Describe the characteristic features, functions of parts, adaptations to life, and economic importance of animals.

Here are the answers to question 1 from the image:

1. a) What characteristic features do birds and mammals have in common?
Birds and mammals are both endothermic (warm-blooded), meaning they can regulate their own body temperature. They both possess a four-chambered heart for efficient blood circulation and exhibit parental care for their young.

1. b) State the functions of:

• i. Vagina: The vagina serves as the birth canal during childbirth, receives the penis during sexual intercourse, and is the exit for menstrual flow.
• ii. Breast: The breast's primary function is lactation, which is the production and secretion of milk to nourish offspring.
• iii. Testis in mammals: The testes are responsible for spermatogenesis (the production of sperm) and the synthesis of male hormones, such as testosterone.

1. c) How is the Tilapia fish adapted to life in water?
Tilapia fish are adapted to aquatic life with a streamlined body shape for efficient movement, gills for respiration (extracting oxygen from water), and fins for propulsion, steering, and balance. They also have scales for protection and a lateral line system to detect vibrations and pressure changes in the water.

1. d) Describe the economic importance of insects.
Insects have significant economic importance. They are crucial pollinators for many crops, contributing to food production. Some insects produce valuable products like honey (bees) and silk (silkworms). However, insects can also be economically detrimental as pests that destroy crops and stored food, and as vectors that transmit diseases to humans and livestock.