How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
The steps below are involved in the testing of a leaf for starch. Study them carefully and answer the question:
I. Decolorize them
II. Dip decolorized leaf in warm water
III. Place leaf in boiling water
IV. Add iodine solution
The best time to pluck the leaf for the experiment is?
after being exposed to sunlight
three hours after sunset
before sunrise
six hours after sunset
Correct answer is A
The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch.
The best time to pluck the leaf for the experiment is
after being exposed to sunlight
three hours after sunset
before sunrise
six hours after sunset
Correct answer is A
No explanation has been provided for this answer.
The steps below are involved in the testing of a leaf for starch. Study them carefully and answer the question:
I. Decolorize them
II. Dip decolorized leaf in warm water
III. Place leaf in boiling water
IV. Add iodine solution
The CORRECT order for the test is?
I, II, III and IV
I, III, II and IV
II, III,, I and IV
III, I, II and IV
Correct answer is D
No explanation has been provided for this answer.
Which of the following parts of the ear does NOT contain endolymph?
Semi-circular canals
Utriculus
Tympanum
Sacculus
Correct answer is A
No explanation has been provided for this answer.
Which of the following actions is NOT a voluntary action?
Stealing
Sneezing
Fighting
Cheating
Correct answer is B
No explanation has been provided for this answer.