Question 1:
How can variation increase the survival of species?
How can variation increase the survival of species?
Answer:
An organism in a population that has variation possesses characteristic which is adaptable to the environment compared to other organisms within the same population which do not have the variation.
Question 2:
Determine the following variations:
(a) Intelligence
(b) Presence of dimples
(c) Type of hair
(d) Height
(e) Type of earlobes
Determine the following variations:
(a) Intelligence
(b) Presence of dimples
(c) Type of hair
(d) Height
(e) Type of earlobes
Answer:
Question 3:
State two causes of variation.
State two causes of variation.
Answer:
Genetic factor and environmental factor
Question 4:
Variation occurs because of sexual reproduction
Variation occurs because of sexual reproduction
Explain the above statement.
Answer:
Sexual reproduction involves fertilisation between male gamete and female gamete.
During formation of gamete, cross-linking occurs between homologous chromosomes.
Fertilisation between two types of gametes occurs randomly which causes variation in the offspring produced.