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. Guava
- B. Plum
- C. Brinjal
- D. Cucumber
Explanation: (b): If the gynoecium is situated in the center and other parts of the flower are located on the rim of the thalamus almost at the same…
Correct answer: Plum- A. Monadelphous
- B. Diadelphous
- C. Polyandrous
- D. Polyadelphous
Explanation: (a): China rose of Family Malvaceae possess numerous stamens. The filaments of stamens are united in one group thus forming a staminal…
Correct answer: Monadelphous- A. Cotyledon
- B. Endosperm
- C. Aleurone layer
- D. Plumule
Explanation: (a): Scutellum is the tissue in a grass wheat or maize seed that lies between the embryo and the endosperm.
Correct answer: Cotyledon- A. Opuntia
- B. Casuarina
- C. Hydrilla
- D. Acacia
Explanation: (a): Opuntia is a xerophytic plant that lives in a dry habitat. The plant has fleshy organs where water and mucilage are stored.
Correct answer: Opuntia- A. Option-A
- B. Option-B
- C. Option-C
- D. Option-D
Explanation: (d): In cotton, china rose and lady's finger margins of sepals or petals overlap that of the next one this mode of arrangement…
Correct answer: Option-D- A. Option-A
- B. Option-B
- C. Option-C
- D. Option-D
Explanation: (c): The plants belonging to the Family Fabaceae such as soybean, pea, sem, moong, gram, etc have the floral formula
Correct answer: Option-C- A. (i) and (iii)
- B. (i) and (ii)
- C. (ii) and (iii)
- D. (iii) and (iv)
Explanation: (b): Flowers in peas have diadelphous stamens. The floral formula for Solanaceae is
Correct answer: (i) and (ii)- A. Sorosis
- B. Syconus
- C. Caryopsis
- D. Hesperidium
Explanation: ( b): Syconous fruit develops from a hypanthium inflorescence, e.g..., Ficus.
Correct answer: Syconus- A. Dianthus
- B. lemon
- C. Marigold
- D. Argemone
Explanation: (c: In marigold of Asteraceae the ovary is superior, 2 or 3 locular, placentation is axile,ovules 1 to many per locule, style 1, stigma 2…
Correct answer: lemon- A. Walnut and Tamarind
- B. French bean and Coconut
- C. Cashew nut and Litchi
- D. Groundnut and Pomegranate
Explanation: (d): Groundnut is dry, one chambered, one seeded fruit developing from a superior biorpoly carpellary ovary.
Correct answer: Groundnut and Pomegranate- A. Coffee
- B. Lily
- C. Castor
- D. Cotton
Explanation: (c): In castor seed, testa, and tegmen are united together. The seed coat is tough and bright due to scleroprotein.
Correct answer: Castor- A. Berries
- B. Mericarps
- C. Achenes
- D. Samaras
Explanation: (c): Syconus develops from a hypanthodium type of inflorescence. The flask-shaped fleshy receptacle encloses a female flower which…
Correct answer: Achenes- A. Sunflower
- B. Pea
- C. Lemon
- D. Mustard
Explanation: (d): Replum is a false septum formed due to the ingrowth of the parietal placenta. This makes the ovary bilocular.
Correct answer: Mustard1814. The fruit is chambered, developed from the inferior ovary, and has seeds with succulent testa in
- A. Guava
- B. Cucumber
- C. Pomegranate
- D. Orange
Explanation: (c): In pomegranate, the whole fruit is covered by a hard rind made up of an exocarp and a part of mesocarp.
Correct answer: Pomegranate- A. Pea
- B. Maize
- C. Coconut
- D. Castor
Explanation: (a): During the process of the development of the embryo, the food stored up in the endosperm is continuously drawn up by the developing…
Correct answer: Pea- A. A multilocular monocarpellary flower
- B. A unilocular polycarpellary flower
- C. A multipistillate syncarpous flower
- D. A cluster of compactly borne flowers on a common axis.
Explanation: (d) : Pineapple is a sorosis type of fruit that develops from spike or spadix inflorescence.
Correct answer: A cluster of compactly borne flowers on a common axis.- A. Litchi
- B. Custard apple
- C. Pomegranate
- D. Orange
Explanation: (a): In litchi, aril forms the edible part in fruit. It is a collar-like outgrowth from the base of the ovule forming a kind of the third…
Correct answer: Litchi- A. Hairs
- B. Anthers
- C. Styles
- D. Ovaries
Explanation: (c): In maize the male inflorescence occupies the terminal position on the main axis, whereas the female inflorescence (ear or cob) is…
Correct answer: Styles- A. It reduces the vigor of the plant.
- B. It adversely affects the fertility of the plant.
- C. The seeds exhibit long dormancy.
- D. The seeds cannot be stored under normal conditions for the next season.
Explanation: (d): An annual plant is one that completes its life cycle in a single season i.e., a seed germinates and the mature plant so produced…
Correct answer: The seeds cannot be stored under normal conditions for the next season.1820. Edible part of mango is
- A. Endocarp
- B. Receptacle
- C. Epicarp
- D. Mesocarp
Explanation: (d): Mango (Mangif era indica) of Family Anacardiaceae is a drupe. The edible part in mango is mesocarp.
Correct answer: Mesocarp