Some Major Ecosystems Chapter 26 Biology 12th Class MCQ Test Preparation Punjab

Total Questions: 20

Total Marks: 20

Time: 20 Mins

Question # 1

Savannah finds its ideal condition of growth in:

Question # 2

which one of the following will be a condition, when farming, overgrazing, climate change and/or seasonal drought change farmland into land that cannot support plant life?

Question # 3

In the open ocean, ______________ are organisms that are large enough to swim independently and feed on microscopic organisms and each other.

Question # 5

What is the difference between Alpine Tundra and Arctic Tundra?

None of these.
There is no Alpine Tundra.
One is classified as a region and the other is found atop high mountains.
They both are the same.

Question # 6

Which of the following ecosystem is least productive in terms of net primary production?

Question # 7

What are the three animals found in the Arctic polar lands?

Question # 8

Name the zone of fresh water aquatic ecosystem where enough light can penetrate.

Question # 9

Cells involved in protection, support against gravity in animals are _______.

bone cells
impulse conducting cells
neurons
glial cells

Question # 10

Which two biomes are the most similar with regard to rainfall?

Rain forest and savanna
Tundra and taiga
Tundra and desert
Temperate forest and prairie

Question # 11

Which of the following layers of the forest is thickest during the summer?

Question # 12

What would be the effect of temperature on aquatic or hydrospheric ecosystem?

There is no difference in change in temperature of water and air.
Water changes its temperature slower than air and temperature in aquatic ecosystem is more moderate to support life.
Temperature in aquatic ecosystem is more moderate to support life.
Water changes its temperature slower than air.
Water changes its temperature faster than air.

Question # 13

Dominant species of grass land ecosystem includes :

Question # 14

Some seeds possess a chemical which prevents seed from germination, seed only germinate :

Question # 15

Why doesnt photosynthesis occur in deep ocean water?

Question # 16

Which region or zone of ocean is the producing region, where sunlight can penetrate.

Question # 17

What would be the function of hairy leaves of desert plants?