What are diuresis, the significance of insect uric acid excretion, differences between maize and beans, and common phylum features in specimens?

12.

a) What is diuresis?
Diuresis is the increased production of urine by the kidneys, leading to increased urination.

b) What is the biological significance of an insect excreting uric acid?
The biological significance of insects excreting uric acid is water conservation. Uric acid is a solid, insoluble waste product that requires very little water for its excretion, which is crucial for insects living in dry environments.

13. Study and complete the table below.

Feature	Maize (Monocot)	Bean (Dicot)
a) Number of stamens	Usually in multiples of three	Usually in multiples of four or five
b) Arrangement of vascular bundle in stem	Scattered	Arranged in a ring
c) Type of root	Fibrous root system	Taproot system

14. The diagrams below show animals in study during classification.

a) Mention two observable structural features in these specimen that suggest that they have a common phylum.

• Exoskeleton
• Segmented body
• Jointed appendages