Lungs hooks are used for respiration in

A. spiders

B. insects

C. millipedes

D. snails

Insects and millipede have many features in common EXCEPT

A. exoskeleton

B. jointed appendages

C. compound eyes

D. segmented body

The major function of the swim-bladder in fishes is

A. breathing

B. buoyancy

C. swimming

D. diving

Which of the following statements gives the BEST description of bark?

A. Tissue outside the vascular cambium

B. Cork-like tissue found only in stems

C. Brown tissue never found in primary growth

D. Cork-like tissues of old trees

In the transverse section of the leaf of maize vascular bundles are arranged in

A. a row

B. one circle

C. alternate position

D. two circles

If an animal has diastema, it would NOT posses

A. incissors

B. cannines

C. premolars

D. molars

If the gall bladder of a mammal is damaged, which of the following will be most seriously affected?

A. Glycolysis

B. Digestion of starch

C. Digestion of fats and oil

D. Digestion of proteins

Which of the following will be first digested if ingested at the same time?

A. Cooked beans

B. Cooked rice

C. cod liver oil

D. Roasted beef

If the phloem of a healthy plant is killed by heat treatment the

A. the upward movement of salt will cease

B. food manufactured in the leaves will accumulate

C. whole plant will die immediately

D. leaves of the plant will become yellow

In the mammalian respiratory system, exchange of gases occurs in the

A. lungs

B. bronchi

C. bronchioles

D. alveoli