Biological Reproduction

 Yes, it is correct. In plasmodium, asexual or sexual reproduction takes place. It depends on their life cycle.

This is the correct option. In hydra, a new organism grows out of the parent's body in the form of a bud.

This is the correct option. Fish and frog produce their young ones by the method of sexual reproduction.

This is the correct option as this statement is false. Sex cells are involved in sexual reproduction whereas no sex cell is involved in asexual reproduction.

This is the correct option as this statement is false. In the process of fission, the parent organism splits to form two new organisms.

This is the correct option as sponges, corals and sea anemones reproduce by budding.

Wrong answer

Regeneration is the ability of an organism to regrow lost or damaged body parts, or even develop into a complete organism from a fragment. Budding creates new individuals from outgrowths, fusion involves joining, and fission is splitting - but regeneration specifically refers to regrowth from fragments.

Hydra can regenerate lost body parts. When cut into two pieces, each piece can regenerate the missing parts and develop into a complete organism. This remarkable regenerative ability is why cutting a hydra doesn't kill it - both fragments can become complete organisms.

Binary fission produces exactly two offspring from one parent (binary = two). Multiple fission produces many offspring simultaneously from one parent. The key difference is the number of individuals formed - binary fission always results in two daughter organisms.

An individual organism can survive without reproducing, though the species cannot continue without it. Digestion, respiration, and excretion are essential metabolic processes that maintain life functions in individual organisms. Reproduction ensures continuity of the species but is not required for an organism's survival.

Binary fission in organisms like Amoeba and Paramecium occurs during favorable environmental conditions when resources are abundant. This allows rapid population growth. During unfavorable conditions like drought or extreme temperatures, many organisms form protective cysts rather than divide.

Bread mould (Rhizopus) reproduces asexually through spore formation. Spores are microscopic reproductive cells produced in sporangia that germinate into new organisms when conditions are favorable. Regeneration, fission, and budding are different modes of asexual reproduction not used by Rhizopus.

Regeneration is carried out by specialized cells that have the ability to proliferate and differentiate into various cell types. In organisms like Planaria, these specialized cells (called neoblasts) can regenerate entire body parts. Regular body cells or differentiated cells have lost this capacity.

Higher plants naturally reproduce asexually through vegetative propagation using structures like runners, tubers, bulbs, and stolons. Spore formation occurs in lower plants like ferns and mosses. Budding occurs in yeast and hydra, while regeneration is seen in simple animals like Planaria.