Free Biodiversity and Variety of Life MCQs with Answers

• A. Elephants
• B. Whales
• C. Sharks
• D. Anacondas

Explanation: Whales are the correct answer because it doesn't have muscles and can easily swim in large water bodies.

• A. Earthworm
• B. Sparrow
• C. Humans
• D. Lizard

Explanation: Haemoglobin is a protein found in the red blood cells of many animals, including humans.

• A. Protozoan
• B. Algae
• C. Slime molds
• D. Bacteria

Explanation: Protozoans are considered ancestors of animals because they transitioned to multicellular organisms early in evolution.

• A. Crayfish
• B. Jellyfish
• C. Vertebrate
• D. Starfish

Explanation: Answer is "Vertebrate"Explanation: A sliver fish (Lepsima saccharina) is small primitive wingless insect.

• A. Development of adhesive organs
• B. Loss of digestive organs
• C. Loss of reproductive capacity
• D. Loss of unnecessary sense organs

Explanation: Parasitism is a relationship between two living organisms of different species in which one organism called a parasite obtains its food…

• A. Amoeba proteus
• B. Trypanosoma gambiense
• C. Plasmodium vivax
• D. Paramecium caudatum

Explanation: Dimorphic nucleus means that two types of nuclei are present in P. caudatum - a large macronucleus and a small micronucleus.

• A. Osmoregulation
• B. Reproduction
• C. Locomotion
• D. Digestion of food

Explanation: The function of contractile vacuole is osmoregulatory. Water in freshwater protozoa enters the organism by endosmosis and during feeding.

• A. Australia
• B. Antarctica
• C. Africa
• D. America

Explanation: Penguins are a group of aquatic, flightless birds living almost exclusively in Antarctica.

• A. Coelom
• B. Mesoderm
• C. Special transport system
• D. Coelomic fluid

Explanation: Acoelomates are triploblastic animals in which all the three germinal layers ectoderm. mesoderm and endoderm are present.

• A. Platyhelminthes
• B. Aschelminthes
• C. Molluscs
• D. Annelids

Explanation: Examples of acoelomates are found phylum Platyhelminthes, commonly known as flatworms.

• A. Mesoderm
• B. Epiderm
• C. Endoderm
• D. Ectoderm

Explanation: The coelom is a fluid-filled cavity which is lined by the mesoderm. It is present in between the gastrointestinal tract and the body wall.

• A. Tapeworm
• B. Liver fluke
• C. Aurelia
• D. Planaria

Explanation: This belongs to phylum platyhelminthes, class Cestoda, being exclusively endoparasite.

• A. Ectoparasite
• B. Facultative parasite
• C. Obligate parasite
• D. Endoparasite

Explanation: Endoparasites are parasites that live in the tissues and organs of their hosts, such as tapeworms, flukes, and protozoans of vertebrates.

• A. Nervous System
• B. Muscular and skeletal system
• C. Alimentary canal lining
• D. Mouth

Explanation: The mesoderm layer contributes to the development of the skeleton (bone and cartilage) and the muscular system.

• A. Porifera
• B. Annelida
• C. Cnidaria
• D. Nematodes

Explanation: Polymorphism is a notable feature of cnidarians. Many cnidarians have multiple forms within their life cycle, including the polyp and…

• A. Each body segment has two sets of male and female reproduction organs
• B. The digestive tract develops from endodermal cells in the embryo
• C. The body can be cut into two parts, which are mirror images of each other, in one plane only
• D. None of the above

Explanation: Based on the explanations provided, the correct answer to the question is option A) Each body segment has two sets of male and female…

• A. Absence of mesoderm
• B. Absence of brain
• C. Coelom that is incompletely lined with a mesoderm
• D. Solid body without a cavity surrounding internal organs

Explanation: This is the correct characteristic of acoelomates. Acoelomates are organisms with a solid body plan, meaning they lack a fluid-filled body…

• A. Sycon
• B. Leucosolenia
• C. Spongilla
• D. Euplectella

Explanation: "The explanation for this question will be added soon!".

• A. A
• B. B
• C. C
• D. D

Explanation: Leeches belong to class hirudinea, are ceolomates and triphloblastic. So option A is correct. All other options are incorrect.

• A. webbed toes
• B. thick fur on their bodies
• C. mammary glands to feed their new-borns
• D. the same opening for excretion and reproduction

Explanation: The characteristic of prototherians that provides evidence of mammalian evolution from reptiles is the presence of a cloaca.