Question

Deficiency symptoms of phloem-immobile elements such as potassium and nitrogen appear first in older leaves.

A. True
B. False'

Answer 1

Deficiency symptoms of phloem-immobile elements such as potassium and nitrogen appear first in older leaves.

Step-by-step explanation:

True. Deficiency symptoms of phloem-immobile elements such as potassium and nitrogen appear first in older leaves.

When a plant is deficient in nutrients like potassium and nitrogen, these elements cannot be easily transported to the older leaves via the phloem. As a result, the older leaves show symptoms of nutrient deficiency first, such as yellowing or chlorosis.

For example, potassium deficiency in plants can cause the older leaves to develop yellow or brown spots, curl at the edges, or show stunted growth.