Biomolecules — BIOLOGY STD 11 Science — Question

The vertebral column has four articulation points for the four limbs. This is similar to which of the following? What do you understand by ‘spineless’in the literal sense?

1. A four wheeler has four articulation points for the four wheels.
2. A two wheeler has two articulation points for the two wheels.
3. A snake's vertebral column has no articulation point because it has no limb.

Name any four sites where ribosomes are present in plant cells.

What is the difference between cutaneous and pulmonary respiration?

Mention four functions of the limbic system of human brain.

Which products formed during the light reactidn of photosynthesis are used to drive the dark reaction?

Mention any four methods in which plant and animal specimens are preserved in s museum.

How does haemoglobin help in the transport of oxygen from lung to tissues?

Differentiate between. Stamen and staminoid.

What name is given to:

1. The cells of kidney, which secrete erythropoietin.
2. The hormones secreted by liver.