Question

2(a) Complete the table by ticking (✓) the appropriate group to which each of the listed elements required by plants belongs (microelement or macroelement): Hydrogen, Copper, Magnesium, Zinc, Phosphorus, Manganese, Boron, Nitrogen, Carbon, Oxygen.
(b) State: (i) three differences between the dentition of a herbivore and a carnivore; (ii) four differences between the dentition of a human and a goat.
(c) What are milk teeth?

Accepted Answer

(a) Completed table:
Macroelements: Hydrogen, Magnesium, Phosphorus, Nitrogen, Carbon, Oxygen.
Microelements: Copper, Zinc, Manganese, Boron.

(b)(i) Differences between dentition of herbivore and carnivore:
Herbivore | Carnivore
- Teeth suited to cutting, gnawing and biting | Teeth suited to catching, killing and tearing the prey
- Lack canine teeth | Have canine teeth
- Have diastema | Lack diastema
- Have flat teeth | Have pointed teeth

(ii) Differences between dentition of human and goat:
Human | Goat
- Lack diastema | Have diastema
- Have canine | Lack canine
- Have incisors on both upper and lower jaws | Lack incisors on the upper jaw (only have on the lower jaw)
- Have dental pads | Lack dental pads

(c) Milk teeth are the first set of teeth in the growth and development of humans. These teeth are twenty in number. They are later replaced by the permanent teeth.

WAEC Biology 2022 Theory — Question 2

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