Tag: phanerogams

Questions Related to phanerogams

Read the following statements.
(a) Angiosperms range in size from microscopic Wolffia to tall trees of Eucalyptus
(b) In angiosperms, the seeds are enclosed by fruits
(c) Double fertilization is an event unique to angiosperms
(d) In angiosperms, each cell of embryo sac is diploid
(e) In angiosperms, the zygote develops into an endosperm
Of the above statements, the correct ones are

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. $a, b$ and $d$

  2. $a, b$ and $e$

  3. $a, b$ and $c$

  4. $b, c$ and $d$

  5. $b, c$ and $e$

Show answer
Correct Option: C

The most diverse group of plants on earth are

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Bryophytes

  2. Ferns

  3. Gymnosperms

  4. Angiosperms

Show answer
Correct Option: D

In grasses, the ligule occurs

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. At leaf base

  2. Between leaf base and lamina

  3. Between leaf base and petiole

  4. Between petiole and lamina

Show answer
Correct Option: A
Explanation:

 A ligule is an outgrowth present at the junction of leaf sheath and lamina in grasses. It occurs at the end of petiole at the leaf base. It is a strap-shaped extension of the corolla. It is a membranous appendages.

Thus, the correct answer is 'At leaf base.'

Seed leaf is

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Leaf present over the plumule

  2. Colyedon

  3. Coleoptile

  4. Mesocotyl

Show answer
Correct Option: B
Explanation:

The seed coat encloses an embryo wich is differentiated into radicle (give rise to primary root), plumule(give rise to aerial shoot) and cotyledons (seed leaves). The number of cotyledons may be one or two. These are different from foliage leaves. Some times they store reserve food materials or serve as photosynthetic organs in young seedling. The plumule is surrounded by a conical protective sheath, called coleoptile.

So, the correct answer is 'Cotyledon'.

In monocots

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Leaves have reticulate venation

  2. Stems have annual rings

  3. Seed have two storage organs

  4. Stems have scattered conducting strands

Show answer
Correct Option: D
Explanation:

A. Leaves have reticulate venation – dicotyledons

B. Stems have annual rings – dictyledons

C. Seed have two storage organs -dicotyledons

D. Stems have scattered conducting strands – monocotyledons

So, the correct option is ‘stems have scattered conducting strands’.    

A monocot showing reticulate venation is

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Bombusa

  2. Smilax

  3. Callophyllum

  4. Ginkgo

Show answer
Correct Option: B
Explanation:

Smilax is an economically important monocotyledonous flowering plant belonging to family Liliaceae. It is found in tropics and subtropics worldwide. They are climbing flowering plants, many of which are woody and thorny. Usually, monocots show parallel venation (veins present in the leaf are arranged parallel to each other), but Smilax shows reticulate venation (veins are interconnected and forms web-like structure). So, the correct answer is 'Smilax'.

Tigellum is

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Embryonic axis

  2. Embryonic root

  3. Embryonic shoot

  4. Embryonic leaf

Show answer
Correct Option: A
Explanation:

The cotyledons are attached to the curved embryonal axis (Tigellum) at the cotyledonary node. The ,micropylar end of embryonal axis is rod- shaped and slightly bulged. It is called radicle (or embryonic root). The other side of embryonal axis lies in between the two cotyledons. It is called plumule( or the shoot tip).

So, the correct answer is 'Embryonic axis'.

Oil yielding plants are abundant in the family

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Solanaceae

  2. Ranunculaceae

  3. Cruciferae

  4. Curcurbitaceae

Show answer
Correct Option: C
Explanation:

Most of the oil yielding plants belong to the family Cruciferae.

Seeds of these plants bear a high amount of oil which is important for an economical perspective. 
So the correct option is C.

Embryo sac of angiosperms contains.

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. $3$- celled egg apparatus, $3$ antipodal cells and $2$ polar nuclei

  2. $2$- celled egg apparatus, $3$ antipodal cells and $2$ polar nuclei

  3. $3$- celled egg apparatus, $2$ antipodal cells and $1$ polar nucleus

  4. $3$- celled egg apparatus, $1$ antipodal cell and $2$ polar nuclei

Show answer
Correct Option: A

Occurrence of triploid primary endosperm nucleus is characteristic of.

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Algae

  2. Bryophytes

  3. Gymnosperms

  4. Angiosperms

Show answer
Correct Option: D