How do organisms reproduce Worksheet-14

How do organisms reproduce Worksheet-14

 

Subjective questions:

  1. (i) Which are the two main types of reproduction in living organisms?

(ii) Classify the following under these two types: Amoeba, Frog, Earthworm, Yeast.

 

  1. What are the male and female gonads in human beings? State any two functions of each of them.

 

  1. What is vegetative propagation? When is it used? Name three methods of vegetative propagation.

 

  1. Differentiate between 'self-pollination' and 'cross-pollination'. Describe 'double fertilisation in plants.

 

  1. Define any three of the following terms used in relation to human reproduction :

(i)     Fertilisation      (ii)    Implantation

(iii)   Placenta             (iv)   Gestation          

(v)    Parturition

 

  1. (i)     When does ovulation occur during the menstrual cycle in a normal healthy female?

(ii)    Draw a labelled diagram to show the reproductive system of a human female.

 

  1. Name any two sexually transmitted diseases (STDs). How do these infectious diseases spread from one person to another? Give two symptoms of STDs.

 

  1. Draw a diagram of a flower to show its male and female reproductive parts. Label on it:

(a) The ovary                          (b) The anther

(c) The filamet                        (d) The stigma

 

  1. Draw a labelled diagram of the longitudinal section of a pistil showing pollen germination.

 

  1. Give a labelled diagram of pistil showing in it the path of male gametophyte from the stigma to the embryo sac.

 

  1. Give two advantages of vegetative propagation.

 

  1. What is reproduction? How do the following organisms reproduce by asexual methods?

(a) Potato                             (b) Hydra

(c) Malarial parasite          (d) Planaria.

 

  1. Describe asexual reproduction in Amoeba.

 

  1. Explain various steps of budding in Yeast.

 

  1. What are the various methods of vegetative propagation? Discuss any one method with example.

 

  1. What is pollination? Describe cross-pollination.

 

  1. Describe double fertilisation in plants.

 

  1. Fertilisation is possible if ovulation has taken place during middle of the menstrual cycle. Give reasons.

 

  1. Describe surgical methods of birth control.

 

  1. Give the differences between asexual and sexual reproduction.

 

  1. With the help of a neat sketch illustrate any three natural methods of vegetative propagation.

 

  1. What causes joining up of stock and scion in grafting? Name one positive trait that the plant contributing scion should have and one positive trait that the plant contributing the stock should have.

 

  1. What is the significance of sexual mode of reproduction?

 

  1. Justify that parthenogenesis is not the same as asexual reproduction.

 

  1. Justify why the male reproductive system is called the 'urinogenital system'

 

  1. Mention the names of any three agencies actively involved in ensuring reproductive health. Also state their nature of contribution.

 

  1. Show only by diagrams the stages of fission in Paramoecium.

 

  1. Give the differences between human sperm and human ovum.

 

  1. Describe the process of fragmentation with an example.

 

  1. Distinguish between testes and ovary.