The animal which eats both plants and other animals is called $.......... :$

What will happen to the rate of photosynthesis in a plant under the following circumstances?
$(i)$ Cloudy day in the morning but bright sunshine in the afternoon.
(ii) No rainfall in the area for a considerable time.
(iii) Gathering of dust on the leaves.

How do villi increase the surface area for absorption in the small intestine?

Which is the correct sequence of parts in the human alimentary canal?

$(a)$ Draw a diagram of the human alimentary canal and label the following: gall bladder, pancreas, liver, and small intestine.
$(b)$ Give two reasons to explain why the absorption of digested food occurs mainly in the small intestine.

Name the pigment which can absorb solar energy.