Which of the following elements are necessary for the formation of chlorophyll in a plant?
magnesium and iron
Calcium and potassium
Calcium and sulphur
Potasium and sulphur
Phosphorus and potassium
Correct answer is A
No explanation has been provided for this answer.
If an organic compound has its hydrogen: oxygen ratio as 2:1, it is likely to be
a protein
a cabohydrate
a fat
a fatty acid and glycerol
an amino acid
Correct answer is B
No explanation has been provided for this answer.
Which of the following is not associated with excretion in mammals
Glomerulus
Urea
Faeces
Carbon Dioxide
Bowman's capsule
Correct answer is C
No explanation has been provided for this answer.
A feature which adapts birds to flight is the possession of
scaly legs
light bones
two walking legs
a pointed beak
Correct answer is B
No explanation has been provided for this answer.
Herbs differ from shrubs because they
do not produce fruit
are useful to herbalist
do not become woody
are only annual
are only perennials
Correct answer is C
No explanation has been provided for this answer.