All Free Biology MCQs with Answers

• A. Robin
• B. Kestrel
• C. Eagle
• D. Kiwi

Explanation: The kiwi is the best-known example of a bird in which both ovaries are functional.Kiwis are primitive, flightless birds (ratites), and…

• A. Dugesia
• B. Schistostoma
• C. Fasciola
• D. Taenia

Explanation: Taenia: Has proglottids. Taenia is a type of tapeworm, and proglottids are segments of its body containing reproductive organs.

• A. Hydrocarbons
• B. Organic molecules
• C. Chemicals
• D. All of these

Explanation: An animal's survival does depend on its ability to take chemicals from the environment.

• A. Muscle tissues
• B. Hydrostatic skeleton
• C. Parapodia
• D. Bones

Explanation: The locomotory organs in annelids include parapodia, suckers, and setae. Annelids are segmented worms that belong to the phylum Annelida.

• A. Triploblastic
• B. Bilateral Symmetry
• C. Coelomate
• D. Flatworms

Explanation: Platyhelminthes are not coelomates; instead, they are acoelomates. They lack a true body cavity between the body wall and the digestive…

• A. Peritandrous
• B. Pertandrous
• C. Protonema
• D. Protandrous

Explanation: Protandry is a reproductive strategy where an organism starts as a male and later becomes a female.

• A. Nephridia
• B. Flame cells
• C. Malpighian tubules
• D. Nephron

Explanation: The excretory system of Platyhelminthes consists of flame cells because these specialized cells help remove metabolic waste from the…

• A. Gastropoda
• B. Cephalopoda
• C. Bivalvia
• D. None of these

Explanation: The garden snail is a part of the class Gastropoda within the phylum Mollusca.

• A. Spicules
• B. Choanocytes
• C. Gemmules
• D. Both Options A and B are correct

Explanation: Spicules are the structural components of a sponge, or the "bricks," and the shapes, sizes, and composition are unique for each…

• A. Acoelomates
• B. Pseudococlomates
• C. Aeoclomates and Pscudocoelomates
• D. Coelomates

Explanation: Acoelomates are those animals in which there is no body cavity or space between body wall and digestive system.

• A. Hydra
• B. Euplectella
• C. Blood fluke
• D. Tapeworm
• E. A and b

Explanation: Hydra is another example of an animal that doesn't show division of labor. It has limited cell specialization and lacks distinct organs.

• A. Stipules
• B. Brails
• C. Spine
• D. Spicules

Explanation: Based on the explanations provided, the correct answer to the question is option D) Spicules.

• A. Aname
• B. Anima
• C. Anemia
• D. None of these

Explanation: Yes, the word animal is derived from the Latin word anima, which means "breath, spirit, life".

• A. Presence of true coelom and metamerism
• B. Absence of true coelom and metamerism
• C. Presence of true coelom but the absence of metamerism
• D. Absence of true coelom but thepresence of metamerism

Explanation: Ascaris does not have a true coelom. Ascaris is an example of a pseudocoelomate organism.

• A. Zygomycota
• B. Basidiomycota
• C. Deuteromycota
• D. Ascomycota

Explanation: Mushrooms are classified under Basidiomycota, known as club fungi.

• A. Autotrophs
• B. Saprotrophs
• C. Parasites
• D. Predators

Explanation: Fungi that absorb nutrients directly from the living host cytoplasm are called Parasites.

• A. 2-3
• B. 2-5
• C. 5-7
• D. 2-9

Explanation: Fungi can survive in a wide pH range from 2 to 9.

• A. Basidiomycota
• B. Ascomycota
• C. Deutromycota
• D. Zygomycota

Explanation: These are common molds that belong to the Zygomycota division.

• A. Zygomycota
• B. Ascomycota
• C. Basidiomycota
• D. Deuteromycota

Explanation: Mushrooms are fruiting bodies of Basidiomycota.

• A. Danger stools
• B. Toad stools
• C. Break stools
• D. Dark stools

Explanation: Poisonous mushrooms commonly called toadstools.