Tag: angiosperms

Quizzes (1) Questions (200)

Questions Related to angiosperms

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

What is true of angiosperms ?

  1. Seeds are naked

  2. They have tracheids only

  3. They are not cryptogams

  4. They lack companion cells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angiosperms are phanerogams (seed-bearing plants), not cryptogams (non-seed-bearing plants). They have enclosed seeds, possess both tracheids and vessels, and have companion cells.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Greatest extent of adaptation to various environments is found in __________.

  1. Gymnosperms

  2. Bryophytes

  3. Ferns

  4. Angiosperms.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Greatest extent of adaptation to various environments is found in angiosperms. Angiosperms grow on most of the places on earth. They grow in hot (Cactus) and cold deserts. They also grow in high altitude of Himalayas, in water (Hydrilla)  and all types of terrestrial habitat.

So, the correct answer is 'Angiosperms.'
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Phloem of angiosperms differs from that of other vascular plants in presence of ______________.

  1. Vessels

  2. Companion cells

  3. Tylosoldes

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

Companion cells are specialized parenchyma cells associated with sieve tube elements in the phloem of angiosperms. Gymnosperms use albuminous cells instead.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Floral features are chiefly used in angiosperms identification because

  1. Flowers are nice to work with

  2. Flowers have various colour

  3. Flowers can be safely pressed

  4. Reproductive parts are more stable and conservative than vegetative parts
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Floral parts are considered more evolutionarily stable and less influenced by environmental changes compared to vegetative parts (leaves, stems, roots), making them more reliable for taxonomic classification.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

A group of PUC students are appearing for a biology practical examination. One of the practical problems is to identify the slide focused under a microscope. When they observe, they see a structure more or less spherical having an outer most layer which is green in colour and in the middle many of parenchyma cells and a number of skull-shaped bundles are arranged irregularly all around. Help them in identifying the structure properly.

  1. It is the transverse section of a dicot stem.

  2. It is the transverse section of a monocot root.

  3. It is the transverse section of a dicot leaf.

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Monocots have their vascular bundles arranged in the form of a ring. They have spherical structures when seen in a microscope.  In their outermost layer, there is a presence of chloroplast containing chlorophyll. Both of them have these layers of epidermis, cortex, endodermis, pericycle, vascular tissue, conjunctive tissue, pith. In the middle layer, there are parenchyma cells. Below it, there are skull-shaped bundles of xylem and phloem arranges spherically.

So, option D is the correct answer.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Ploidy of ovum of angiosperms is

  1. Haploid

  2. Diploid

  3. Triploid

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

In Angiosperms, the female gametophyte, or megagametophyte, is the embryo sac. Eggs develop in the ovules of the angiosperm flower. Within each ovule is a megaspore mother cell. Each megaspore mother cell undergoes meiosis to produce four haploid megaspores.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Secondary growth is absent in

  1. Monocotyledons

  2. Dicotyledons

  3. All angiosperms

  4. Gymnsoperms
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
(A) secondary growth is absent in monocotyledons due to absent of cambium ring between xylem and phloem.
(B) Dicotyledons show secondary growth due to the presence of the cambium ring between xylem and phloem.
(C) Angiosperms include monocot and dicot in which monocot does not show secondary growth due to the absence of cambium ring.
(D)  secondary growth present also in gymnosperms due to the presence of the cambium ring between xylem and phloem.
So, the correct answer is 'Monocotyledons'.
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

The beginning of photosynthesis in a dicot plant is marked by the formation of

  1. Cotyledon

  2. Endosperm

  3. Embryonic root

  4. Apical meristem

  5. Lateral meristem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dicots are the flowering plants recognized by the presence of two cotyledons. Initially, in the seed, the endosperm provides nourishment. The cotyledons are the initial primary leaves formed after the germination of seed. These are the small green leaves which mark the start of the photosynthesis and the plant can synthesize food on their own. 

Thus, the correct answer is option 'Cotyledon'.