Free Biodiversity and Variety of Life MCQs with Answers

2011. The role of endosperm tissue of seed is to

• A. Protect the female gametes
• B. Produce the female gametes
• C. Secrete enzymes for seed
• D. Provide nutrition to the developing embryo

Explanation: The correct answer is:Provide nutrition to the developing embryo.The endosperm is a tissue produced inside the seeds of most flowering plants following fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This crucial role supports the embryo's development into a seedling. Option A is incorrect because protecting female gametes is not related to the function of endosperm. Option B is incorrect because female gametes are produced by the ovule, not the endosperm. Option C is incorrect because secreting enzymes is not the main function of the endosperm.

2012. An example of a monocot leaf is:

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: The correct option is C (Wheat leaf), as wheat is an example of a monocot plant. Monocots typically have leaves with parallel venation.

2013. The significance of heterospory in plants is that:

• A. Helps in seed formation
• B. Ensures the development of motile sperms
• C. Provides an efficient way of spore dispersion
• D. Helps in the production of independent gametophytes

Explanation: The correct answer is option D. Heterospory helps in the production of independent gametophytes. Heterospory is the production of two distinct types of spores: microspores and megaspores, which develop into male and female gametophytes respectively.

2014. The given diagram shows a Marchantia thallus (liverwort).The function of structure x:

• A. Provide protection
• B. Provide nourishment
• C. Help in gametes production
• D. Help in vegetative propagation

Explanation: The primary function of structure X is vegetative propagation.A gemma cup is a cup-shaped structure found on the surface of bryophytes (like liverworts and mosses) that produces gemmae. Its function is vegetative propagation as the gemmae are tiny, bud-like structures that are released from the cup to grow into a new, genetically identical plant.So option D is correct.

2015. Images of three flowers are given.Which of these is/are polypetalous?

• A. I only
• B. II only
• C. I and II
• D. II and III

Explanation: A polypetalous flower is one where the petals are separate and distinct from each other, meaning they are not fused together. This arrangement is present in both 2 and 3 flower.So option D is correct.

2016. The floral diagram of a flower is given.The floral formula for this flower is:

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: C is the correct floral formula for the plant given.This formula indicates the flower is zygomorphic (bilaterally symmetrical), bisexual, has a calyx of 5 fused sepals, a corolla with 5 petals arranged in a typical "papilionaceous" (butterfly-like) pattern, 10 stamens (usually with 9 fused and 1 free), and a single carpel with a superior ovary.

2017. Four students (A, B, C, D) drew the floral diagram for the given flower. Which student draw the correct floral diagram?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: The correct answer is Option A.Student A's floral diagram accurately represents the given flower's structure, showcasing the correct number and arrangement of floral parts.

2018. The structure of a plant that characterises a monocot plant is:

• A. Parallel venation in leaves
• B. Taproot system
• C. Two cotyledons
• D. Vascular bundles in a ring arrangement

Explanation: The correct answer is Option A: Parallel venation in leaves.Monocot plants are characterized by having leaves with parallel venation. This is a key structural feature that helps in identifying monocots.

2019. The FIRST group of plants that formed true leaves and roots was:

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

Explanation: The correct answer is Lycopsida.This group, also known as club mosses, is recognized as the first to develop true leaves and roots, a significant evolutionary advancement.

2020. In moss plant, the parts that constitute the gametophyte are located inside the:

• A. Leaves and Seta
• B. Seta and Capsule
• C. Shoots and Leaves
• D. Rhizoids and Capsule

Explanation: Leaves, stems, shoots rhizoids and reproductive organs are part of gametophyteso C is correct.