Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

What happens to the respiratory process in a man going up a hill?

We know that photosynthesis is the only means because of which we get food. Here are two suggestions to increase the availability of food for human beings. Which of them is good and why?

1. We should replace all plants with those plants from which we get food.
2. We should maintain the diversity of plant species because all plants are To important for us.

Write a brief account of mosses.

Distinguish between chloroplast arid chromoplast (any three).

In a given habitat we have 20 plant species and 20 animal species. Should we call this as ‘diversity’ or ‘biodiversity’? Justify your answer.

Why is conduction in a nerve called on the electric phenomenon?

Draw a diagram of alimentary canal of cockroach and label any six parts in it. (Description is not required)

How is expiration carried out under normal physiological conditions?

Raju has recently joined the gym. The very first day, while doing exercise, he felt increased rate of respiration, heartbeat, sweating, etc. He got worried as he experienced the sudden changes in his body. He discussed it with his brother who is a biology student. His brother smiled and explained him that these are the normal activities of the organs/ organ systems that occur during exercise for the maintenance of normal physiology of the human body.

1. Name the processes that are necessary for maintaining normal physiology of the human body.
2. Define coordination and integration.
3. Explain the functions of various organs of the by body that are coordinated and integrated during exercise.
4. What values did Raju's brother possess?