Which of the statements below is not characteristic of wind-pollinated flowers?
Answer
(C)
The pollen grains have rough spiny surfaces
3
Some of the features of an animal are scales, teeth, nares, and backbone. The animal is likely to be a?
Answer
(C)
lizard
4
Choose the sequence which represents the correct order of organisms in a food chain
Answer
(B)
Grass, grasshopper, toad, snake, hawk
5
Flatworms and roundworms are said to be invertebrates because?
Answer
(D)
they have no backbones
6
When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it?
Answer
(D)
loses water and shrivels
7
Which of the following is NOT regarded as a pollutant on land or in the air?
Answer
(B)
Nitrogen
8
The initial volume of water poured into a bag of dry soil was 50ml and the amount that drained through was 35mI. The percentage water content of the fully soaked soil is therefore?
Answer
(D)
30.0
9
When the original king and queen of termites die, they are replaced by
Answer
(D)
developing nymphs nurtured as secondary reproductives
10
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to?
Answer
(A)
prevent algal growth in culture solution
11
In the mammalian respiratory system. exchange of gases occurs in the?
Answer
(D)
alveoli
12
Aged erythrocytes are destroyed in the?
Answer
(B)
liver
13
The villus in the small intestine is significant because it?
Answer
(A)
increases the surface area for absorption
14
Which of the following food substances will produce a brick-red colour when warmed with Benedict's solution?
Answer
(A)
Glucose
15
The blood vessel which carries blood from the alimentary canal to the liver is the?
Answer
(C)
hepatic portal vein
16
Which of the following is TRUE of the process of conjugation in Paramecium?
Answer
(D)
Each micronucleus divides twice
17
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
Answer
(B)
lead
18
Which of the following is a measure for the control of bilharzia?
Answer
(B)
Application of molluscicides in water bodies
19
The appendicular skeleton is composed of the pectoral girdle?
Answer
(A)
pelvic girdle, fore and hind limbs
20
A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?
Answer
(A)
aerenchyma tissues
21
The correct sequence for the perception of smell in mammals is?
Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?
Answer
(B)
I and III
23
The number of plant species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomoea spp (5), Sida spp (7) and Imperata spp (23)
What is the percentage of occurrence of Imperata spp?
Answer
(C)
46%
24
When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a short period because?
Answer
(B)
the body cells of the fish swelled and burst as a result of the hypotonic fresh water
25
If a DNA strand has a base sequence TCA, its complementary strand must be?
Answer
(D)
AGT
26
The two key cations involved in the action potential of nervous transmissions are?
Answer
(C)
Na+ and K+
27
I. Rattus rattus. Il. Agama agama III. Bufo regularis IV. Tilapia zillii
The order of evolutionary advancement of the above vertebrates is?
Answer
(D)
IV, III, II, I
28
Which of the following produces both hormones and enzymes?
Answer
(B)
Pancreas
29
The correct sequence of the movement of urea during urine formation is?
