Ecosystem Test

Result

Ecosystem Test - 46

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Primary succession is development of communities on

A
Newly exposed habitat

B
Cleared forest area

C
Freshly harvested crop field

D
Pond filled after a dry season
Solution
Correct option: A
Explanation:
Primary succession is the development of forest areas in an area that has been bare for a long period of time.
The first community to inhabit the area is the pioneer species.
The final community to be stable is the climax community.
And the different stages that come between it are known as the seral stages.
Hence, primary succession is the development of communities in "Newly exposed habitat".
Question 2
1 / -0

In ecological succession from pioneer to climax community, the biomass shall

A
Decrease

B
Increase and then decrease

C
No relation

D
Increase continuously

Solution

When the community moved from a pioneer community to the climax community, the biomass will increase. This will increase the biomass because the number of organisms belonging to different species will also increase. Along with this, the number of organic matter collection will increase due to the accumulation of organic matter. So, the biomass will increase.
So, option D is the correct answer.
Question 3
1 / -0

Term used to describe non-dominant species that dictates community structure is

A
Pioneer species

B
Keystone species

C
Transitional species

D
All of the above
Solution
- Keystone species are the ones that live in a particular area and determine the flora and fauna and overall structure of the area. They might not be in great numbers but drastically affect the structure of the community.
- Pioneer species are hardy species that are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by fire.
- A transitional fossil may be defined as a fossil that exhibits traits common to both ancestral and derived groups.
So, option B is the correct answer.
Question 4
1 / -0

Last stabilised community in a plant succession is known as

A
Seral Community

B
Pioneer Community

C
Ecosere

D
Climax Community

Solution

The process of development of new communities is called the process of ecological succession In this type, several different communities are formed and they evolve and progress with the passage of time. It starts with the pioneer community, proceeds with seral community and finally comes into existence the climax community. It is the last and most stabilised community to live in that ecosystem till its destruction takes place.
So, option D is the correct answer.
Question 5
1 / -0

Succession is

A
Orderly process of community change till stability.

B
Gradual convergent, directional and continuous process.

C
Series of biotic communities that appear generally in barren area.

D
All of the above.

Solution

Ecological succession is a process in which different communities grow one by one in an ecosystem. The last community that invades an ecosystem is the climax community. It is the most evolved form of community that remains stable until the ecosystem is destroyed. Ecological succession is a diverse process. It generally starts on a barren land.
So, all of the above options are correct. Option D is the correct answer.
Question 6
1 / -0

In pond ecosystem, the shape of pyramid of number is?

A
Linear

B
Irregular

C
Upright

D
Inverted

Solution

In the pond ecosystem, the shape of the pyramid of numbers is upright. In this, the number of producers are maximum, followed by primary consumers (herbivores), followed by secondary consumers (carnivores). The base of the pyramid of number represents the producers in a pond ecosystem.
Thus, the correct answer is option C.
Question 7
1 / -0

In ecological succession, the climax community is best recognised by the following state

A
P = R

B
P > R

C
P < R

D
P $$\neq$$ R

Solution

A climax community is the last community to arrive in an ecological succession before it's destruction. It is the most stable of all the communities. In this type of community, the Productivity and Respiration rates are equal. So, in a climax community, P=R, which is equal to 1.
So, option A is the correct answer.
Question 8
1 / -0

Keystone species should be protected as they

A
Are capable of certain minerals in the soil.

B
Indicate presence of certain minerals in the soil.

C
Have become rare due to over-exploitation.

D
Play an important role in supporting other species.

Solution

Keystone species are the ones that are present in less numbers and are non dominating species. Yet they play a very important role in maintaining the structure and balance of the ecosystem. So, they should be taken proper care off.
So, option D is the correct answer.
Question 9
1 / -0

The species though insignificant in number determines the existence of many other species in a given ecosystem

A
Extinct species

B
Endemic species

C
keystone species

D
Sacred secies

Solution

A keystone species is a plant or animal that plays a unique and crucial role in the way an ecosystem function. Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. Some keystone species, such as the wolf, are also apex predators. Keystone species have a disproportionately large effect on the communities in which it occurs. Such species help to maintain local biodiversity within a community either by controlling populations of other species that would otherwise dominate the community or by providing critical resources for a wide range of species.

So, the correct answer is 'keystone species'.
Question 10
1 / -0

In succession, the structural complexity

A
Drastically increases

B
Remains constant

C
Slowly increases

D
Does not increases

Solution

Int he process of ecological succession.. many different species invade a particular geographic location. The first community is the pioneer community, it is followed by many seral communities and the last one is the climax community. The individuals of climax community have the maximum adaptation to evolution and are most complex structurally.
So, option C is the correct answer.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Ecosystem Test - 46

Result

Ecosystem Test - 46

Score

-

Rank

-

SHARING IS CARING

Question 1

Newly exposed habitat

Cleared forest area

Freshly harvested crop field

Pond filled after a dry season

Solution

Question 2

Decrease

Increase and then decrease

No relation

Increase continuously

Solution

Question 3

Pioneer species

Keystone species

Transitional species

All of the above

Solution

Question 4

Seral Community

Pioneer Community

Ecosere

Climax Community

Solution

Question 5

Orderly process of community change till stability.

Gradual convergent, directional and continuous process.

Series of biotic communities that appear generally in barren area.

All of the above.

Solution

Question 6

Linear

Irregular

Upright

Inverted

Solution

Question 7

P = R

P > R

P < R

P $$\neq$$ R

Solution

Question 8

Are capable of certain minerals in the soil.

Indicate presence of certain minerals in the soil.

Have become rare due to over-exploitation.

Play an important role in supporting other species.

Solution

Question 9

Extinct species

Endemic species

keystone species

Sacred secies

Solution

Question 10

Drastically increases

Remains constant

Slowly increases

Does not increases

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.