Respiration in Animals and Plants — BIOLOGY STD 7 — Question

What are voluntary and involuntary actions? Which part of the nervous system controls them?

How do you test for :
The role of chlorophyll in photosynthesis.

What are the characteristics of pteridophytes?

Differentiate between
Algae and fungi

Take some boiled potatoes, french fries, baked ‘ potatoes and potato chips. Rub a small amount of each of these on a brown paper. Write the name of \ each item below the spot you rubbed. Wait for five minutes for the spot to dry. Hold the paper towards light and record your observation. Which type of potatoes contain fat ? If you are on a low fat diet, which type of potatoes would you eat ? Why?

Draw the diagram of a ball and socket joint.

How do skin and lungs help in excretion ?

In the mouth grinding of food is brought about by 1 and 2. The saliva contains 3 enzyme. The food then passes to stomach through pharynx and 4. Peristalsis of food is caused by 5. In the stomach, pepsin acts on proteins to change them into 6 and 7. Bile is secreted by 8. In duodenum, pancreatic juice has 9 and 10 enzymes. Lipase acts on fats and converts them into 11 and 12.

Write the overall chemical equations of the two kinds of respiration in plants.
(i) Aerobic:
(ii) Anaerobic:

Define the following:
connective tissue