An association between the root nodule of a leguminous plant and rhizobium sp, is known as
commmensalism
mycorrhiza
parasitism
symbiosis
Correct answer is D
No explanation has been provided for this answer.
Which of the following structural features are adapted for uses other than water conservation?
Succulent stems
Scales in animals
Spines in plants
Feathers in birds
Correct answer is A
No explanation has been provided for this answer.
Complex social behaviour and organization are found mostly in
insects
birds
reptiles
mammals
Correct answer is D
No explanation has been provided for this answer.
grasshopper is getting older
environmental temperature is changing
grasshopper is avoiding predation
grasshopper is frequently moulting
Correct answer is C
No explanation has been provided for this answer.
Examples of water-borne and sex linked diseases are?
taeniasis and malaria
cholera and gonorrhoea
typhoid and syphilis
dracunculiasis and haemophilia
Correct answer is D
Dracunculiasis, also called Guinea-worm disease, is a parasitic infection by the Guinea worm, Dracunculus medinensis. A person becomes infected from drinking water that contains water fleas infected with guinea worm larvae.
Some of the more familiar sex-linked traits are hemophilia, red-green color blindness, congenital night blindness, some high blood pressure genes, Duchenne muscular dystrophy, and Fragile X syndrome.