Biology Mock 2023

Question 1 of 50

Cactus leaves are reduced to spines mainly to

Question 2 of 50

A typical feature of the savannah is

Question 3 of 50

Fish are adapted for breathing in water by having

Question 4 of 50

A vaccine usually contains

Question 5 of 50

Bread dough rises because yeast

Question 6 of 50

Charles Darwin explained evolution by

Question 7 of 50

Fossils provide evidence for evolution because they

Question 8 of 50

A human sperm cell contains how many chromosomes?

Question 9 of 50

The tadpole of a frog changes into an adult through

Question 10 of 50

COVID-19 is caused by

Question 11 of 50

Adrenaline prepares the body for

Question 12 of 50

The male sex hormone produced by the testes is

Question 13 of 50

Growing new cassava plants from stem cuttings is an example of

Question 14 of 50

Which organelle carries out photosynthesis?

Question 15 of 50

Plants such as orchids that grow on other plants to reach light in a rainforest are

Question 16 of 50

Injecting ready-made antibodies, such as antivenom after a snakebite, gives

Question 17 of 50

The BCG vaccine protects against

Question 18 of 50

Growing many identical plants from small pieces of tissue in a sterile nutrient medium is

Question 19 of 50

Human insulin for diabetics is now produced by bacteria using

Question 20 of 50

In treating drinking water, alum is added mainly to

Question 21 of 50

Mendel's first law, the law of segregation, states that

Question 22 of 50

A monohybrid cross between two heterozygous tall plants (Tt × Tt) gives a phenotype ratio of

Question 23 of 50

Height in humans is an example of

Question 24 of 50

Which is an example of discontinuous variation?

Question 25 of 50

Mitosis produces

Question 26 of 50

Meiosis produces

Question 27 of 50

The lateral line of a tilapia helps it to

Question 28 of 50

The wall gecko can walk on walls and ceilings because of

Question 29 of 50

In the domestic fowl, food is ground up in the

Question 30 of 50

A disease that passes from animals to humans, such as Ebola, is called

Question 31 of 50

The hormone that lowers blood sugar is

Question 32 of 50

A freely movable joint such as the knee, lubricated by a fluid, is a

Question 33 of 50

Breathing in happens when the diaphragm

Question 34 of 50

Insect-pollinated flowers usually have

Question 35 of 50

Ginger reproduces naturally by means of

Question 36 of 50

Complete metamorphosis involves the stages

Question 37 of 50

Insects breathe through

Question 38 of 50

Xerophytes reduce water loss by having

Question 39 of 50

A booster dose of a vaccine is given to

Question 40 of 50

The development of antibiotic resistance in bacteria is an example of

Question 41 of 50

The frog can breathe through its skin because the skin is

Question 42 of 50

The swim bladder in bony fish helps to

Question 43 of 50

A person 1.6 m tall weighing 64 kg has a BMI of

Question 44 of 50

Restriction enzymes in genetic engineering are used to

Question 45 of 50

A woman who is a carrier of haemophilia marries a normal man. The probability that a son will be haemophiliac is

Question 46 of 50

Two parents with blood groups A and B have a child of group O. The parents' genotypes must be

Question 47 of 50

Industrial melanism in the peppered moth shows

Question 48 of 50

The stage of meiosis when homologous chromosomes pair and cross over is

Question 49 of 50

Negative feedback in blood glucose control means that

Question 50 of 50

The loop of Henle is longest in mammals that live in