How Do Organisms Reproduce
Very Short Answer Type Questions
Que.1. How is it possible to control fertilization ?
Write its significance.(mp 2006 Set C)
Ans. These two methods to control fertilization.
- Increase in population can be chacked .
- Population of the country will be controlled, thus aims of five year planing. Education and other facilities of each child will becomes successful.
Q.2. What is meant by pollination ? Differentiate between self and cross pollination. (Any four) (mp 2011)
Ans. Pollination: The process of transfer of pollen grains from anther of stamen (Androecium) to stigma of pistil is called pollination.
Differences between self and cross pollination:
- The process occurs only in bisexual flowers.
- The pollen grains of the flower reach to thew stigma of the same flowert.
- No medium is required for the transfer of pollen grains.
- The process may occur in both unisexual and bisexual flowers.
- The pollen grains fall on the stigma of the other flower but of the same species.
- Any medium like air, water, insects or animal is required for the transfer of the pollen grains.
Q.3. Compare the growth in animals and plants.(mp 2006)
Ans. Comparison between the growth in animals and plants:
Q.4. How many types of pollination ?
Ans. Types of pollination: (1) Sef pollination, (2) Cross pollination.
Short Answer Type Questions
Q.1. Write various types of asexual reproduction in plants.
Ans. Following are various types of asexual reproduction in plants.
- Fission: some organisms on maturity split into two or more than two parts and each part is developed into offespring. This process is called fission.
- Budding: it is the type of asexual reproduction in which a new organism develops from an out growth or bud due to cell division at one particular site.
- parthenogenesis: The process in which young ones are produce from female gametes or egg cells without the process of fertilization is called parthenogenesis.
Q.2. write down the differences between sexual and asexual reproduction.
Ans. Differences between sexual and asexual reproduction :
Sexual reproduction :
- Both male and female sexes are required for the process.
- Offspring are genetically different from the parent organism.
- It occurs almost in all types of animals.
- fertilization takes place.
Asexual reproduction :
- Only one individual is required for this reproduction.
- Offspring are genetically same as that of patent organism.
- it occurs only in invertebrates and in lower chordates.
- fertilization is absent.
Long Answer Type Questions
Q.1. Write the functions of ovary and oviduct.
Ans. Functions of ovary and oviduct:
- Ovary: Two ivaries are present at the lower side of the abdominal cavity. Ovum is formed in it.
- Oviduct: It is a thin and coiled tube which joins the uterus and ovary. It passes the ovum into the uterus and provides place for fertilization.
Q.2. Draw a labelled diagram of longitudinal section of flower.