blood glucose

d) enhanced blood Ca²⁺