Biology

Question 1

1Lime water turns milky in the presence of

Easy

A. oxygen B. carbon dioxide C. nitrogen D. hydrogen

Question 2

2Which gas is used up in aerobic respiration?

Easy

A. nitrogen B. hydrogen C. carbon dioxide D. oxygen

Question 3

3Amphibians can breathe through the

Easy

A. moist skin B. spiracles C. feathers D. gills only

Question 4

4During inhalation the diaphragm

Easy

A. stays still B. contracts and flattens C. relaxes and arches D. moves up

Question 5

5The diaphragm is a muscle.

Easy

A. True B. False

Question 6

6During exhalation the intercostal muscles

Easy

A. stop working B. contract C. tear D. relax

Question 7

7Oxygen diffuses from alveoli into blood.

Easy

A. True B. False

Question 8

8The gas exchange organs in fish are the

Easy

A. gills B. skin C. spiracles D. lungs

Question 9

9Fish gills have a rich blood supply.

Easy

A. True B. False

Question 10

10Breakdown of glucose without oxygen in yeast gives ethanol and ___.

Easy

Your answer (fill in the blank)