Free Biodiversity and Variety of Life MCQs with Answers

• 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…

• A. Rhizobium
• B. Bacillus
• C. Nitrosomonas
• D. Nitrobacter

Explanation: Nitrobacter is the correct answer because it is involved in the second step of nitrification, where it converts nitrite (NO2) to nitrate…

• A. Slime mold
• B. Water mold
• C. Cyanobacteria
• D. Cyanobacteria Algae ponds

Explanation: The correct answer is Cyanobacteria Algae ponds. Cyanobacteria, often called blue-green algae, can form dense blooms in water, releasing…

• A. Hormogonia
• B. Akinetes
• C. Endospores
• D. Zygospores

Explanation: Endospores are the correct answer because they are specialized, durable structures that allow bacteria to survive in unfavorable…

• A. Atrichous
• B. Lophotrichous
• C. Amphitrichous
• D. Peritrichous

Explanation: Bacteria are classified based on the arrangement of their flagella, which affects their motility.

• A. Phycocyanin
• B. Phycoerythrin
• C. Phycobillirubin
• D. Phycobilliprotein

Explanation: The microbes also contain the same chlorophyll a compound used by plants.

• A. Sugar and amino acids
• B. Calcium pectate
• C. Glycoprotein
• D. Peptidoglycan

Explanation: Bacterial cell walls are made of peptidoglycan, also called as murein, which is made from polysaccharide chains cross-linked by unusual…

• A. Alpha-Protobacteria
• B. Beta-Protobacteria
• C. Gamma-Protobacteria
• D. Delta-Protobacterla

Explanation: Proteobacteria is a phylum of gram-negative bacteria. The Proteobacteria are further divided into 5 classes: Alphaproteobacteria…

• A. Ecological time
• B. Population time
• C. Growth time
• D. Generation time

Explanation: Generation time is the time it takes for a population of bacteria to double in number or the interval between two successive divisions in…

• A. Lag phase
• B. Log phase
• C. Die
• D. Generation time

Explanation: After the lag phase, bacterial cells enter the exponential or log phase.