Biology

Question 1

1Which mineral is needed for making chlorophyll?

Easy

A. sodium B. magnesium C. iodine D. calcium

Question 2

2Hydroponics is the cultivation of plants in

Easy

A. rocky soil B. compost only C. dry sand D. a nutrient solution without soil

Question 3

3Plants make their own food and are called ___.

Easy

Your answer (fill in the blank)

Question 4

4Soda lime absorbs

Easy

A. carbon dioxide B. water vapour C. oxygen D. nitrogen

Question 5

5The green pigment in leaves is ___.

Easy

Your answer (fill in the blank)

Question 6

6Nitrogen deficiency in plants causes

Easy

A. dead tips only B. yellowing of leaves C. purple leaves D. long roots

Question 7

7Which mineral is needed for protein synthesis?

Easy

A. sodium B. iron only C. chloride D. nitrate

Question 8

8Plants that are totally dependent on dead organic matter are

Easy

A. autotrophs B. saprophytes C. parasites D. epiphytes

Question 9

9Chloroplasts are found in all plant cells.

Easy

A. True B. False

Question 10

10Potassium deficiency causes

Medium

A. tall plants B. extra roots C. yellow leaf margins D. blue leaves