Tag: flowers and fruits

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Questions Related to flowers and fruits

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Male and female gametophytes do not have free independent existence in 

  1. Pteris

  2. Cedrus

  3. Polytrichum

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

Cedrus is a gymnosperm. In gymnosperms, male and female gametophytes do not have free independent existence. They remain within the sporangia retained on the sporophytes. 

Thus, the correct answer is option B.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Choose the correct answers from the alternatives given.
In which one of the following groups would you place a plant which produces seeds but lacks fruits

  1. Bryophytes

  2. Pteridophytes

  3. Gymnosperms

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

The gymnosperms are the plants in which the ovules are not enclosed by an ovary wall and remain exposed, both before and after fertilization. This is that developers fertilization are not covered that is they are naked.


So, the correct option is gymnosperm.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Choose the correct answers from the alternatives given.
Gymnosperms generally lack

  1. xylem vessels and companion cells in phloem

  2. xylem tracheids and sieve tubes in phloem

  3. xylem vessels and sieve tubes in phloem

  4. xylem tracheids and companion cells in phloem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gymnosperm generally lacks xylem vessels and companion cells in phloem as it grows in a cold and dry climate and they didn't evolve to have vessels and vessels are considered as advanced elements of xylem. And companion cells in phloem assist active transport of minerals which is absent in Gymnosperm.

So, the correct answer is 'xylem vessels and companion cells in phloem'.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Choose the correct answers from the alternatives given.
Fruits are not formed in gymnosperms because:

  1. they are seedless

  2. they are not pollinated

  3. the process of fertilization does not occur

  4. they have no ovary
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms have no ovary, they can never produce fruit.  

Seeds develop from the ovules which are found in the developed ovaries or fruit, but in the case of gymnosperms, the ovules are located directly on the surface of the flower or cone.  Yews and ginkgoes develop fruit-like structures, but their seed is not inside these organs, which makes them gymnosperms.
So the correct answer is 'They have no ovary'.