Question

5 animal n stays in its hard shell when resting. it extends itself from its shell when feeding.
(a) how does animal n protect itself from predators? 1
(b) animal n attaches itself to underwater surfaces of ships and gets carried to other places without using much energy.
how does being carried to other places benefit animal n? 1
(c) tiny green plants can also attach themselves to underwater surfaces of ships.
scientists observed that ships with many tiny green plants have fewer animal n attached to them. give a reason for this observation. 1

Explanation:

Protection mechanism of Animal N

Animal N retreats and stays completely inside its hard shell when resting or threatened, which prevents predators from reaching its soft body parts.

Benefits of dispersal via ships

Being carried to other places allows Animal N to colonize new habitats, reduce competition for food and space with its parents or other offspring, and find more abundant resources.

Competition between plants and Animal N

Both tiny green plants and Animal N compete for the limited space on the underwater surfaces of the ships to attach themselves. When there are many tiny green plants, they occupy most of the available space, leaving less space for Animal N to attach.

Answer:

Question 5(a)

It retreats and stays inside its hard shell to prevent predators from reaching its soft body.

Question 5(b)

It helps Animal N disperse to new areas to find more food and reduce competition for space and resources with its parents or other offspring.

Question 5(c)

The tiny green plants compete with Animal N for space to attach to the underwater surface of the ship.