Modes of Reproduction in Lower Organisms

The desirable characters of parents can be retained in offspring by

Which of the following plants are grown by vegetative propagation?

'X' is an asexual mode of reproduction in organisms. Here, the nucleus of the organism divides repeatedly to form a number of equal-sized daughter nuclei and each daughter nuclei break away together with a small portion of the cytoplasm. It is found in Plasmodium. The type of reproduction mentioned as 'X' is

What are the means of reproduction in unfavourable conditions?
Budding
Multiple fission
Spore formation
Fragmentation
 

_____type of reproduction occurs in Hydra.

Parthenogenesis can be observed in _____.

In which artificial method of vegetative propagation, scion and stock is involved.

Body breaks up into several fragments and each fragment starts to live as a new individual. This is _____type of reproduction.

Morphallaxis refers to

What is vegetative propagation? 

Enlist the advantages of vegetative propagation.

In grafting, the rooted plant is used as a 

In vegetative reproduction, when two different individuals participate then it is called

Main example of fragmentation is

Name the thread like non-reproductive structures present in Rhizopus.

Name the following:

'Blobs' that develop at the tips of the non-reproductive threads in Rhizopus.

Directions: Read the given comprehension carefully and answer the question that follows.

Man's dependence on plants is, indispensable. It is this dependence for food, shelter and clothing that has led him to explore all possible ways to preserve plants from being lost to the ravages of natural or man-made calamities. Accordingly, man has used various methods to overcome these calamities. While doing so, scientists hit upon a technique whereby plants cannot be restored from being lost, but can be developed into a complete plant from a small plant par. This technique, called tissue culture, subsequently proved to be boon for mankind. Basically, tissue culture is technique by which small pieces of different parts of a plant body are grown on a nutritional media, under completely sterile conditions. These explants divide and gradually develop either into an unorganized mass of cells called callus or after a few cell divisions, differentiate to form full-fledge plants. This concept of tissue culture dates back to 1878. Scientists like cultivation of artificial embryos can be possible depending on the nutritional media.

The idea of tissue culture was first introduced in-

Explain how these structures protect themselves and what is the function of the structures released from the 'blobs' in Rhizopus.

When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or along with leaves and grow into new plants.

Name a common plant grown in many homes which can be propagated from its broken stems like plant X. (Money plant/ Basil plant/ Aloe Vera)

How many weeks old tissue cultured plant can be transferred to the soil?