How do organisms reproduce Worksheets

How do organisms reproduce Worksheet-10

Subjective questions:

81. What is tissue culture?

82. What changes does the male sex hormone, testosterone bring about?

83. What is the name of the reproductive process which involves

(i) two parents  (ii) only one parent?

84. Which type of reproduction

(i) involves gametes  (ii) does not involve gametes?

How do organisms reproduce Worksheet-11

Subjective questions:

1. What methods will you use for growing jasmine and rose plant?

2. Describe how the sex of the offspring is determined in the zygote in human beings.

3. Some crop plants can be grown from a seed as well as vegetatively from stem cutting. List any four advantages of vegetative propagation in such cases.

4. Show by a series of labelled sketches, the manner in which reproduction occurs in Hydra.

5. What is the significance of pollination?

How do organisms reproduce Worksheet-12

Subjective questions:

31. Justify the statement 'Primary sex organs control the growth, function and maintenance of secondary sex organs'.

32. Mention the functions performed by the secretions of the accessory/secondary sex glands in human males.

33. What are the functions of a flower?

34. Differentiate between ovum and zygote.

35. Differentiate between primary sex organ and secondary sex organ.