Free Biodiversity and Variety of Life MCQs with Answers
3130 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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3130 questions · page 307 of 313
3061. Club-mosses are also called
- A. Psilopsida
- B. Sphenopsida
- C. Lycopsida
- D. Pleropsida
Explanation: The correct answer is Lycopsida. Club-mosses belong to the class Lycopsida, which is a group of vascular plants that have microphylls and reproduce using spores. The other options, such as Psilopsida and Sphenopsida, refer to different classes of plants within the plant kingdom. Pleropsida is not a valid classification.
Correct answer: Lycopsida3062. In grapes and mangoes, the INFLORESCENCE is
- A. panicle
- B. multiparous cyme
- C. capitulum
- D. umbel
Explanation: A panicle is a branched inflorescence in which each branch has more than one flower. Major examples of plants having such inflorescences are grapes and mangoes. They are shown below, respectively.
Correct answer: panicle3063. A sporophyte that depends on gametophytes is:
- A. Adlantum
- B. Pinus
- C. Marchantia
- D. Mustard-plant
Explanation: Bryophytes (mosses, liverworts and hornworts) have dominant gametophyte phase on which the adult sporophyte is depended for nutrition. Marchantia is a type of bryophyte.
Correct answer: Marchantia3064. In angiosperms the megaspore develops into:
- A. Embryo-Sac
- B. Embryo
- C. Seed
- D. Male gametophyte
Explanation: The functional megaspore grows into an Embryo sac in angiosperms.
Correct answer: Embryo-Sac3065. All of the following plants posses hermaphrodite flowers except:
- A. Lathyrus odoratus
- B. Solanum nigrum
- C. Zea mays
- D. Avena sativa
Explanation: Zea-Mays (corn) are a monoecious plant, a hermaphrodite, where both the male and female reproductive parts are present in the same plant.
Correct answer: Zea mays3066. A spore of Fern plant develops into:
- A. Zygote
- B. Sporophyte
- C. Gametophyte
- D. Prothalus
Explanation: Released spores grow into a gametophyte which is a very small heart shaped structure.
Correct answer: Gametophyte3067. All of the following are gametophytes except:
- A. Club Mosses
- B. Funaria
- C. Liver-Worts
- D. Horn-Worts
Explanation: In Club mosses also called lycopsids, the gametophyte is mainly underground.
Correct answer: Club Mosses3068. All of the following are dioecious except:
- A. Ulva
- B. Funaria
- C. Marchantia
- D. Polytrichum
Explanation: Funaria (cord moss) is a bryophyte. Funaria is monoecious and autoecious i.e., male and female reproductive structures develop on different branches of the same plant.
Correct answer: Funaria3069. Dicotyledonous flowers are usually:
- A. Clmerous
- B. Trimerous
- C. Tetramerous
- D. Pentamerous
Explanation: Flowering plants are divided into two broad groups by botanists: monocots and dicots. The distinction between the two is made based on the number of cotyledons present in the seed after the plant germinates. As their names suggest, monocots have one cotyledon, while dicots have two. In pentamerous flowers, the floral parts are either arranged in five or even multiples of five. The dicotyledonous flower commonly has a pentamerous symmetry.
Correct answer: Pentamerous3070. The smallest gametophyte is present in:
- A. Adiantum
- B. Funaria
- C. Marchantia
- D. Angiosperms
Explanation: Angiosperms, also called flowering plants, are about 300,000 species of flowering plants, the largest and most diverse group within the kingdom Plantae. The smallest and least complex gametophytes are those of flowering plants.
Correct answer: Angiosperms