Question

Which one of the following sentences is not correct ?
A. The presence of moisture, nutrients and a large number of spores in air are responsible for the rapid spreading of bread mold on slices of bread
B. In binary fission, the organism divides to form two daughters
C. Asexual reproduction involves gametes
D. Asexual reproduction involves only one parent

Answer 1

Hint: Mold can only spread if there is wetness and a significant number of spores. By binary fission the organism divides into two daughters. Asexual reproduction is a type of reproduction in which the children are produced by a single organism rather than by the union of gametes as in sexual reproduction.

Complete answer:
The presence of a huge number of spores in the air, as well as moisture and nutrients, are responsible for the rapid development of bread mold on slices of bread. The sporangium of the bread mold disperses many spores into the air, which germinate on a substratum and form hyphae under favourable conditions.
Binary fission is asexual reproduction in which the body is split into two new bodies. Binary fission occurs when an organism copies its genetic material, or deoxyribonucleic acid (DNA), and then divides into two halves (cytokinesis), each obtaining one copy of DNA.
Asexual reproduction is the process of reproducing without the use of sex cells or gametes. Asexual reproduction does not require the union of male and female gametes to create children, as it does in sexual reproduction. In the absence of a mate, the organism can reproduce, producing offspring that is typically a clone of the parent.
Hence option (C) is not the correct statement.

Note:
In asexual reproduction offspring will be always identical to the parent. The genes of the original and its copy will be the same, except that a rare mutation in this process does not change the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organism inherit the full set of genes of their single parent.