Tag: botany

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Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Match Column - I with Column - II and select the correct option from the codes given below.

Column - I  Column - II
A. Thallophyta 1. Marsilea
B. Bryophyta 2. Pinus
C. Pteridophyta 3. Ulothrix
D. Gymnospermae 4. Ficus
E. Angiospermae 5. Funaria

  1. A- 3, B- 5, C- 1, D- 4, E- 2

  2. A- 3, B- 5, C- 1, D- 2, E- 4

  3. A- 3, B- 5, C- 2, D- 1, E- 4

  4. A- 5, B- 3, C- 1, D- 2, E- 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ulothrix is a genus of filamentous green algae, generally found in fresh and marine water. They are eukaryotic and unicellular. The plant body consists of unbranched, uniseriate filaments. The Ulothrix is a thallophyte having undifferentiated bodies. Funaria are nonvascular plants, i.e., they do not have conductive tissues and they perform transport of water and nutrients by diffusion; they are cryptogamic, they are small in size; in their life cycle the lasting form is haploid (the gametophyte) and the sporophyte depends on the gametophyte to survive. Hence it is a bryophyte. The living species of heterosporous pteridophytes are small herbaceous perennials like Marsilea. These pteridophytes possess only one kind of non-sexual reproductive spores and possess the true fibro-vascular system, true roots, and leaves. The genus Pinus can be distinguished by long needles on very short shoots in bundles of 2,3, or 5, strobili on long shoots, and the shoots and foliage are strongly dimorphic. Male and female flowers are separate structures: the female flowers are the structures that will eventually become the familiar cones containing the seeds, and male flowers release pollen, which is then captured by the female cones. Gymnosperm seeds develop either on the surface of scales or leave, often modified to form cones. Thus pinus is a gymnosperm. Ficus is an angiosperm because they are seed-producing plants and have flowers, endosperm within the seeds, and the production of fruits that contain the seeds.

Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Find out and select the incorrect pair from the following.

  1. Phanerogamae- Gymnosperms and angiosperms

  2. Angiosperms- Monocotyledonous and dicotyledonous

  3. Cryptogamae- Bryophyta and Pteridophyta

  4. Pteridophytes- Horsetails and mosses
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mosses are small flowerless plants that usually grow in dense green clumps or mats, in damp or shady locations. They are bryophytes in the nature.

The horsetails are a class in the Pteridophyta (ferns). They were one of the most important plant groups in the Palaeozoic era.
Therefore, the correct answer is option D.

Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

.............. are the reproductive organs of flowering plants.

  1. Seeds

  2. Flowers

  3. Fruits

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Angiosperms are flowering plants. They reproduce by the formation of gametes and flowers act as reproductive organs. 
  • Parts of the flower include petals, sepals, one or more carpels (the female reproductive structure) and stamens (the male reproductive structure)
  • So, the correct answer is 'Flowers'
Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Which of the following is an example of dicotyledon seed?

  1. Maize

  2. Mustard

  3. Banana

  4. Garlic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The flowering plants (angiosperms) are divided into two groups, namely monocots and dicots. 
  • Monocots- Plants which have only one cotyledon in the seeds are called as monocots. For example, maize, banana, garlic, etc.
  • Dicots- Plants that have two cotyledons in their seeds are called as dicots. For example, mustard, beans, legumes, apples, etc.
Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Cotyledons are also called as______________

  1. Seed fruit

  2. Seed stem

  3. Seed leaves

  4. Seed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Cotyledons are actually part of the seed. 
  • They are the first part of the plant to emerge and they look like little green leaves (hence, "seed leaves"). 
  • The cotyledons store food reserves for the growing seedling. The plant relies on this stored food for early growth. 
  • The cotyledons also can photosynthesize, which supplies extra energy until the first true leaves emerge.
Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Which among the following is the correct definition of monocots?

  1. Plants having single cotyledons in the seed

  2. Plants having two cotyledons in the seed

  3. Plants having three cotyledons in the seed

  4. Plant without seeds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The angiosperms are divided into two groups on the basis of the number of cotyledons present in the seed. 
  • The plants with seeds having single cotyledons are known as monocots. The plants with seeds having two cotyledons are known as dicots.
Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Angiosperms have____________

  1. Naked seeds

  2. Enclosed seeds

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Subkingdom phanerogams include two divisions, gymnosperms and angiosperms.
Gymnosperms have naked seed whereas angiosperms have seeds enclosed within a fruit. 
Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

In a typical leaf palisade parenchyma is present

  1. On the abaxial side

  2. On the adaxial side

  3. In the middle of the leaf

  4. In the petiole of the leaf
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Palisade parenchyma cells are plant cells found within the mesophyll in leaves, right below the upper epidermis and cuticle. They are vertically elongated, a different shape from spongy mesophyll cells beneath them in the leaf. Their chloroplasts absorb a major portion of the light energy used by the leaf. 

Palisade cells occur in dicotyledonous plants and also in the net-veined monocots. Pallisade cells are present on the adaxial side that is the upper side of leaf.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

The types of parenchyma cells present in dicot leaf are

  1. Palisade

  2. Spongy

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Palisade cells are plant cells found within the mesophyll in leaves, right below the upper epidermis and cuticle. They are vertically elongated, a different shape from spongy mesophyll cells beneath them in the leaf. Their chloroplasts absorb a major portion of the light energy used by the leaf. Palisade cells occur in dicotyledonous plants and also in the net-veined monocots. The spongy mesophyll are usually ball-shaped with large intercellular spaces but usually contains fewer chloroplasts than the palisade cells. They are also present in dicot leaf. 

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

In floating leaved plants stomata occur on

  1. Lower surface

  2. Upper surface

  3. Both surfaces

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

Stomata is a pore, found in the epidermis of leaves, used to control gas exchange. The pore is bordered by a pair of specialized parenchyma cells, known as guard cells that are responsible for regulating the size of the opening. Stomata are present in the sporophyte generation of all land plant groups except liverworts. 

Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. 
In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely.