Question
Which feature helps a xerophyte survive in its environment?
A flat leaves with a large surface area
B no cuticle
C short roots
D sunken stomata
Answer/Explanation
Ans
D
Question
Some plants have small leaves with thick waxy cuticles.
Which row describes the effect of these features on water loss and the type of plant that has
these features?
Answer/Explanation
Ans
B
Question
Why is the allele for sickle-cell anaemia common in some parts of the world?
A Malaria protects against sickle-cell anaemia.
B Sickle-cell anaemia is caused by malaria.
C Sickle-cell anaemia is transmitted by mosquitoes.
D The sickle-cell anaemia allele protects against malaria.
Answer/Explanation
Ans: D
Question
Which statement describes how a species becomes adapted to its environment?
A Genetic similarities give rise to different genotypes which may have a reproductive
advantage.
B Genetic variation gives rise to different phenotypes which may have a reproductive
advantage.
C Phenotypic similarities give rise to different genotypes which may have a reproductive
advantage.
D Phenotypic variation gives rise to different phenotypes which may have a reproductive
advantage.
Answer/Explanation
Ans: B