PART - 2 - Unit V : CH - 14 Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

With the help of suitable diagrams describe mitosis.

What are the characteristics of prokaryotic cells?

Draw a diagram of an animal cell and label any ten parts in it.

Describe in detail the hormones secreted by the adrenal gland.

During the biology class, teacher taught that water should be conserved in the body of animals because it is precious and non-renewable in some cases. He asked the student that how the nature conserves water even through the excretory system are present in different organisms.

1. Name three major excretory products of animals.
2. Does loop of Henle play any role in water conservation in humans?
3. Explain excretory organs in different animal groups.
4. What values does the teacher possess?

How far does Selaginella one of the few living members of lycopodiales (pteridophytes) fall short of seed habit.

Is there a species specific or region specific type of plastids? Flow does one distinguish one from the other?

Mammals are most adapted among the vertebrates. Elaborate.

Amit went on mountain for trekking. After reaching at about 2000 m height. He experienced difficulty in breathing. His rate of breathing increased and he decided to discontinue the trek and return back to the ground. Being concerned about his health. ls consulted his doctor friend about it? His friend explained that it is a normal phenomenon and he should have carried an oxygen cylinder while going for the trek.

1. Why is it difficult to breathe as we go up on a height?
2. Why does his friend suggested to carry an oxygen cylinder?
3. Which component of blood show its increase when someone moves from plains to higher altitudes?
4. What values are shown by Amit?