The circulatory system — Biology STD 10 — Question

Bending of plant shoot towards the source of sunlight displays:

The part of nephron responsible for the recovery of water and sodium chloride from the urine is:

Choose the correct analogue to the organs related to the entry or exit of blood through the blood vessels.

Which of the following problems is not created by noise pollution?

Which would do maximum harm to a tree?

Red blood cells are also called as erythrocytes. Cellular component of blood, millions of which in the circulation of vertebrates give the blood its characteristic colour and carry oxygen from the lungs to the tissues. The mature human red blood cell is small, round, and biconcave; it appears dumbbell-shaped in profile. The cell is flexible and assumes a bell shape as it passes through extremely small blood vessels. It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin-a red ironrich protein that binds oxygen.
Answer the following questions in context to RBC.
(iii) Choose the correct statement:

Another name for Bulbourethral gland is:

The statistical study of human population is called:

A sequence of DNA has 200 nitrogenous base pairs, of which 100 are Thymine-Adenine pairs. What is the number of CytosineGuanine pairs in this sequence: