Intraspecific Competition

Q.

Which of the following is not an attribute of a population?

1. Mortality

2. Species interaction.

3. Sex ratio.

4. Natality

Q. Select the option that correctly defines 'competitive release'.

1. Two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated
2. The feeding efficiency of one species might be reduced due to the interfering presence of the another species, although the resources are abundant
3. If two species compete for the same resource, they could avoid competition by choosing different times for feeding
4. A species restricted to a small area due to the presence of a competitively superior species is found to expand its distributional range when the competing species is experimentally removed

Q.

Write two factors that determine the size of a population.

Q. In some shallow South American lakes, visiting flamingoes and resident fishes compete for their common food, the zooplankton in the lake. This is an example of _______________________.

1. intraspecific competition
2. interspecific competition
3. predation
4. parasitism

Q. Assertion: Intraspecific competition is always more than interspecific.
Reason: All members of a species have different requirements of resources.

1. Both the assertion and reason are true and the reason is the correct explanation of the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
3. The assertion is true but the reason is false
4. Both assertion and the reason are false

Q. A species restricted to a small geographical area because of the presence of a competitively superior species, is found to expand when the competing species is removed. This phenomenon is called

1. resource partitioning
2. competitive release
3. parasitism
4. predation

Q. If in a population, natality is balanced by mortality, then there will be

1. overpopulation
2. decrease in population growth
3. zero population growth
4. increase in population growth

Q. A type of population interaction between two populations of two different species where neither of them are benefitted is called ______.

1. predation
2. parasitism
3. commensalism
4. competition

Q. Total number of biodiversity hotspots in the world are

1. 24
2. 34
3. 12
4. 25

Q. One of the following statement is incorrect with reference to biodiversity. Identify it

1. Biodiversity increases with higher altitudes to lower altitudes
2. Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc
3. The richest reservoirs of animal and plant life (species richness) with few or no threatened species are called 'biodiversity hot spots'
4. Biodiversity decreases from equator to polar regions

Q. Read the following statements (1 - 4) related to competition and select the correct option stating true (T) and false (F)

1. Competitively superior species will eliminate the inferior ones if resources are limited
2. In Galapagos islands, the extinction of the Abingdon tortoise was due to overgrazing by deer.
3. In intraspecific competition, the competing organisms belong to different species
4. In interspecific competition, the competing organisms belong to different species

1. 1 - T, 2 - F, 3 - T, 4 - F
2. 1 - T, 2 - F, 3 - F, 4 - T
3. 1 - F, 2 - F, 3 - T, 4 - T
4. 1 - F, 2 - T, 3 - F, 4 - T

Q. A high density of deer population in an area can result in

1. Predation
2. Interspecific competition
3. Intraspecific competition
4. Proto co-operation

Q. When individuals of the same species maintain territories and compete with each other for resources, it is called as ___.

Q.

Will geographical isolation be a major factor in the speciation of an organism that reproduces asexuall? Why or why not?

Q. Ritu saw a picture of the silver carp in her book. She was curious to know more about this fish and started searching the internet where she found that in the 1900s, the silver carp which is actually native to Asia, escaped from the fish farms to Missouri lake in the US. This
I. led to decrease in the population of paddlefish found in the Missouri lake
II. adversely affected the overall balance of the lake ecosystem
III. led to the reduction in the number of predators feeding on paddlefish

Select the correct statements.

1. I & II
2. II & III
3. I & III
4. I, II & III

Q. Two of the bird species on the island are herbivores that both inhabit the same species of tree and eat the fruit the tree produces year-round. Which of the following helps both species to inhabit the tree without competing for resources?

1. One species lives in the top 30 percent of the tree and the other species lives in the lower 70 percent.
2. One species is nocturnal and the other is active during the day.
3. Reproductive isolation exists.
4. The species have differing beak shapes.
5. One species must become extinct.

Q. Symbiosis is an interaction between two species in which ________.

1. Both live together in direct contact
2. One benefits and the other is neither helped nor harmed
3. Both benefit
4. One benefits and the other is harmed

Q. Assertion :Generally the intraspecific competition is more intense than interspecific competition. Reason: Intraspecific competition occurs when the resources are in short supply.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. A high density of deer population in an area can result in

1. interspecific competition
2. intraspecific competition
3. predation
4. proto co-operation

Q.

The self regulatory check on rate of reproduction is

1. Struggle with environment

2. Intra specific struggle

3. Inter specific struggle

4. Inter genetic struggle

Q. What type of interaction exists between two individuals in which one of them prevents the other from utilizing the particular limited resource of an ecosystem?

1. Predation
2. Commensalism
3. Mutualism
4. Parasitism
5. Interspecific competition

Q. Is competition more acute between the individuals of the same species or those of different species? Explain.

Q. Intraspecific competition is competition among

1. Populations and their regulatory factors
2. Individuals of a community
3. Individuals of a population
4. Species

Q. Which one of the following is not observed in biodiversity hotspots?

1. Lesser inter-specific competition
2. Species richness
3. Endemism
4. Accelerated species loss

Q. To keep a population balanced; the reproduction is a phenomenon, another opposite to keep it less is

1. Biotic control
2. Fecundity
3. Mortality
4. Normality