10th Class Chapter 4 Biology Long Questions

Binary fission mean division into too it is the simplest and most common method of asexual reproduction it occur in prokaryotic bacteria many unicellular eukaryotic protozoa and some invertebrates .

The process by which organisms produce new organisms of their own kind.

Types of reproduction:

Learnt the two basic types of reproduction

Asexual reproduction

Sexual reproduction

The process in which there is incomplete oxidation reduction of the organic substrate glucose.

The process in which there is incomplete oxidation reduction of the organic substrate glucose.

When rizopus reaches reproduct age its body cells from thick walled spore sacs called sporangia inide each sporangium a cells divides many times and forms many daughter cells called spores .

A form of asexual reproduction in which an unfertilized egg develops into new off spring.

A type of asexual reproduction in which the vegetative parts of the plants i.e root atem or leaves produce new generation.

Artificial vegetative propagation in which cutting are taken from stem or root of parent and are placed in soil.

Grafting:

In grafting a piece of stem is cut from the plant and is attached with another plant established root

System.

The process of fertilization involves two fusions it is called double fertilization.

In plants phenomenon in which the sporophyte and gametophyte generation alternative with each other.

The transfer of pollen grains from flowers another to stigma.

Third whorlic and roecium is the male reproductive part of flowers it units are called stamens.

The embroyonic stem above the paint of attachment of the cotyledon.

Hypocotyls:

The embroyonic stem below the point of attachment of cotyledon.

The process by which a seed embryo develops into a seeding.

The fusion of male and female gemets to from a zyyote.

Spermatogenesis mean the formation of sperm.

The process in which ovaries develop into fruit without the fertilization in the ovules present in them result in seedless fruit e.g bananas.

Prostate gland produce a secretion that neutralizes the acidity of the fluid.

The male and female gametes sperms are produced in specialized organs called gonads.

In epigeal germination the hypocotyls elonagates and forms a hook pulling the cotyledons above grand beans cotton and papaya are the example of seed that germinate this way.

Hypogeal:

In hypogeal germination the epicotyls, enlongates and forms the hook in this type of germination the cotyledon say underground.

Sefl pollination is defined as the transfer of pollen grains from the another to the stigma of the same flower or other flowers of the same plant.

Cross pollination:

Cross pollination is transfer of pollen grains from flower on one plant to the flower on other plant of the same species.

Asexual reproduction does not involve the fusion of gametes they are many types of asexual reproduction all producing individuals that are genetically identical to each other and to the parent.

The bacterial spores are also thick walled they are formed inside bacterial cells so are called endospores.