Organisms and Populations Test

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Organisms and Populations Test - 28

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Weekly Quiz Competition

Question 1
1 / -0

An example of a parasitic plant which is strictly epiphytic is

A
Cuscuta

B
Viscum

C
Orobanche

D
Rafflesia

Solution

All plants are not autotrophs. The heterotrophic plants can be- parasites, insectivorous or saprophytes. The parasites may be complete or partial. Viscum and Loranthus are common examples of partial stem parasites, which grow as parasitic epiphytes on host plants but can carry out photosynthesis and manufacture their own food.
Question 2
1 / -0

In Nepenthes, the pitcher is formed from

A
Leaf base

B
Lamina

C
Leaf apex

D
Stipule

Solution

Nepenthes, popularly known as tropical pitcher plants, is a genus of carnivorous plant in the family Nepenthaceae. In Nepenthes (pitcher plant), the lamina is itself modified into a pitcher, the lid is the leaf apex, coiled stalk is the petiole and basal expanded part is the leaf base.
Thus, the correct answer is option B.
Question 3
1 / -0

Viscum is

A
Total root parasite

B
Partial root parasite

C
Total stem parasite

D
Partial stem parasite

Solution

Most of the plants are autotrophic. However, some plants are heterotrophs and obtain their nutrition as parasites and saprotrophs. Some of the parasitic plants are Rafflesia (total root parasite), Cuscuta (total stem parasite), Viscum (partial stem parasite), Loranthus (partial stem parasite), Striga (partial root parasite) etc.
Thus, the correct answer is option D.
Question 4
1 / -0

Which of the following can be categorized as a parasite in true sense?

A
The female Anopheles mosquito sucks blood from human.

B
Human foetus developing in uterus draws nourishment from mother.

C
Head lice lives on human scalp and lays eggs on hair.

D
The cuckoo lays eggs in crows nest for subsequent parental care.
Solution
- The parasite is defined as the organism which survives on the body of the host organism for food and space to survive.
- The Anopheles mosquito feeding on the blood of animals, the human fetus developing in the womb of the mother, and derives the nourishment from the mother and the cuckoo laying eggs in the crow's nest are the interactions of the living organisms.
- The head lice living on the human scalp and lays eggs on hair cannot survive without this habitat and completely depends on the host.
Thus, the correct answer is option C.
Question 5
1 / -0

A total root parasite is

A
Dendrophthoe

B
Orobanche

C
Viscum

D
Santalum

Solution

Most of the plants are autotrophic. However some plants are heterotrophs and obtain their nutrition as parasites and saprotrophs. Some of the parasitic plants are Rafflesia (total root parasite), Cuscuta (total stem parasite), Viscum (partial stem parasite), Loranthus (partial stem parasite), Striga (partial root parasite), Balanophora (total root parasite), Orobanche (total root parasite) etc. Orobanche is a leafless parasite growing in the roots of plants like brinjal, potato and mustard. Thus, the correct answer is option B.
Question 6
1 / -0

Remora is attached to shark, this association is

A
Parasitism

B
Commensalism

C
Mutualism

D
Predation

Solution

Remora is also called as the sharksucker or suckerfish and is any of the eight species of marine fishes noted for attaching themselves to the sharks. Remoras adhere by means of a flat, oval sucking disk on the top of the head. The relationship between a Remora and its host is considered to be commensalism, as Remora is getting its food and shark gets no benefit.
Thus, the correct answer is option B.
Question 7
1 / -0

What is common for Cuscuta, ticks and leeches?

A
They are all autotrophs

B
They are all plants

C
They are all parasites

D
They are all animals
Solution
Cuscuta, ticks, and leeches show the parasitic mode of nutrition.
Cuscuta winds around plants and penetrates into the host stems via, haustoria, forming direct connections to the vascular bundles of their hosts to withdraw water, carbohydrates, and other solutes.
Ticks are large mites with leathery skin and in general, ticks are parasites of animals.
All of them feed on vertebrate blood.
Leeches are either predators (feeding on a variety of invertebrates) or blood-suckers (feeding on the blood of vertebrates).
Thus, the correct answer is option C.
Question 8
1 / -0

Cuscuta is an example of :

A
Brood parasitism

B
Predation

C
Endoparasitism

D
Ectoparasitism

Solution

Cuscutta (Amarbel) is a total stem parasite that grows on a number of plants like - Citrus, Duranta, Zizyphus, etc. It sends a number of haustoria into the host. Xylem and phloem of haustorium make connection with sap and food channel of host. Predation is an interaction in which member of one species capture, kill and eat up member of Endoparasite lives inside the host body.

So, the correct answer is 'Ectoparasitism'.
Question 9
1 / -0

Some epiphytes are also referred to as space parasites because they

A
Compete with the species on which they are growing for food.

B
Occupy large land space.

C
Take food and support from the plant on which they are growing.

D
May choke the species supporting them by their luxuriant growth.

Solution

The epiphytes are the plant species which can grow on the surface of the other plants. These are called as space parasites because they just need space to grow as the food is synthesized and water is absorbed from the atmosphere. They are referred by this name for the reason that they grow so profusely that they may choke or block the growth and photosynthesis of the plant on which it is growing.
Thus, the correct answer is option D.
Question 10
1 / -0

Which of the following is the insectivorous plant?

A
Hydrilla

B
Ranunculus

C
Utricularia

D
Castor
Solution
Solution

Correct answer is option C.

Explanation for correct option
- Insectivorous plants are the plants that trap insects and withdraw nutrition from them. Example: Drosera, Nepenthes, Utricularia etc
- Bladder traps are found in bladderwort plants (genus Utricularia) which actively suck in small organisms using a partial vacuum in order to obtain nutrition.

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Re-Attempt Weekly Quiz Competition

Organisms and Populations Test - 28

Result

Organisms and Populations Test - 28

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SHARING IS CARING

Question 1

Cuscuta

Viscum

Orobanche

Rafflesia

Solution

Question 2

Leaf base

Lamina

Leaf apex

Stipule

Solution

Question 3

Total root parasite

Partial root parasite

Total stem parasite

Partial stem parasite

Solution

Question 4

The female Anopheles mosquito sucks blood from human.

Human foetus developing in uterus draws nourishment from mother.

Head lice lives on human scalp and lays eggs on hair.

The cuckoo lays eggs in crows nest for subsequent parental care.

Solution

Question 5

Dendrophthoe

Orobanche

Viscum

Santalum

Solution

Question 6

Parasitism

Commensalism

Mutualism

Predation

Solution

Question 7

They are all autotrophs

They are all plants

They are all parasites

They are all animals

Solution

Question 8

Brood parasitism

Predation

Endoparasitism

Ectoparasitism

Solution

Question 9

Compete with the species on which they are growing for food.

Occupy large land space.

Take food and support from the plant on which they are growing.

May choke the species supporting them by their luxuriant growth.

Solution

Question 10

Hydrilla

Ranunculus

Utricularia

Castor

Solution

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