Question

Which of the following is involved in inhibition of growth of plants which is produced due to human activities?

• A. Auxins
• B. Phytotoxin
• C. Mycotoxins
• D. Antitoxins

Answer 1

The correct option is B Phytotoxin

Auxin is a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.

Phytotoxins refers to substances that are inhibitory to the growth of or poisonous to plants. Phytotoxic substances may result from human activity, as with herbicides, or they may be produced by plants, by microorganisms, or by naturally occurring chemical reactions.

Mycotoxins are toxic chemical products produced by fungi that readily colonize crops.

Antitoxins are antibodies that counteracts a toxin.

So, the correct answer is option B.