1Fill in the blanks with the right word from this set: energy, photosynthesis, digestive system, chlorophyll, digestive gland. (a) The process by which a plant makes food is called ......... . (b) A leaf looks green because of the presence of ......... in it. (c) The group of organs that helps digest food is called the ......... . (d) The carbohydrate in food gives us ......... .
2Write the definition of a life process.
3Write down the things that photosynthesis needs.
4Write in points how the starch test is carried out.
5Can a plant carry out photosynthesis at night? Give your reasoning.
6Explain clearly what the digestive system is.
7Describe the part played by the digestive juices in the digestive system.
8Draw a clean diagram of the human digestive system and name its different parts.
9Write the name and the work of each of these organs and parts: (a) the stomach, (b) the small intestine, (c) the leaf.
10Write four differences between autotrophic and heterotrophic organisms.
11Tell endoparasites and ectoparasites apart, and give two examples of each.
12Why can a mushroom not make its own food, and where does it get food from?
13In the starch test, why is the leaf stood in alcohol?
14What work does the large intestine do?