In a group of male Agama lizards, the one with the brightest head colour is the
dominant
youngest
oldest
largest
Correct answer is A
No explanation has been provided for this answer.
The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain?
animal rather than plant remains
invertebrates rather than birds
flowering plants rather than mosses
reptiles rather than fishes
Correct answer is B
No explanation has been provided for this answer.
Blood grouping in human beings is derived from combinations of
two different alleles
four different alleles
three different alleles
two different genes
Correct answer is C
The four main blood groups A, B, AB, and O are controlled by three alleles: A, B, and O.
The surest way to combine the best qualities of both parents in the offspring is by
cross-breeding
inbreeding
selective breeding
pure breeding
Correct answer is A
No explanation has been provided for this answer.
The pollutants that contribute to the depletion of the ozone layer in the atmosphere are
radioactive materials
oxides of sulphur
oxides of carbon
chlorofluorocarbons
Correct answer is D
No explanation has been provided for this answer.