Tag: phanerogams

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Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both are true but reason is not correct explanation (B), assertion true but reason is wrong (C) and both are wrong (D).
Assertion. In angiosperms, transport of food and water is more efficient than gymnosperms and pteridophytes
Reason. In angiosperms, longitudinally arranged sieve elements and vessels with perforated end walls are present

  1. A

  2. B

  3. C

  4. D
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Gymnosperms and pteridophytes lack the two vascular structures i.e., vessels and sieve elements. In angiosperms presence of vessels and sieve elements in addition to all other vascular tissues make their food and water transport more efficient.
So, the correct answer is 'A.'
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

How do gymnosperms and angioperms differ from each other?

  1. Gymnosperms have naked seed but angiosperms have seed coat

  2. Gymnosperm have leaves but angiosperms do not have leaves

  3. Gymnosperms are seed bearing plant but seed is absent in angiosperm

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary and have a seed coat (usually a fruit), while in gymnosperms flowers or fruits are absent and the seeds are naked. So, they are also called naked seeds. These seeds are present on the surface of scales or leaves.
So, the correct answer is 'Gymnosperms have naked seed but angiosperms have seed coat'.
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Angiosperms have all except

  1. Sieve cells

  2. Tracheids

  3. Sieve tubes

  4. Vessels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Sieve cells are present in gymnosperms and pteridophytes and absent in angiosperms.
B. Tracheids are present in angiosperms, gymnosperms and pteridophytes.
C. Sieve tubes are present in angiosperms and absent in gymnosperms and pteridophytes.
D. Vessels are present in angiosperms and absent in gymnosperms and pteridophytes.
So, the correct option is 'Sieve cells'.
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Double fertilisation and triple fusion events are unique to

  1. $Algae$
  2. $Angiosperms $
  3. $Gymnosperms$
  4. $Pteridophytes$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Triple fusion is the fertilization of the two polar nuclei in the embryo sac. It occurs during the double fertilization of angiosperms. While one sperm cell fertilizes the egg cell in the embryo sac, the other sperm cell fertilizes the two polar nuclei found in the central cell. So the correct option is 'Angiosperm'.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Consider the following statements regarding angiosperms and choose that how many statements are correct?
(i) In phanerogams, gametophytes have no independent existence
(ii) Nectar robbers bring about pollination in some flowing plants
(iii) Hypogeal germination is found in castor, pea and groundnut
(iv) Secondary nucleus is diploid and dikaryotic nucleus.

  1. Four

  2. One

  3. Two

  4. Three
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All four statements are correct: (i) gametophytes in phanerogams are dependent, (ii) nectar robbers can facilitate pollination, (iii) hypogeal germination is characteristic of these plants, and (iv) the secondary nucleus is indeed diploid and dikaryotic.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Double fertilization is present in

  1. Angiosperms

  2. Bryophytes

  3. Gymnosperms

  4. Pteridophytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Double fertilisation is present in Angiosperms. One male gamete takes part in fertilisation and fuses with the egg, while the other one fuses with secondary nucleus of embryo sac.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

The sieve tubes and companion cells are exceptional feature of

  1. Gymnosperms

  2. Angiosperms

  3. Ferns

  4. Pteridophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Companion cells are present only in angiosperms. Companion cells are absent in pteridophytes and gymnosperms. Sieve cells occur in pteridophytes and gymnosperms, while sieve tubes occur in angiosperms.
So, the correct answer is 'Angiosperms'
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Tallest Angiosperm is

  1. Quercus

  2. Eucalyptus

  3. Phoenix

  4. Sequoia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tallest tree ever measured was not a Sequoia sempervirens, but a type of eucalypt (Eucalyptus). Eucalyptus tree is the tallest in the world, the tallest hardwood tree in the world, and the tallest flowering plant in the world.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

In angiosperms, the functional megaspore develops into

  1. Endosperm

  2. Pollen tube, male gametrophyte

  3. Embryo sac, female gametophyte

  4. Ovule
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In angiosperms, the functional megaspore undergoes mitosis to develop into the embryo sac, which serves as the female gametophyte.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

The species that flower are called

  1. gymnosperms

  2. bryophytes

  3. angiosperms

  4. algae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angiosperms are flowering plants, characterized by the production of seeds enclosed within an ovary. Gymnosperms produce naked seeds, while bryophytes and algae do not produce seeds or flowers.