In man, sex is determined by the inheritance of
a pair of homologous chromosomes
an extra chromosome in the cells of a female
a dominant gene for maleness present in man
two similar X chromosomes in the female and X and Y chromosomes in the male
Correct answer is D
No explanation has been provided for this answer.
The ability of some individuals to taste phenylthiocarbamide (PTC) is a
morphological adaptation
morphological variation
physiological adaptation
physiological variation
Correct answer is D
No explanation has been provided for this answer.
Which of these physiological variations is sex-linked?
albinism
blood groups
sickle-cell anaemia
haemophilic condition
Correct answer is D
No explanation has been provided for this answer.
Tropical rain forests can be conserved by the following practices except?
agroforestry
deforestation
shifting cultivation
crop rotation
Correct answer is B
Deforestation leads to a huge loss of biodiversity. About 80% of the global biodiversity is located in tropical rainforests.
Use of powerful tools for felling trees
regrowing of forest trees
clearance of forests for cash crops
use of fire or hunting in forests
Correct answer is B
No explanation has been provided for this answer.