Question

Changes that convert larva into adult constitute
A. Metastasis
B. Metagenesis
C. Alternation
D. Metamorphosis

Answer 1

Hint: There are different stages through which an organism undergoes for its growth and development. In addition, every organism develops by growth and cell differentiation. The larval change into an adult is an indirect development.

Complete answer:
Metastasis can be defined as the spread of pathogenic agents from its initial site to different or secondary sites. It is most commonly referred to in cancerous tumors. Metastasis of tumor means the carcinogenic tumor is spreading in different parts of the body. The newly formed tumor after metastasis is called a secondary tumor.
- A type of life cycle that has distinct haploid sexual and diploid asexual stages is called metagenesis. Metagenesis is also called alternation of generation.
-Alternation can be defined as a phenomenon in which things repeat themselves.
-Metamorphosis can be defined as a biological process in which the organism develops physically after birth. It involves the growth and development of an organism. In insects, the process of metamorphosis has four stages which include egg, larva, pupa, and adult. The larva is hatched from the egg which is produced by females. The stage in which the larva makes a cocoon around itself is called a pupa. The larva is converted into an adult inside the cocoon.

Hence, option D, i.e., metamorphosis is the correct answer.

Note: Metamorphosis is seen in insects like butterflies, honey bee, silkworm, and many more. Metamorphosis is also seen in amphibians. Frog is an example of an amphibian in which metamorphosis occurs.