Flatworms and roundworms are said to be invertebrates because?

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?

Which of the following is TRUE of the process of conjugation in Paramecium?

I. Stomata --> Spirogyra
II. Alveoli --> Earthworm
III. Malpighian tubule -> Mammal
IV. Contractile vacuole -> Protozoa
Which of the above structures is correctly matched with the organisms in which it is found?

I. Rattus rattus. Il. Agama agama III. Bufo regularis IV. Tilapia zillii
The order of evolutionary advancement of the above vertebrates is?

Which of the following is NOT regarded as a pollutant on land or in the air?

The two key cations involved in the action potential of nervous transmissions are?

In demonstrating the importance of mineral elements in plants, the culture bottle must be
darkened to?

Which of the statements below is not characteristic of wind-pollinated flowers?

Which of the following is true in blood transfusion?

When the original king and queen of termites die, they are replaced by

I. High birth rate and high immigration rate
II. Low birth rate and high immigration rate
III. Low mortality rate and low emigration rate
IV. High mortality rate and high emigration rate.
Which combination of the above can cause rapid over-crowding in climax biotic communities

One of the functions of the xylem is?

Some of the features of an animal are scales, teeth, nares, and backbone. The animal is likely to be a?

The villus in the small intestine is significant because it?

If both parents are heterozygous for a trait. the probability that an offspring will be recessive for
that trait is?

A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?

People who suck petrol with their mouths run the risk of increasing in their blood the
concentration of

In the mammalian respiratory system. exchange of gases occurs in the?

When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a
short period because?

The correct sequence of the movement of urea during urine formation is?

If a DNA strand has a base sequence TCA, its complementary strand must be?

The movement of part of a plant in response to external stimulus of no particular direction is?

Aged erythrocytes are destroyed in the?

The sequence of the one-way gaseous exchange mechanism in a fish is?

When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it?

The most abundant group of organisms in the animal kingdom?

Blood circulation in a mammal is said to be double because?

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?

The blood vessel which carries blood from the alimentary canal to the liver is the?

The order of passage of food in the digestive system is

Choose the sequence which represents the correct order of organisms in a food chain

Which of the following produces both hormones and enzymes?

Which of the following is a measure for the control of bilharzia?

Which of the following food substances will produce a brick-red colour when warmed with
Benedict's solution?

The mutation theory of organic evolution was propounded by?

Mass of a crucible = 10g,
Mass of a crucible and soil before heating =29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?

The correct sequence for the perception of smell in mammals is?

The appendicular skeleton is composed of the pectoral girdle?

The plants that grow in deserts or very dry areas are referred to as?