Free Biodiversity and Variety of Life MCQs with Answers
3,130 Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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- A. Pinus
- B. Dryopteris
- C. Cycas
- D. Both a and c
Explanation: Gymnosperms like Pinus and Cycas have transfusion tissue for nutrient transport.
Correct answer: Both a and c- A. Petiole
- B. Ligule
- C. Bract
- D. Spathe
Explanation: Ligule is present in Selaginella (a heterosporous pteridophyte) showing seed-like habit.
Correct answer: Ligule- A. 640
- B. 300
- C. 1000
- D. 900
Explanation: Gymnosperms are a group of seed-producing plants that include cycads, conifers, ginkgo, and gnetophytes. They are not a single family.
Correct answer: 1000- A. Liverworts
- B. Marchantia
- C. Riccia
- D. Funaria
Explanation: In Marchantia, elaters help in the dispersal of spores by twisting as they dry out.
Correct answer: Marchantia- A. Proteinaceous centre and starchy sheath
- B. Core of nucleic acid surrounded by protein sheath
- C. Core of protein surrounded by fatty sheath
- D. Core of starch surrounded by sheath of protein
Explanation: Pyrenoids help in starch synthesis and consist of a central protein body with a starchy covering.
Correct answer: Proteinaceous centre and starchy sheath- A. Solanaceae
- B. Brassicaceae
- C. Fabaceae
- D. Asteraceae
Explanation: In Asteraceae, stamens are epipetalous (attached to petals) and syngenesious (anthers united, filaments free).
Correct answer: Asteraceae- A. Fabaceae
- B. Asteraceae
- C. Solanaceae
- D. Liliaceae
Explanation: Asteraceae is characterized by a special type of inflorescence called capitulum (head) which is a key feature used for its identification.
Correct answer: Asteraceae- A. Asteraceae
- B. Labiatae
- C. Solanaceae
- D. Fabaceae
Explanation: In Asteraceae, syngenesious stamens are present, where anthers are fused into a tube, but filaments remain free.
Correct answer: Asteraceae- A. Crotalaria juncea
- B. Cycas revoluta
- C. Cicer arietinum
- D. Casuarina equisetifolia
Explanation: Casuarina has actinorhizal nodules that contain Frankia, a filamentous nitrogen-fixing bacterium.
Correct answer: Casuarina equisetifolia- A. Liliaceae
- B. Asteraceae
- C. Brassicaceae
- D. Solanaceae
Explanation: Solanaceae plants have pentamerous, actinomorphic flowers, a bicarpellary ovary with oblique septa, and produce capsules or berries.
Correct answer: Solanaceae- A. Litchi
- B. Custard apple
- C. Pomegranate
- D. Orange
Explanation: In Litchi, the edible portion is the aril, a juicy, fleshy outgrowth surrounding the seed.
Correct answer: Litchi- A. Cruciferae
- B. Malvaceae
- C. Solanaceae
- D. Lilliaceae
Explanation: In tetradynamous condition, there are six stamens, 4 are long and 2 are short i.e., 4 + 2 arrangement of stamens.
Correct answer: Cruciferae- A. Animalia
- B. Plantae
- C. Fungi
- D. Protista
Explanation: Marchantia (liverwort), Pinus (pine), and Mangifera (mango) are all multicellular, photosynthetic organisms with cell walls made of…
Correct answer: Plantae- A. Ciliated spermatozoa instead of flagellated spermatozoa
- B. Sporophyte as the main generation instead of the gametophyte generation
- C. Flagellated spermatozoa can travel
- D. Non-motile eggs
Explanation: Bryophytes (such as mosses) and ferns share a common need for water during fertilization because of their reliance on flagellated sperm…
Correct answer: Flagellated spermatozoa can travel- A. Glycyrrhiza glabra
- B. Cassia alata
- C. Bamboo
- D. Both bamboo and Glycyrrhiza glabra
Explanation: Bambusa (Bamboo) are used as building material for the thatching huts, making boats, carts, pipes etc.
Correct answer: Bamboo- A. Reproductive
- B. Digestive
- C. Respiratory
- D. None of the above
Explanation: Antheridia is the male sex organ, and is a haploid structure whose function is to produce male gametes called antherozoids or sperms.
Correct answer: Reproductive- A. Raceme
- B. Spike
- C. Cyme
- D. Panicle
Explanation: The inflorescence in which the main axis is elongated and bears sessile flowers is called a spike.
Correct answer: Spike- A. Corm
- B. Node
- C. Rhizome
- D. Tendril
- E. Tuber
Explanation: Nodes are not a type of plant stem but rather a specific part of a stem.
Correct answer: Node1879. Gymnosperms are NOT?
- A. Seed plants
- B. Predominantly diploid
- C. Flowering plants
- D. Conifers
- E. Naked seed plants
Explanation: Gymnosperms are not flowering plants. The term "gymnosperm" means "naked seed." Gymnosperms produce seeds that are not enclosed within a…
Correct answer: Flowering plants- A. They produce a pollen tube
- B. They produce wind-dispersed pollen
- C. The sporophyte generation is dominant
- D. They use animals to disperse their seeds
- E. They produce fruits
Explanation: Angiosperms differ from all other plants because they have several unique characteristics that set them apart.
Correct answer: They produce fruits