Question 1
State the functions of the followings apparatus in collecting and observing specimens
a) Pooter
b) A bait trap
c) Pit fall trap
Answer
a) Pooter - Used for sucking small animals from rock surfaces or bark of trees.
b) Bait trap - For attracting and trapping small animals e.g rats.
b) Pit fall trap - For catching crawling animals e.g. millipedes.
b) Bait trap - For attracting and trapping small animals e.g rats.
b) Pit fall trap - For catching crawling animals e.g. millipedes.
Question 2
How does growth as a characteristic of living organisms differ in plants and animals?
Answer
In plants growth occurs at meristematic tissues only while in animals growth occurs all over the body.
Question 3
Illustrated below is the movement of material in a certain physiological process
a) Name the physiological process illustrated above
b) Give two examples of applicability of the process named in (a) above in plants.
c) State two ways by which the movement of the dye molecules would be slowed down.
Answer
a) Diffusion
b) - Gaseous exchange
- Translocation of manufactured food in the phloem
c) - Lowering the temperature of the medium
- Increasing thickness of the membrane
b) - Gaseous exchange
- Translocation of manufactured food in the phloem
c) - Lowering the temperature of the medium
- Increasing thickness of the membrane
Question 4
Define the following terms in relation to a cell.
a) Isotonic solution
b) Hypotonic solution
c) Hypertonic solution
Answer
a) Isotonic solution - A solution which has the same (solute) concentration as the cell sap.
b) Hypotonic solution - A solution which is less (solute) concentrated than the cell sap.
c) Hypertonic solution - A solution which is more (solute) concentrated than the cell sap.
b) Hypotonic solution - A solution which is less (solute) concentrated than the cell sap.
c) Hypertonic solution - A solution which is more (solute) concentrated than the cell sap.
Question 5
Give the difference between transpiration and guttation.
Answer
| Transpiration | Guttation |
|---|---|
| - Loss of water in form of water vapour | - Loss of water in form of droplets |
| - Water vapour lost through the stomata | - Water droplets lost through hydathodes |