The Nervous System and Sense Organs — Biology STD 10 — Question

Suppose a normal woman has never borne a child; How many mature eggs would she have produced in her lifetime? Your calculation should be based on two clues-
(a) Eggs are produced at the rate of 1 egg every 28 days (one menstrual cycle)
(b) A woman’s total reproductive period is 13 – 45 years.

Give Technical Term:
The duct which transports urine from the kidney to the urinary bladder.

Name the three ear ossicles. How do they contribute in the mechanism of hearing?

Differentiate
Tubectomy and Vasectomy.

Define the following:
Monoceious

From which structure cuticular transpiration occur in plants?

Why is it necessary to know the blood groups before giving transfusion?

Name the Following :
The blood vessel that begins and ends in capillaries.

Correct the following statements if there is any mistake.
If there are 46 chromosomes in a cell there will be 23 chromatin fibres inside the nucleus during interphase.

Name the following:
A type of blood circulation found in mammals.