Free Biodiversity and Variety of Life MCQs with Answers

1881. Gymnosperms are referred to as "naked-seeded plants", because:

• A. They lacks ovule
• B. They lacks ovaries
• C. The embryo is unprotected
• D. They have no seed coat

Explanation: Gymnosperms produce seeds that are not enclosed within ovaries. Instead, the ovules (structures containing female gametes or eggs) are exposed on the surface of cone scales. The term "gymnosperm" means "naked seed." The seeds of gymnosperms are not protected within a fruit, as is the case with angiosperms. Instead, they are often borne on the scales of cones.

1882. Which of the following is included in Bryophytes?

• A. Mosses
• B. Club mosses
• C. Ferns
• D. Seed plants
• E. Horse tails

Explanation: Bryophytes are non-vascular plants classified under the division Bryophyta. They consist of three main groups: mosses, liverworts, and hornworts. Mosses are indeed bryophytes, characterized by their simple structure lacking true roots, stems, and leaves. Instead, they have rhizoids for anchorage and nutrient absorption.

1883. The botanical name of Imli is:

• A. Cassia fistula
• B. Mimosa pudica
• C. Tamarindus indica
• D. Datura alba
• E. Rosa indica

Explanation: The botanical name for tamarind, commonly known as "imli" in Hindi, is Tamarindus indica. Tamarind is a tropical tree that produces a sour fruit used in various culinary applications, such as cooking, condiments, and beverages. The tree is part of the Fabaceae family and is native to tropical Africa but is now cultivated in many tropical regions around the world.

1884. Which one of the following is not in the group of Gymnosperm?

• A. Cycads
• B. Gingko
• C. Gnetum
• D. Conifers
• E. Musci

Explanation: The term "Musci" refers to the taxonomic division Musci, which includes the bryophytes commonly known as mosses. Mosses are small, non-vascular plants that belong to the phylum Bryophyta. They are one of the three main groups of bryophytes, alongside liverworts (Hepaticophyta) and hornworts (Anthocerotophyta).

1885. The botanical name of gum tree is:

• A. Acacia nilotica
• B. Mimosa pudica
• C. Acacia catechu
• D. Prosopis glandulosa
• E. Albizia lebbeck

Explanation: The botanical name for the gum tree commonly known as Acacia nilotica. Acacia nilotica belongs to the genus Acacia and is a deciduous tree native to Africa, the Middle East, and the Indian subcontinent. It is also known by various other names, including gum arabic tree, Egyptian thorn, babul, or prickly acacia. The species is characterized by its compound leaves, thorny branches, and small, yellow, puffball-like flowers.

1886. The floral formula of family Mimosaceae is:

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

Explanation: The floral formula of family Mimosaceae is ⊕,⚥,K(5), C5 or (5), A α or 10 ,G.

1887. The scientific name of potato is Solanum tuberosum and that of brinjal is Solanum melongena. This indicates that both potato and brinjal are members of the:

• A. Same species but different genera
• B. Same genus but different classes
• C. Same species but different classes
• D. Same genus but different species
• E. Same class but different genera

Explanation: The scientific names you mentioned indeed place both potato (Solanum tuberosum) and brinjal (Solanum melongena) in the same genus, Solanum. Therefore, both potato and brinjal belong to the same plant genus, which is Solanum. The Solanaceae family encompasses a diverse group of plants that includes not only potatoes and brinjals but also tomatoes, peppers, and other species commonly known as nightshades.

1888. Which of the following is true in angiosperm life cycle?

• A. Gametophyte are photosynthetic and partially independent than sporophyte
• B. Sporophytes are totally dependent on gametophytes
• C. Gametophytes are totally dependent on sporophytes
• D. Both gametophytes and sporophytes are totally dependent on each other
• E. Both gametophytes and sporophytes are totally independent of each other

Explanation: The statement "Gametophytes are totally dependent on sporophytes" is generally accurate in the context of the life cycle of plants that exhibit alternation of generations. This alternation involves two distinct phases. Plant sporophytes represent the asexual phase of the cycle and produce spores. In seed-bearing vascular plants, such as angiosperms and gymnosperms, the gametophyte is totally dependent on the sporophyte for development.

1889. The scientific name of Thorn Apple is:

• A. Sycopodium phlegmaria
• B. Anthocoris fusiform
• C. Ginkgo biloba
• D. Datura stramonium
• E. Agaricus bisporus

Explanation: The correct answer is Datura stramonium. Thorn Apple, or Datura stramonium, is a plant belonging to the Solanaceae family, characterized by its spiny fruit capsules and trumpet-shaped flowers. It is known for its toxic properties due to the presence of alkaloids that can cause hallucinations. The other options are incorrect because they refer to different organisms: Sycopodium phlegmaria is a fern; Anthocoris fusiform is an insect; Ginkgo biloba is a tree; and Agaricus bisporus is a mushroom.

1890. The floral formula of family caesalpiniaceae or casia family is:

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

Explanation: Caesalpiniaceae is a botanical family of flowering plants. It was traditionally recognized as a distinct family, but in more recent classifications, many of its genera have been moved to the family Fabaceae. The floral formula of family caesalpiniaceae is ⚥ ,+, K5 or (5), C(5), A 10 ,G1 .