Name the five steps which occur in the process of nutrition in animals.

Define a nutrient. Name four important nutrients present in our food.

A plant is kept in the dark for two days to destarch its leaves. A leaf is then used in an experiment to investigate the effect of light and carbon dioxide on photosynthesis. Part $Q$ of the leaf is exposed to sunlight and air, while part $R$ is covered with black paper (blocking light). What are the colours of $Q$ and $R$ when the leaf is tested for starch using iodine solution?

$(i)$ Which simple food is prepared first in the process of photosynthesis?
(ii) Name the food which gets stored in plants.

What are the functions of gastric glands present in the wall of the stomach?

Why do carnivores have a shorter small intestine?