How do organisms reproduce Worksheet-11

How do organisms reproduce Worksheet-11


Subjective questions:

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


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


  1. 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.


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


  1. What is the significance of pollination?


  1. Draw a diagram to show the structure of a flower.


  1. Name the different parts (in sequence) forming the duct system of human male reproductive system. What is the duct system for?


  1. Draw a diagram of longitudinal section of a pistil showing pollen germination and label the following parts.

(i) style     (ii) pollen tube


  1. Explain the significance of the conditions in humans in which the testes remain suspended in scrotum outside the abdominal cavity.


  1. Leaves of Bryophyllum fallen on the ground produce new plants whereas the leaves of rose do not. Why?


  1. Mention any two functions of human ovary.


  1. What is menopause?


  1. Define the term unisexual and bisexual giving one example of each.


  1. Mention secondary sexual characters in human male and female.


  1. Describe menstrual cycle.


  1. Differentiate between menarche and menopause.


  1. Write the full form of IUCD, AIDS, HIV, OC.


  1. Define sexually transmitted disease and give two examples.


  1. What are the functions of sex hormones?


  1. Give the disadvantages of vegetative propagation in plants.


  1. Enumerate the process of binary fission in four steps.


  1. Show than spirogyra propagates by regeneration.


  1. What is the outcome of fertilisation? What is fertilisation otherwise known as?


  1. What are the two possibilities of self-pollination?


  1. Differentiate between the functioning of the human male and female reproductive system.


  1. Briefly explain the process of formation of the placenta.


  1. Mention any two simultaneous changes that occur side by side in the female reproductive system along with the follicular maturation.


  1. Name two STDs other than Syphilis and Gonorrhoea. How do they get communicated?


  1. What are the advantages of tissue culture?


  1. Bring out the differences between budding and fission.