Question

A. Choose the correct option for each of the following.

1 The sting of a red ant contains
(a) Oxalic acid
(b) Acetic acid
(c) Formic acid
(d) Lactic acid

2. The mode of transfer of heat between two objects that are in physical contact is
(a) Conduction
(b) Radiation
(c) Convection
(d) All of these

3. An instrument used to measure the amount of rainfall is
(a) Bore gauge
(b) Rain gauge
(c) Gauge block
(d) Feeler gauge

4. The organic mixture formed from animal and plant decay matter and minerals is called
(a) Humus
(b) Weathering
(c) Infertile soil
(d) Dry sand

5. Microorganisms like bacteria, fungi and protozoa are commonly termed as
(a) Producers
(b) Consumers
(c) Decomposers
(d) Primary consume

6. The reproductive cells are also called
(a) Gametes
(b) Male cells
(c) Female cells
(d) Zygote

7. Respiration in earthworm takes place through
(a) Moist skin
(b) Lungs
(c) Gills
(d) Dry skin

8. Respiration through the lungs is also called
(a) Pulmonary respiration
(b) Cutaneous respiration
(c) Buccal respiration
(d) None of these​

Answer 1

Answer:

1.c 2.c 3.b 4.a 5c 6a 7 a 8a

Answer 2

Answer:

1. (c) Formic acid

2. (a) Conduction

3. (b) Rain gauge

4. (a) Humus

5. (b) Consumers

6. (a) Gametes

7. (a) Moist skin

8. (a) Pulmonary respiration