Question

Find the odd man out:

1. Cell body, muscle fibre, axon, dendrites.

2. Tracheids, vessels, companion cells, xylem fibres.

3. Sieve tubes, tracheids, phloem parenchyma, phloem fibres.

4. Holstein, Brown swiss, Bombyx mori, Jersey.

Answer 1

1. Muscle fibre. It is a muscle cell whereas the others are parts of nerve cell.

2. Companion cells. It is an element of phloem whereas the others are elements of xylem.

3. Tracheids. It is an element of xylem whereas the others are elements of phloem.

4. Bombyx mori. It is a variety of silkworm whereas the others are varieties of cows.