Predation

Q. what is exotic species

Q.

What is the difference between parasites and predators?

Q.

What is the ecological principle behind the biological control method of managing with pest insects?

Q. Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

1. Predation
2. Competitive release
3. Mutualism
4. Resource partitioning

Q.

Name important defence mechanisms in plants against herbivory.

Q. In predation interaction, one species benefits and while it is detrimental to the other species.

1. True
2. False

Q.

Which one of the following is most appropriately defined?

1. Host is an organism which provides food to another organism.

2. Amensalism is a relationship in which one species is benefited whereas the other is unaffected.

3. Predator is an organism that catches and kills other organism for food.

4. Parasite is an organism which always lives inside the body of other organism and may kill it.

Q. Assertion: When certain exotic species are introduced into a new geographical area not native to them, they start spreading fast without a check and are termed "invasive".
Reason: The exotic species do not have its natural predators in that area.

1. Both assertion and reason are true and the reason explains the assertion
2. Both assertion and reason are true but reason does not explain the assertion
3. Assertion is true but reason is false.
4. Assertion is false and reason is true.

Q. What is the difference between predation and parasitism? Give examples. [3]

Q.

How do butterflies help the ecosystem?

Q.

What is called the gulf weed?

Q.

Define the following terms and give one example for each:

(a) Commensalism

(b) Parasitism

(c) Camouflage

(d) Mutualism

(e) Interspecific competition

Q.

Do female wasps show commensalism?

Q. Which ones are true about interdependence?
(a) One is benefitted and other unaffected in mutualism
(b) Both partners are benefitted in commensalism
(c) One kills and feeds on another in predation
(d) Both partners are benefitted in symbiosis

1. b and c only
2. a and b only
3. a and c only
4. c and d only

Q.

When Didinia and Paramecia are in same test tube, Didinia engulf all the Paramecia and then die of starvation. Didinia are the _______.

1. predator

2. competitor

3. native species

4. prey

Q. Mention how have plants developed mechanical and chemical defence against herbivores to protect themselves with the help of one example of each.

Q.

An interaction favourable to both the populations, but not obligatory to either is

1. Mutualism

2. Parasitism

3. Commensalism

4. Proto-cooperation

Q.

The phenomenon of one organism being benefitted without affecting the other is

	A	Scavenging
	B	Amensalism
	C	Commensalism
	D	Symbiosis

Q. How some of the aphids and other pests are kept under check in nature?

Q.

Name important defence mechanisms in plants against herbivory.

Q. Which of the following biological product is used to control diseases in plants?

1. Biopesticides
2. Biofertilizers
3. Biodiesel
4. Both A and C

Q. Select the statement which explains best parasitism.
(a) One organism is benefited.
(b) Both the organisms are benefited.
(c) One organism is benefited, other is not affected.
(d) One organism is benefited, other is affected.

Q.
Read the following statements and select the correct option.
Statement 1 The prickly pear cactus introduced into Australia in early 1920s caused by spreading rapidly into millions of hectares of rangeland
Statement 2 When certain exotic species are introduced into a geographical area, they become invasive and start spreading fast because the invaded land does not have its natural predators

1. Both statements 1 and 2 are are correct
2. statement 1 is correct but statement 2 is incorrect
3. statement 1 is incorrect but statement 2 is correct
4. Both statement 1 and 2 are incorrect

Q. Of the group of organisms described, which one would be considered to have the highest fitness, in evolutionary terms?

1. A raccoon that demonstrates resistance to rabies
2. A 105-year old woman with one child
3. A sea turtle that lays a hundred eggs, 12 of which develop into adult sea turtles
4. A cheetah that is the fastest of its siblings
5. A male gorilla that is the strongest of all the males in its band

Q. Assertion :In obligate mutualism both the population are benefitted and neither can survive under natural condition without other. Reason: Both populations are benefitted by the association but their relationships are not obligatory.

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. What is predation?

1. Predation is consumption of one organism by another.
2. Predation is the interaction between herbivores and carnivores.
3. Predation is the interaction between animals and plants.
4. None of these

Q. Assertion :Plant animal interaction do not generally involve co-evolution of the mutuality organism Reason: Evolution of the plants and animals can never go side by side.

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.

Regarding assertion and reason, select the right option.

Assertion [A]: A carnivore can be a predator for another carnivore.

Reason [R]: Predation does not limit itself to a carnivore eating a herbivore. Predation is a type of interaction where some organisms eat other organisms.

1. Both A and R are correct and R explains A
2. Both A and R are correct and R does not explain A
3. A is correct but R is incorrect
4. Both A and R are incorrect

Q. Match column I with column II, and choose the correct
combination from the options given below.

Column I (Interaction)	Column II (Example)
$1.$ Predation	$a.$ Cuscuta and Hedge plants
$2.$ Commensalism	$b.$ Balanus and Chthamalus
$3.$ Parasitism	$c.$ Cactus and Moth
$4.$ Competition	$d.$ Orchid and Mango

1. $1$ $2$ $3$ $4$
   $a$ $c$ $b$ $d$
2. $1$ $2$ $3$ $4$
   $d$ $c$ $b$ $a$
3. $1$ $2$ $3$ $4$
   $c$ $d$ $b$ $a$
4. $1$ $2$ $3$ $4$
   $c$ $d$ $a$ $b$

Q. In predation interaction, the beneficial organism is known as (i)______ while the detrimental one is called (ii)_______.

1. (i) prey; (ii) predator
2. (i) parasite; (ii) host
3. (i) host; (ii) predator
4. (i) predator; (ii) prey