Question

-1 - Multiple choice questions: -
1) Breathing is a __- process.
a) chemical. B) physical C) biological.
2) Respiration occurs in the presence of _--
a) Oxygen. B) nitrogen C) carbon dioxide
3) Fragmentation is common in some filamentous algae like_--
a) Xanthium. B) Spirogyra. . C) Vallisneria
4) Electric current is one of the most useful forms of __-
a) Energy B) motion. C) wave
5) --- is the most valuable source of fresh water on the earth.
a) Rainwater. B) Groundwater. C) Surface water.
2 -Fill in the blanks:-.​

Answer 1

Answer:

1) physical

2) oxygen

3

)spogiyra

Answer 2

Answer:

1. Physical

2. Oxygen

3. Spirogya

4. motion

5. Groundwater