Question 1
Name one factor in nature that increases the process of evolution.
Answer
Natural selection
Question 2.
What is meant by the term “oxygen debt”?
Answer
The extra oxygen; required to break down accumulated lactic acid in muscles; during an activity
Question 3
Differentiate between characteristics of members of Monera and those of Protoctista.
Answer
Members of kingdom monera are prokaryotic /nuclear material not enclosed in nucleus membrane while members of kingdom protoctista are Eukaryotic/Nuclear membrane enclosed by a nuclear membrane;members of kingdom monera have few organelles while members kingdom protostica have of many organelles;
Question 4
Study the structure drawn below and answer the question that follows
(a) Name the organelle drawn above
(b) State the function of the structure labelled A.
Answer
(a) Rough endoplasmic reticulum;
(b) Site for protein synthesis;
(b) Site for protein synthesis;
Question 5
In an experiment, the pituitary gland of a rat was removed.
(a) State the effect that will have on the quality of urine produced by the rat.
(b) Give a reason for your answer in (a) above.
Answer
(a) Rat will produce large quantities of dilute urine
(b) ADH which regulate the reabsorption of water in nephrom is secreted by pituitary glands; Hence termination of ADH leads to making nephrons impermeable to water hence a lot of water is lost in urine;
(b) ADH which regulate the reabsorption of water in nephrom is secreted by pituitary glands; Hence termination of ADH leads to making nephrons impermeable to water hence a lot of water is lost in urine;