The bacterium in a mutualistic association with legumes converts
nitrates to ammonia
ammonium compounds to nitrites
nitrogen gas to ammonia
nitrites to nitrates
Correct answer is D
No explanation has been provided for this answer.
pH2
pH7
pH8
pH9
Correct answer is A
No explanation has been provided for this answer.
Which of the following food substances is incorrectly linked to its enzyme?
Protein - trypsin
Fat - lipase
Sucrose - pepsin
Starch - amylase
Correct answer is C
No explanation has been provided for this answer.
In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the
cell walls are hardened
cells are killed
chlorophyll is dissolved out
iodine will penetrate
Correct answer is B
No explanation has been provided for this answer.
A man suffering from obesity must avoid meals containing
margarine and butter
rice and beans
carrots and oranges
beef and fish
Correct answer is A
No explanation has been provided for this answer.