Question 1
Name the branch of Biology that involves the study of:
a) Organisms for the sake of classifying them.
b) Microscopic organisms
Answer
(a) Taxonomy;
(b) Microbiology
(b) Microbiology
Question 2.
The diagram below represents a plant
a) Name the division to which the plant belongs.
b) Give three reasons for your answer in (a) above.
Answer
(a) Pteridophyta;
(b) Presence of sori; rhizome; fronds;
(b) Presence of sori; rhizome; fronds;
Question 3
State three parameters that can be used to estimate growth in seedlings.
Answer
- Surface area of leaves;
- height/length;
- dry weight / mass
- height/length;
- dry weight / mass
Question 4
Equal amounts of crushed Irish potato was placed in equal volumes of hydrogen peroxide solution at indicated pH. The volume of the gas produced was measured and recorded as shown in the table below.
(a) Name the gas that was produced.
(b) Account for the difference in the volume of the gas produced in pH 4.0 and pH 9.0
Answer
(a) Oxygen;
(b) More gas / oxygen produced at PH 9.0 than PH 9.0 4.0; PH 9.0 is optimum / suitable for the activity of catalase;
(b) More gas / oxygen produced at PH 9.0 than PH 9.0 4.0; PH 9.0 is optimum / suitable for the activity of catalase;
Question 5
The diagram below shows a longitudinal section of mammalian skin.
a) Name the parts labelled F and G.
b) State one function of each of the parts labelled H and J
Answer
(a) F - cornified layer
G - malpighian layer
(b) H - contracts or relaxes to alter / change the position of the hair on the skin;
J - insulates against heat loss;
G - malpighian layer
(b) H - contracts or relaxes to alter / change the position of the hair on the skin;
J - insulates against heat loss;