The table below gives the populations (in thousand) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets aginst each. study the table and answer the question which follows:
|
Area and number of habitats
|
Species and their populations (in thousands) in the area |
|||||||||
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
|
|
a(11) b(11) c(13) d(12) |
23 |
1.2 |
0.52 |
6.0 |
- |
3.1 |
1.1 |
9.0 |
- |
10.3 |
|
10.2 |
- |
0.62 |
- |
1.5 |
3.0 |
- |
8.2 |
1.1 |
11.2 |
|
|
11.3 |
0.9 |
0.48 |
2.4 |
1.4 |
4.2 |
0.8 |
8.4 |
2.2 |
4.1 |
|
|
3.2 |
10.2 |
11.1 |
4.8 |
0.4 |
3.3 |
0.8 |
7.3 |
11.3 |
2.1 |
|
Which area out of a to d shows maximum species diversity?
b
c
d
d
C.
d
Habitat is the place where an organism live. The population has been defined as a collective group of organisms of the same species occupying a particular place at a particular time. In the given table area d has maximum species diversity, as there are 10 species (A-J) reside in 12 habitats, while in area c the 10 species reside in 13 habitats so, exhibit less diversity than area d.
Geometric representation of age structure is a characteristic of
Biotic community
Population
Landscape
Landscape
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
S-shaped or sigmoid growth of this insect
The food plants mature and die at the end of the rainy season
Its population growth curve is of J-type
Its population growth curve is of J-type
Consider the following statements concerning food chains
A) removal of 80% tigers from an area resulted in greatly increased growth of vegetation
B) removal of most of the carnivores resulted in an increased population of deers
C) length of food chains is generally limited to 3-4 trophic levels due to energy loss
D) the length of food chains may vary from 2 to 8 trophic level
Which two of the above statements are correct?
B and C
C and D
A and D
A and D
What is true about the isolated small tribal populations?
There is a decline in population as boys marry girls only from their own tribe
Hereditary diseases like colour blindness do not spread in the isolated population
Wrestlers who develop strong body muscles in their lifetime pass this character on their progeny
Wrestlers who develop strong body muscles in their lifetime pass this character on their progeny
