Question 1
Insects blood is noted to lack a respiratory pigment. Explain
Answer
Insects blood is not used for transportation of respiratory gases
Question 2.
State the functions of the following parts of a nephron
(i) Loop of Henle
(ii) Distal convoluted tubule
Answer
(i) Reabsorption of H2O from the collecting duct
(ii) Secretion of some drugs
(ii) Secretion of some drugs
Question 3
Most terrestrial plants do not grow well in waterlogged soils. Give a reason for this
Answer
Lack of O2 for respiration
Question 4
The diagrams below show a pair of homologous chromosomes. Study them and answer the questions that follow
(i)State the phenomenon shown above
(ii) What is the genetic significance of the phenomenon above?
Answer
(i) Crossing over
(ii) Variations; which may lead to new genetic fruits either advantages or disadvantages to the organism/may lead to evolution
(ii) Variations; which may lead to new genetic fruits either advantages or disadvantages to the organism/may lead to evolution
Question 5
Give two destinations of food translocated from the leaves of plants
Answer
- Oxidizes to produce energy
- Converted into fats and oils
- Converted into fats and oils