Explore topic-wise MCQs in Biology.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

Which organisms eat each other and form various levels of the food pyramid?

A. Carnivore
B. Omnivores
C. Herbivore
D. Decomposer
Answer» B. Omnivores
2.

What is the reason for energy flow from one organism to another?

A. Competition
B. Mutualism
C. Commensalism
D. Predation
Answer» E.
3.

What is Encarsia perplexa example of?

A. Klepto-parasite
B. Adelpho-parasite
C. Endo-parasite
D. Ecto-parasite
Answer» C. Endo-parasite
4.

Which is an example of a parasite, in which the host species is closely related to the parasite and is a member of the same family or genus?

A. Endo-parasite
B. Klepto-parasite
C. Adelpho-parasite
D. Ecto-parasite
Answer» D. Ecto-parasite
5.

In which interaction does a parasite steal food gathered by the host?

A. Adelpho-parasitism
B. Klepto-parasitism
C. Endo-parasitism
D. Ecto-parasitism
Answer» C. Endo-parasitism
6.

What is a protozoan living in the digestive tract of a flea living on a dog is an example of?

A. Endo-parasitism
B. Klepto-parasitism
C. Hyper-parasitism
D. Ecto-parasitism
Answer» D. Ecto-parasitism
7.

What is a relationship in which one parasite feeds on another parasite which in turn feeds on its host called?

A. Pathogen
B. Vector
C. Vehicle
D. Epi-parasite
Answer» E.
8.

In which the organism s abdomen does Sacculina live?

A. Shark
B. Dolphin
C. Crab
D. Cattle
Answer» D. Cattle
9.

Who transmits malaria-causing protozoan?

A. Protists
B. Male Anopheles mosquito
C. Fungi
D. Female Anopheles mosquito
Answer» E.
10.

What is an organism carrying another organism to the host called?

A. Parasite
B. Vector
C. Pathogen
D. Bacteria
Answer» C. Pathogen
11.

Where do endo-parasites reside?

A. Within the cells of the host body
B. On the surface of the host body
C. Outside the skin of the host
D. Outside the host environment
Answer» B. On the surface of the host body
12.

Where do ectoparasites reside?

A. Within the blood
B. In the intercellular spaces of host
C. Within the cells
D. On the surface of the host
Answer» E.
13.

What is a relationship in which larval development of one organism occurs inside or on the surface of another organism resulting in the death of the host called?

A. Symbiont
B. Parasitoid
C. Commensalism
D. Mutualism
Answer» C. Commensalism
14.

What is a relationship between organisms of different species where an organism is benefited and other is harmed called?

A. Parasitism
B. Commensalism
C. Mutualism
D. Competition
Answer» B. Commensalism
15.

Who does a pilot fish accompanies for feeding on falling pieces of food?

A. Shark
B. Hermit crab
C. Dolphin
D. Lobster
Answer» B. Hermit crab