Cell Division — Biology STD 10 — Question

Given alongside are the diagrammatic sketches of some endocrine glands. Observe the figures and answer the following questions:
(i) Label the parts numbered 1 to 5.
(ii) Name the hormones secreted by (2) and (5).
(iii) Which chemicals in our body are greatly affected by hormones?
(iv) What is the chemical nature of hormones?
(v) Name the elements related to the functioning of hormones secreted by the structure (2) and (5).

Name the six ancestral forms in their correct sequence through which modern man has evolved.

Enumerate the structural differences between white blood cells and red blood cells.

Given below are some pictures. Match them with the correct options.

Pictures		Cross
1.		a.	Incomplete
2.		b.	Sex determination
3.		c.	Dihybrid cross
4.		d.	Pedigree analysis

 

The figure given below is a technique. Look at it carefully and answer the questions that follow :


(i) Name the technique.
(ii) Give the purpose of this technique.
(iii) Name the similar technique adopted in men.

Draw a labelled diagram of the inner ear. Name the part of the inner ear that is responsible for static balance in human beings.

Given below is an outline of the human body showing the important glands.

(i) Name the glands marked 1 to 5.
(ii) Name the hormone secreted by 2. Give one important function of this hormone.
(iii) Name the endocrine cells present in part 3.
(iv) Name the hormone secreted by part 3. Give one important function of this hormone.

Sterilization in men means preventing the flow of sperms into the seminal vesicles by cutting or ligaturing the vas deferens. Can there be a corresponding operation made in women? If yes, where?

Differentiate Between Transpiration and Guttation.