Tag: flowers and fruits

Questions Related to flowers and fruits

Vessels and companion cells are the characteristic features of.

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Gymnosperms

  2. Angiosperms

  3. Pteriodophytes

  4. Fungi

Show answer
Correct Option: A

The water conducting tissue generally present in gymnosperm is____________.

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Vessels

  2. Sieve tube

  3. Tracheids

  4. Xylem fibres

Show answer
Correct Option: C
Explanation:

Gymnosperms do not have vessels in their xylem. Water conducting tissues present in them are tracheids.

How many generations are present in the seed of gymnosperms?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. $2$

  2. $3$

  3. $1$

  4. $4$

Show answer
Correct Option: B
Explanation:

Unlike bryophytes and pteridophytes, in gymnosperm, the male and female gametophytes don't have an independent free-living existence. They remain attached to the sporophytes. After fertilization, these developed into an embryo and the ovule into seeds. Seeds are not covered. So 3 generation live inside one seed of gymnosperm- the embryo and the female gametophytic tissue and the seed coat and the nucellus which is the female sporophytic tissue.

So, the correct option is '3'

Choose the correct answers from the alternatives given.
Ovules are not found enclosed within ovary in

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. gymnosperms

  2. spermatophytes

  3. dicotyledons

  4. monocotyledons

Show answer
Correct Option: A
Explanation:

Gymnosperms are seed-bearing vascular plants like cycads, conifers, yews and ginkgo in which the ovules are not enclosed in an ovary. So, the ovules are called naked. 

Hence, the correct answer is 'gymnosperms'.

Choose the correct answers from the alternatives given.
Which one of the following characteristics can be used to distinguish gymnosperms from angiosperms?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Presence of pollen chamber in gymnosperms

  2. Presence of naked ovules in gymnosperms

  3. Presence of stomata in angiosperms

  4. Absence of naked ovules in gymnosperms

Show answer
Correct Option: B
Explanation:

Gymnosperms are the plants in which the ovules are not covered by an ovary, and the plant does not bear flowers. The seeds are naked.

So, the correct option is 'Presence of naked ovules in gymnosperms'

Which of the following is correct?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. ln Pinus pollen grain are developed inside the megasporangia

  2. Coralloid roots are associated with Frankia

  3. Male and female cones are borne on the same tree in Pinus

  4. In Cycas the pinnate leaves persist for upto only few days

Show answer
Correct Option: C
Explanation:
A cone is a structure present on conifers that contain the reproductive organs. The male and female cones are borne on the same tree in Pinus.

So, the correct answer is 'Male and female cones are borne on the same tree in pinus'.

Which of the following is the best evidence that gymnosperms have descended from pteridophytes?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Some gymnosperms have ciliated sperms

  2. They have cones

  3. They have evergreen

  4. Some gymnosperms cannot bear fruit

Show answer
Correct Option: A
Explanation:

Gymnosperms and angiosperms, sperm cells have no cilia. All other motile land plant sperm cells are released into the environment.

So, the correct option is 'Some gymnosperms have ciliated sperms'.


A female gymnospermic plant has the genotype TT which pollinates another gymnosperms with the genotype tt. As a result of fertilization what will be the genotype of embryo and endosperm respectively?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. Tt, T

  2. Tt, TTt

  3. tt, Tt

  4. TTt, Tt

Show answer
Correct Option: B
Explanation:
  • The endosperm is the storage tissue in the seeds of gymnosperms.
  • The genotype obtained in the $F _1$ generation will be Tt, when a homozygous gymnospermic plant (TT) is crossed with another (tt).
  • Thus, the embryo being diploid in nature will have the genotype Tt.
  • Whereas, the genotype of the endosperm will be TTt because it is triploid in nature. 

What is the number of neck canal cells in the archegonium of Gnetales?

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. 0

  2. 4

  3. 8

  4. 16

Show answer
Correct Option: A
Explanation:

There are no archegonia in Gnetales. Hence, there will be no neck canal cells.

The total number of species belonging to present day gymnosperms is about

evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

  1. 2000

  2. 850

  3. 2500

  4. 4000

Show answer
Correct Option: B
Explanation:

The total number of living gymnosperms of the world is about 850 species, belonging to 79 genera of 15 families. Although the number of species of gymnosperms accounts for only 0.36% of that of the angiosperms, they have formed large areas of various kinds of coniferous forests and are widely distributed all over the world, especially on mountains from middle to alpine latitudinal zones in cold-temperate and subtropical latitudes of the Northern hemisphere.

Therefore, the correct answer is option B.