Question 1
Answer
-
- Specimen Q
Stem tuber - Reason.
Presence of scale leaf and burd
- Specimen Q
-
- Observations.
A - Slow evolution of bubbles;
B - Fast evolution of bubbles - Account for result (b) (i) above. Potatoe cube in A has a small surface area for action of enzyme catalase; Crushed potatoe cube in B has a large surface area for action of enzyme catalase
- Observations.
-
Question 2
Answer
- From a carnivore
A
Reason
Sharp and pointed for tearing flesh from bones;
From herbivore
B
Reason
Has cusp for chewing and grinding -
Type B
Pre-molar or molar; Reason
-Has three roots
-Has cusps and large surface area for chewing and grinding
Functions of pre-molar or molar -
Difference between homodont and heterodont teeth
Pre-molar or molar
-Homodont type are similar in shape and size while heterodont are different in size and shape -
General adaptation and functions of teeth
-Long to piece through flesh
-Sharp to tear flesh from bones
Pre-molar or molar
Reason
-Sharp cusps; and wide surface for chewing and grinding