Which of the following blood vessels have valves?
Capillary
Artery
Vein
Arteriole
Correct answer is C
No explanation has been provided for this answer.
Which of these statements about white blood cells is true? They
aid clotting of blood
carry oxygen round the body
are the most numerous blood cells
are large nucleated cells
Correct answer is D
No explanation has been provided for this answer.
The fine adjustment of the light microscope is used to
admit more light into the microscope
focus the object under low power
focus the object under high power
raise the stage upwards
Correct answer is C
No explanation has been provided for this answer.
Which of the following is a renewable natural resource?
Air
Timber
Soil
Mineral
Correct answer is A
No explanation has been provided for this answer.
Which of the following processes is a form of sexual reproduction?
Budding by yeast cells
Conjugation in Spirogyra
Binary fission in Amoeba
Rhizome production by ginger
Correct answer is B
No explanation has been provided for this answer.