The failure of transport and respiratory systems in plants as well as the presence of reddish colour in stems and leaves result from the deficiency of

A. magnesium

B. nitrogen

C. potassium

D. phosphorus

The dental formula 13/3 c1/1 pm4/4 m2/3 is that of a

A. goat

B. rabbit

C. man

D. dog

The nitrifying bacteria, Nitrosomonas, convert ammonia to

A. nitirites

B. nitric acid

C. niitrates

D. nitrous oxide

The activity of ptyalin is likely to decrease with an increase in concentration of

A. oxygen

B. starch

C. protein

D. acid

The phloem parenchyma is sometimes used for

A. food storage

B. supporting the stem

C. production of the sieve tube

D. transporting water

The process by which a red blood cell placed in distilled water absorbs water until it burst and releases its contents into the surrounding is known as

A. osmosis

B. plasmolysis

C. turgidity

D. haemolysis

The most appropriate title for the set up is

A. quantitative measurement of respiration in plants and animals

B. measurement of respiratory rates in living organisms

C. comparison between photosynthesis and respiration

D. comparison of respiratory rates in plants and animals

The part labelled j is called

A. porosimeter

B. potometer

C. manometer

D. auxanometer

A circulatory system that does not allow mixing of oxygenated and de-oxygenated blood in mammalian heart is referred to as

A. open

B. haemocoelic

C. single

D. closed

Which of the following waste products in plants is excreted through the stomata and lenticels?

A. Carbondioxide

B. Alkaloids

C. Tannins

D. Anthocyanins