Question

Which of the following is not correctly matched?
A.Offset- Water hyacinth
B.Rhizome- Banana
C.Binary fission- Sargassum
D.Conidia- Penicillium

Answer 1

The given pairs are of organisms and their mode of reproduction or propagation. It is basically asexual mode of reproduction.

Complete answer:
Option A: Offset is a thick short stem modification usually found in aquatic plants. Offsets are of one internode length. From a parent plant, the stem grows horizontally and at the next nod, a new plant with leaves and adventitious roots are produced. This is a mode of vegetative propagation found in plants like sepia and water hyacinth. This is correctly matched. Therefore, this is the incorrect option.

Option B: Rhizomes are underground stem modifications found in certain plants. Rhizomes grow vertically upward and produce new shoots and roots and grow into new plants. They have distinct nodes and internodes and each piece can grow into a new plant. Rhizomes are found in bananas. This is correctly matched. Therefore, this is the incorrect option.

Option C: Binary fission is a mode of asexual reproduction. In this, the organism or cell divides into two pieces and each piece grows into a fully developed new individual. Binary fission is common amongst prokaryotes and amoeba etc. Sargassum is macroalgae and is multicellular. They reproduce through a vegetative method called fragmentation, and not by binary fission. This is not correctly matched.
This is the correct option.

Option D: Conidia is a type of asexual reproductive spores found in some algae. They are non-motile. Conidia are found in penicillium. This is correctly matched. Therefore, this is the incorrect option.

Hence, the correct answer is option (C)

Note: Sargassum is a type of algae that grows in shallow ocean and coral reefs. They can grow up to meters in length. They do not reproduce through spores. They reproduce either by sexual means or through vegetative means.