Free Kingdom Plantae MCQs with Answers

371. The gymnosperms are called 'Naked Seeded' plants because they bear naked:

• A. Antheridia
• B. Ovules
• C. Fruits
• D. Archegonia

Explanation: Explanation:The term gymnosperm literally means naked seeds. The ovules in these plants are usually borne on exposed surfaces of fertile leaves. These ovules unlike those of angiosperms are not enclosed but lie naked on the surface of fertile leaves. Antheridia are structures in plants that produce and contain male gametes (sperm). They are not directly related to the term "naked seeded" used to describe gymnosperms. Gymnosperms donot produce fruits, which are the defining characteristic of angiosperms. Archegonia are structures in plants that produce and contain female gametes (eggs). They are not directly related to the term "naked seeded" used to describe gymnosperms.

372. The integumented indehiscent megasporangium is called:

• A. Seed
• B. Archegonium
• C. Megagametophyte
• D. Ovule

Explanation: Explanation: The integumented indehiscent megasporium is called ovule. The integumented indehiscent megasporium is called ovule, not seed. Archegonia are structures in plants that produce and contain female gametes (eggs). They are found in bryophytes and some ferns, but not in seed plants. This option is also incorrect. The integumented indehiscent megasporium is called ovule, not megagametophyte.

373. Pulses are present in the family:

• A. Caesalpiniaceae
• B. Fabaceae
• C. Gramineae
• D. Mimosaceae

Explanation: Explanation:This option is correct because family Fabaceae also known as family leguminosea contains legumes and pulses. The pulses belong to the family Fabaceae or leguminosea. The members of this family include sweet pea, pea, legumes, etc. These are leguminous plants. This means that most of them have nodules in their roots that enclose symbiotic bacteria.The family Caesalpiniaceae is another family of flowering plants, but it is not known for producing pulses. The family Gramineae, also known as Poaceae, includes grasses and cereal crops such as wheat, rice, and corn. While these crops are important sources of food, they are not considered pulses.The family Mimosaseae includes many species of trees and shrubs, but it is not known for producing pulses.

374. Endosperm is formed as a result of:

• A. Pollination
• B. Self-Pollination
• C. Double Fertilisation
• D. Cross Pollination

Explanation: [A] Pollination is the transfer of pollen grains from male anther of a flower to the female stigma[B] Pollen is transferred from any flower of the same plant.[C] Double fertilisation involves two sperm cells; one fertilizes the egg cell to form the zygote, while the other fuses with the two polar nuclei that form the endosperm.[D] Cross Pollination, transfer of pollen comes from a flower on a different plant

375. Consider the following names of some plants.

• A. Grapes
• B. Mango
• C. Oats
• D. Willow

Explanation: In inflorescence: Indeterminate inflorescence. A panicle is a branched raceme in which each branch has more than one flower, as in the astilbe (Astilbe). In angiosperm: Inflorescences. A panicle is a branched raceme in which the branches are themselves racemes (e.g.. yuccas)

376. Which one of the following is a marine alga?

• A. Nostoc
• B. Volvox
• C. Spirogyra
• D. Ulva

Explanation: Ulva: This is a small genus of marine and brackish water green algae. It is edible and is often called 'Sea Lettuce'.

377. All of the following are angiosperms except:

• A. Cactus
• B. Amaryllis
• C. Spurge
• D. Firs

Explanation: Answer; A (It should be D instead. Although for A both angiosperm and gymnosperm is coming on different websites, since D is certainly gymnosperm answer should be it.)

378. The flower of family gramineae (poaceae contains two scales below-ovary, which are called:

• A. glumes
• B. lemma & palea
• C. lodicules
• D. rochilla

Explanation: In the family Gramineae (Poaceae), the flower structure includes unique components like lodicules, which are small scales located below the ovary. These structures help facilitate the opening of the flower for fertilization. The other options, such as glumes, lemma, and palea, are different types of protective bracts associated with the spikelet but do not serve the same function as lodicules. 'Rochilla' is not a relevant term in this context, making it an invalid option.

379. Alternation of generations in plants is regarded a mechanism for:

• A. Achieving haploidy
• B. Promoting survival
• C. Producing diploidy
• D. Having no significance

Explanation: The concept of alternation of generations in plants involves a life cycle that alternates between a diploid sporophyte stage and a haploid gametophyte stage. This cycle allows plants to utilize both sexual and asexual reproduction, which is crucial for adapting to diverse environmental conditions. Sexual reproduction introduces genetic variation, while asexual reproduction enables rapid colonization. This adaptability is essential for plant survival, especially since plants are immobile and must cope with changing environments. Thus, the primary purpose of this cycle is to promote survival. Options A and C refer to haploidy and diploidy, which are components of the cycle but not its main goal. Option D is incorrect as alternation of generations is indeed significant for plant survival.

380. Which one among the following is in fact a fruit, but is available in a vegetable shop?

• A. Capsicum annuum
• B. Solanum tuberosum
• C. Medicago denticulata
• D. Bauhinia variegata

Explanation: The correct answer is Capsicum annuum. It is classified as a fruit because it develops from the ovary of a flower and contains seeds. Despite this, it is commonly sold in vegetable shops due to its culinary uses. On the other hand, Solanum tuberosum is a potato, a root vegetable. Medicago denticulata is a type of plant used as fodder, and Bauhinia variegata is a flowering tree, neither of which are typically found in a vegetable shop or classified as fruits.