All Free Biology MCQs with Answers

• A. Vessels
• B. Companion cells
• C. Sieve tubes
• D. Both (a) and (b)

Explanation: The correct answer is both (a) and (b). Angiosperms have unique vascular tissues, such as vessels and companion cells, which are not found…

• A. Sunflower
• B. Wheat
• C. Mulberry
• D. Maize

Explanation: Dioecious plants, such as Mulberry, have separate male and female individuals, meaning individual plants are either male or female, not…

• A. Uniparous cyme
• B. Biparous cyme
• C. Multiparous cyme
• D. Cymose capitulum

Explanation: The correct answer is multiparous cyme. In this type, the main axis culminates in a flower and branches into three or more daughter axes…

• A. Fruit
• B. Seed
• C. Endosperm
• D. Perisperm

Explanation: The ripened and fertilized ovule is called a seed. Seeds are crucial for plant reproduction and consist of three main components: the…

• A. Liverworts
• B. Mosses
• C. Psilopsida
• D. Onion

Explanation: The correct answer is Liverworts. Liverworts are the simplest form of non-vascular plants and lack true roots, stems, or leaves.

• A. Atropa belladonna
• B. Taxus baccata
• C. Narcissus spp.
• D. Both (a) & (b)

Explanation: The correct answer is Atropa belladonna, which is the scientific name for deadly nightshade.

• A. Mycelium
• B. Hyphae
• C. Protonema
• D. Bud

Explanation: Mycelium is part of the fungi kingdom and is the network of threads, called hyphae and a bud is an undeveloped or embryonic shoot so…

• A. Club moss
• B. Horsetail
• C. Sphagnum moss
• D. Fern

Explanation: Sphagnum moss because it can be used as carbon or coal for heating

• A. Pinus
• B. Ferns
• C. Marchantia
• D. Maize

Explanation: Double fertilization of this type is unique to flowering plants (angiosperms) so the correct option is B i.e ferns

• A. Sphenopsida
• B. Peat Moss
• C. Club moss
• D. Maiden hair ferns

Explanation: Sphagnum is also called bog moss or sphagnum moss

• A. Pteris
• B. Tmesipteris
• C. Dryopteris
• D. Pteridium

Explanation: Tmesipteris is actually a genus of ferns belonging to the class Psilotopsida within the sub-division Psilophytina.

• A. Periderm
• B. Protoderm
• C. Periblem
• D. Bark

Explanation: The living phloem, cork and cork cambium is collectively called Bark.

• A. Lycopsida
• B. Sphenopsida
• C. Dicot
• D. Monocot

Explanation: Monocots (monocotyledons) typically have a scattered vascular bundle and they are collateral and closed.

• A. Haploid
• B. Diploid
• C. Monoploid
• D. Both (B) & (C)

Explanation: In bryophytes, the sporophyte is diploid, which means it has two sets of chromosomes.

• A. Cometics
• B. Plastics
• C. Pudding
• D. Medicines

Explanation: Carrageenan is a natural ingredient derived from certain types of red seaweed.

• A. Archegonium
• B. Egg
• C. Oosphere
• D. Both (B) & (C)

Explanation: In bryophytes, the archegonium is the structure that contains the egg cell.

• A. Lycopsida
• B. Sphenopsida
• C. Psilopsida
• D. Pteropsida

Explanation: The dichotomous or Y-shaped branching is actually seen in the subphylum Psilopsida.

• A. Mitosis
• B. Meioses
• C. Conjugation
• D. Fission

Explanation: Bacteria reproduce primarily by binary fission, an asexual process whereby a single cell divides into two.

• A. Photosynthetic bacteria
• B. Autotrophic bacteria
• C. Cyanobacteria
• D. Chlamydomenas

Explanation: Cyanobacteria, also known as blue-green algae, are the simplest oxygen-producing organisms.

• A. Coccus bacterium
• B. Bacillus bacterium
• C. Spirillus bacterium
• D. Nitrobacterium

Explanation: Salmonella typhosa is the scientific name for the bacillus bacterium responsible for causing typhoid fever, a severe and potentially…