What do bacteria in root nodules derive from the host plant?
Protection and minerals
Water and minerals
Carbonhydrates and water
Protection and carbohydrates
Correct answer is A
No explanation has been provided for this answer.
An acidic soil can be improved upon by
sedimentation
leaching
flocculation
watering
Correct answer is C
No explanation has been provided for this answer.
Which of the following constitute pollution?
Droppings from birds
loud disco sound
A pack of cigarettes
Refuse in an incinerator
Correct answer is B
No explanation has been provided for this answer.
What set of diseases is spread mainly by insect vectors?
Cholera, tenia, and ghonorrhoea
Poliomyelitis, tuberculosis, and syphilis
Cholera, malaria, and tuberculosis
Malaria, cholera, and river blindness
Correct answer is D
No explanation has been provided for this answer.
Physiological adaptation to very dry condition in animals is called
hibernation
aestivation
rejuvenation
xeromorphism
Correct answer is B
No explanation has been provided for this answer.