Question

There is no natural death in single-celled organisms like Amoeba and bacteria because
A. They cannot reproduce sexually.
B. They reproduce by binary fission.
C. The parental body is distributed among the offspring.
D They are microscopic.

Answer 1

Hint: Algae and bacteria, both are unicellular organisms. The common mode of reproduction in these organisms is asexual. The parent body gives rise to daughter cells that live individually and divides further. Next-generation arises from a single parent.

Complete answer: Asexual reproduction is a type of reproduction that involves a single parent producing offspring without the involvement of gametes. On the other hand, sexual reproduction is a type of reproduction that involves two parents contributing their gametes to be fused to form offspring. Both types of reproduction can be seen in different bacterial species. Amoeba reproduces asexually by binary fission. Binary fission refers to a subtype of asexual reproduction that involves the splitting of the parent body into two individual cells. In this, the constriction starts to begin in the cytoplasm of the parent cell that further leads to the division of the nucleus into two equal halves. Each division has a nucleus that develops into an offspring called a daughter cell. The parental body gets distributed equally into two halves. Thus, the parent does not die practically but gets divided into its daughter cells. These daughter cells carry their parental genome as it is and thus are clones of their parent cell. Amoeba and bacteria are single-celled organisms that can be seen under the microscope.
Thus, the correct answer is option C.

Note: Asexual reproduction is of various types; fission, budding, fragmentation, and regeneration are some other types of asexual reproduction. Regeneration is a special type of reproduction that confirms the immortality of the parent body. Any cut part of the parent regenerates to form an individual offspring.