Transportation in Animals and Plants — Practice

Question 1

List the components of blood and their functions.

Accepted Answer

Plasma (carries nutrients, hormones, waste), RBCs (carry oxygen via haemoglobin), WBCs (fight infections), platelets (help blood clot).

Question 2

What is the function of haemoglobin?

Accepted Answer

Haemoglobin in RBCs binds with oxygen and transports it to all body cells; it also gives blood its red colour.

Question 3

Distinguish between xylem and phloem.

Accepted Answer

Xylem is made of dead cells and transports water and minerals upward from the roots. Phloem is made of living cells and transports food from the leaves to all parts of the plant.

Question 4

What is transpiration? Why is it important for plants?

Accepted Answer

Transpiration is the loss of water vapour from leaves through stomata. It creates a transpiration pull that draws water up the xylem, helps cool the plant, and aids mineral absorption.

Question 5

What would happen if there were no valves in veins?

Accepted Answer

Blood in veins flows against gravity towards the heart. Without valves, blood would flow backward and pool in the lower body, failing to return efficiently to the heart.

Practice — Transportation in Animals and Plants

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