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The deficiency of which of the following leads to dental caries ?

  • Iron
  • Fluorine
  • Copper
  • Zinc

Answer: Option B

Similar Questions :

1. Plants that grow in saline water are known as :

  • hydrophytes
  • thallophytes
  • halophytes
  • mesophytes

Answer: Option C

2. Who invented Insulin ?

  • Christian Bernard
  • Stenach
  • Edwards and Stepto
  • Banting

Answer: Option D

Explanation:

Christian Bernard invented Heart Transplantation,

Stenach invented Sex hormone,

Edwards and Stepto invented first test tube baby.

3. Placenta is the structure formed :

  • by fusion of germ layers
  • by foetus only
  • by the union of foetal and uterine tissue
  • by uterine only

Answer: Option C

4. Rafflesia is the biggest flower of the world ?

  • TRUE
  • FALSE

Answer: Option A

5. What is movement of cell against concentration gradient is called

  • osmosis
  • active transport
  • diffusion
  • passive transport

Answer: Option B

Read more from - Biology Questions Answers
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