Question

Classify the following events into excretion and secretion.
1. Transpiration
2. Latex in plants
3. Salivation
4. Sweating

• A. Excretion- 1 and 2,
  Secretion- 3 and 4
• B. Excretion- 3 and 4,
  Secretion- 1 and 2
• C. Excretion- 2 and 4,
  Secretion- 1 and 3
• D. Excretion- 1 and 4,
  Secretion- 2 and 3

Answer 1

The correct option is D Excretion- 1 and 4,

Secretion- 2 and 3
$\bullet$ Excretion is the passive process by which waste materials are removed out of the body.
$\bullet$ Secretion, on the other hand, is an active process in which movements of materials happen from one point to other.
$\bullet$ From all the events given, sweat production in humans and transpiration in plants are examples of excretion.
$\bullet$ Saliva formation in humans and latex in plants are examples of secretion.
$\bullet$ Water is excreted out of the plants by the process of transpiration.
$\bullet$ Sweat is excreted out by sweat glands present in the accessory excretory organ, skin.
$\bullet$ Saliva is secreted by salivary glands and contain enzymes.
$\bullet$ Latex is an alkaloid which is secreted by rubber plants.