Active transport can be defined as the movement of
substances from a region of high concentration to a region of low concentration
substances from a region of low concentration to a region of high concentration across a living cell membrane
substances across a living cell membrane using energy from the cell
movement of molecules in a medium
Correct answer is B
No explanation has been provided for this answer.
Which of the following organisms is the most specialized?
paramecium
Amoeba
Spirogyra
Rhizopus
Correct answer is D
No explanation has been provided for this answer.
Which of the following organisms exhibit division of labour?
houseflies
butterflies
cockroaches
termites
Correct answer is D
No explanation has been provided for this answer.
each gamete contains only paternal hereditary information
chromosomes contain a random mixture of paternal and maternal chromosomes
chromosomes in the four gamete cells are diploid in number
chromosomes contain only maternal hereditary information
Correct answer is B
No explanation has been provided for this answer.
some were short while others were long
all were long
half of them were long while half were short
three-quarters were long while one quarter were short
Correct answer is B
No explanation has been provided for this answer.