Pollution — Biology STD 10 — Question

The diagram below shows part of the capillary bed in an organ of the human body. Some of the blood arriving at the capillaries at points labeled A, moves out into the spaces between the tissue cells. Study the diagram and answer the questions that follow:

Name any one important component of the blood which remains inside the capillaries and fails to move out into the spaces.

The process by which molecules distribute themselves evenly within the space they occupy.

Name the following:
The most sensitive region of the retina.

Mention whether the cross is a monohybrid or dihybrid.

The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow:

Where in the female reproductive system do these cells unite?

Name the following:
Tissue into which the zygote gets implanted.

The UV rays cause (genetic, mentally, physical) disorders which ultimately affect heredity.

A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
What aspect of photosynthesis was being tested?

Given below is a structure, write its special functional activity.
Myelin sheath and ……………

Write the functional activity of the following structure:
Placenta