Give biological reasons for the following:

Throat infections can lead to ear infections.

Given below is an example of certain structures and their special functional activities.
For example : Eye and vision. 

On a similar pattern, complete the following:

Neurotransmitters ........................ 

Give the biological/technical terms for the following:

The fluid present between the layers of meninges

The change in an organism resulting due to stimulus

Given below are five groups of terms. In each group, arrange and rewrite the terms in the correct order so as to be in a logical sequence. For example,

Question: Implantation, Parturition, Ovulation, Gestation, Fertilisation.

Answer: Ovulation, Fertilisation. Implantation. Gestation, Parturition.

Draw a diagram of the human eye as seen in a vertical section and label the parts

which suit the following descriptions relating to the

i. Photosensitive layer of the eye.

ii Structure which is responsible for holding the eye lens in its position.

iii Structure which maintains the shape of the eye ball and the area of no vision.

iv Anterior chamber seen in front of the eye lens.

v Outer most transparent layer seen in front of the eye ball.

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Cerebrum and Spinal cord (arrangement of nerve cells)

Give biological reasons for the following:

Throat infections can lead to ear infections.

Give biological reasons for the following:

The hand automatically shows the direction to turn a cycle without thinking.

Choose the correct answer from the four options given below:

Which one of the following associated with the maintenance of the posture?

Given below is an example of a certain structure and its special functional activity. On a similar pattern fill in the blanks with suitable functions:
Example: Chloroplast and Photosynthesis

ii. Ciliary body and _________.