Science Olympiad Test: Reproduction in Organism- 1 - Class 10 MCQ

Offspring produced from sexual reproduction shows more variation because sexual reproduction takes place between male and female of the same species and the genetic material comes from both the individuals in the form of male and female gametes and there is a genetic recombination.

The factors responsible for the rapid spreading of bread mould on slices of bread are the presence of a large number of spores in the air and the presence of moisture and nutrients in bread that act as food for the fungi.

Spirogyra reproduces asexually by fragmentation and sexually by conjugation. In the fragmentation method, Spirogyra breaks into two or more segments and each segment forms a new organism.

The gametes have half the number of chromosomes. After their fusion, the zygote thus formed has a full set of chromosomes. Therefore, the numbers of chromosomes in parents and offsprings of a particular species remain constant.

The fleshy round structure/s on an embryonic axis that contains reserve food material is known as cotyledon (C). Radicle (B) is present at the micropylar end of embryonic axis while plumule (A) is present on the opposite extreme. 

In human males, testes descend into a muscular bag called as the scrotum, which lies outside the body cavity, before birth and remains there for rest of life because sperm production occurs at a temperature lower than the body temperature.

Anther is part of stamen (male sex organ) that produce pollen (male gamete). Ovary is inferior part of pistil (female sex organ) which contains ovule. Female gametophyte develops in ovule.

The surgical method of birth control in females is termed as tubectomy.

Typically, plants propagate with the help of seeds contained in fruits. But that's not the only way plants propagate. New plants may be produced from vegetative parts of the plant such as roots, stems and leaves. This type of reproduction is known as vegetative propagation.

Leishmania is the protozoan that has flagellum at its one end.