Tag: flowers and fruits

Questions Related to flowers and fruits

Gymnosperm wood is non-porous because it

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Lacks vessels

  2. Contains tracheae

  3. Has abundant fibres

  4. Contains no fibres

Show answer
Correct Option: A
Explanation:

The secondary xylem or wood of gymnosperms, vessels are absent. So it is called non porous wood.

So, the correct option is ‘lacks vessels’.

A spermatophyte with ciliated stage is 

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Gymnosperm

  2. Riccia

  3. Angiosperm

  4. Pteridium

Show answer
Correct Option: A

Both pteridophytes and gymnosperms possess 

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Ovules

  2. Seeds

  3. Archegonia

  4. Independent gametophyte

Show answer
Correct Option: C

Male and female gametophytes do not have free independent existence in 

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Pteris

  2. Cedrus

  3. Polytrichum

  4. Funaria

Show answer
Correct Option: B
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.

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

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Bryophytes

  2. Pteridophytes

  3. Gymnosperms

  4. Dicotyledonous plants

Show answer
Correct Option: C
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.

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

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  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

Show answer
Correct Option: A
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'.

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

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. they are seedless

  2. they are not pollinated

  3. the process of fertilization does not occur

  4. they have no ovary

Show answer
Correct Option: D
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'.