Question 1
The diagram below represents an organism. Study it and answer the questions that follow.
- Identify the kingdom to which the organism belongs.
- Name the structures labelled X
- Identify the type of nutrition carried out by the organism and give a reason
Answer
- Protoctista / Protista
- Flagellum
- Nutrition - Autotrophic
Reason: Presence of chloroplast
Question 2
State the phylum where all members have open circulatory system.
Answer
Arthropoda
Question 3
State advantages of closed circulatory system over open circulatory system.
Answer
Blood circulates over longer distance of a faster rate due to high pressure. Animals tend to be more active due to effective transport of gases. Oxygenetaed and deoxygenated blood do not mix.
Question 4
Explain why malaria cannot be transmitted through blood transfusion.
Answer
It is a vector disease. Parasite are transmitted from an infected individual to a healthy one throuhg the female anopheles mosquito.
Question 5
A boy held a locust upside down and attempted to drown it, by immersing the head in water. Explain the observation made.
Answer
The locust did not drown. Spiracles used for gaseous exchange are located on the abdomen and thorax, no spiracles on the head.