Q.5 Answer the following questions!
1. The pores through which leaves exchange gases
2. Which part of the plant take in carbon dioxide from the air for photosynthesis?
3. Which material is not digested by human?
4. How many premolar teeth found in mouth?
5. Which insects produces silk?
Q.6 Answer the following question in brief:
3 Mark's Each
1. Distinguish between a parasite and a saprotroph.
2. What is saliva and how is it useful in the process of digestion?
3. What are milk teeth and permanent teeth?
4 Mark's Ea
Q.7 Answer the following question in detail.
1.1f all the plants steps performing photosynthesis process explain. what will happen?
2. Name for kinds of teeth in our mouth, what are their function?
3 Marks
Q.8 Draw the figure of any one.
Amoeba, Life history of silk moth (life cycle)
Answers
1. Stomata
2. Leaves
3. Cellulose
4. Eight
5. Silkworm
Q6.
1. Parasites are organisms that depend upon another organism (host) for food and cause harmful effects or dieseases to the host. Examples: Cuscuta (Amarbel), mosquitoes and head lice. While as Saprotrophs are orgnisms that obtain nutrition from dead and decaying organic matter. Examples: Fungi and some bacteria.
2. Saliva, the watery liquid produced by glands located under the tongue, is an essential component of the digestive process. Saliva is 98% water, so it moistens the mouth and helps compact food into softened particles for easier swallowing.
3. Deciduous teeth – commonly known as baby teeth, milk teeth, temporary teeth, and primary teeth – are the first set of teeth in the growth development of humans and other diphyodont mammals. They develop during the embryonic stage of development and erupt (that is, they become visible in the mouth) during infancy. While as permanent dentition is comprised of 32 teeth. There are 16 teeth in the maxilla and 16 in the mandible. In each arch there are two central incisors, two lateral incisors, two canines, four premolars, and six molars.