Tag: phanerogams

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Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Pick out the wrong statement.

  1. Double fertilization is unique to gymnosperms and monocotyledons

  2. Sequoia, a gymnosperm is one of the tallest trees
  3. Phaeophyceae members possess chlorophylls $a, c$, carotenoids and xanthophylls

  4. Moss is a gametophyte which consists of two stages, namely protonema stage and leafy stage

  5. Evolutionarily, pteridophytes are the first terrestrial plants to possess xylem and phloem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Double fertilization is a unique characteristic of angiosperms, not gymnosperms. Gymnosperms produce seeds but do not undergo double fertilization.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Occurrence of triploid $\left(3n\right)$ endosperm is characteristic feature of

  1. Algae

  2. Bryophyte

  3. Gymnosperms

  4. Angiosperms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Triploid endosperm is formed by the fusion of one male gamete with two polar nuclei, a process known as triple fusion, which is exclusive to angiosperms.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Which is not true about monocots?

  1. Embryo has single cotyledon

  2. Leaves show parallel venation

  3. Flowers are generally trimerous

  4. Vascular bundles are conjoint, collateral and open
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Monocots have closed vascular bundles (lacking cambium). Open vascular bundles, which allow for secondary growth, are characteristic of dicots.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Consider the following statements with respect to angiosperms.
(a) Male sex organ in a flower is the stamen
(b) Anthers following mitosis produce pollen grains
(c) In an embryo sac, the primary endosperm nucleus (PEN) is diploid
(d) After double fertilization, ovules develop into seeds and ovaries into fruits
Of the above statements

  1. (c) and (d) are correct

  2. (a) and (b) are correct

  3. (a) and (c) are correct

  4. (a) and (d) are correct

  5. (b) and (c) are correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement (a) is correct as the stamen is the male reproductive organ. Statement (d) is correct as ovules become seeds and ovaries become fruits. Statement (c) is incorrect because the PEN is triploid (3n), not diploid.