Tag: botany

Questions Related to botany

Large stout, nocturnal flowers producing copious nectar and emitting fermenting fruity odor, are the adaptations for.

botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

  1. Entomophily

  2. Ornithophily

  3. Chiropterophily

  4. Anemophily

Show answer
Correct Option: C
Explanation:
Pollination occurs through bats is called chiropterophily and flower is called a chiropterophilous flower. Adaptations in chiropterophilous flower :
1. Flowers open during evening or night. 
2. Flowers are large, dull colored and have a strong scent like that of rotting fruits. 
3. Flowers produce abundant pollen grains. 
4. Flowers produce copious nectar.
5. Flowers are tough so that bats can hold on the flowers.
So the correct option is "Chiropterophily".

Which one is absent in windy areas

botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

  1. Birds

  2. Anemophilous plants

  3. Zoophilous plants

  4. Insects

Show answer
Correct Option: C
Explanation:

Windy areas are favorable for plants in which pollination is done by the wind like corn, willow etc while it is unfavorable for those in which pollination is done by animals as it is very difficult to survive.

So the correct option is 'Zoophilous plants'.

Pollination by bats is called as

botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

  1. Chiropterophily

  2. Omithophily

  3. Malacophily

  4. Entomophily

Show answer
Correct Option: A
Explanation:
Pollination by bats is called as Chiropterophily. Flowers that are pollinated by this mechanism usually are usually pale and nocturnal. The advantage of pollination by bats is that they do long distance dispersal of pollen along with depositing huge amount of pollen on the stigmas.
So, the correct answer is, 'Chiropterophily'.

Animals assist with

botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

  1. Pollination and seed dispersal

  2. Control of plant growth and response

  3. Translocation of organic nutrients

  4. Asexual propagation of plants

Show answer
Correct Option: A
Explanation:

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part in the flower, known as the stigma. Zoophily is a form of pollination whereby pollen is transferred by animals. Zoophilous species frequently evolve mechanisms to make themselves more appealing to the particular type of pollinator. Seed dispersal is the movement or transport of seeds away from the parent plant. Plant species transported externally by animals can have a variety of adaptations for dispersal, including adhesive mucus, and a variety of hooks, spines and barbs

So, the correct answer is 'pollination and seed dispersal'

Myrmecophily is characterised by 

botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

  1. Plants harbouring ants

  2. Plants storing food underground

  3. Plants imitating the habit of animals

  4. Plants with small leaves

Show answer
Correct Option: A
Explanation:

Myrmecophily is the symbiotic relationship between plant and ants in which plants provide food to plant or place to hide eggs and ants help them in pollination. 

So the correct option is 'Plants harbouring ants'

In sclerenchyma, wall is

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Lignified

  2. Suberised

  3. Pectinised

  4. Cutinised

Show answer
Correct Option: A
Explanation:

Sclerenchyma cells are characterized by relatively thick, lignified secondary cell walls. The lignified wall gives sclerenchyma cells their rigidity, and they function primarily in mechanical support and water conduction. They also make up most rigid parts of the plant (e.g., seed coats and some fruit walls) and are often positioned so that they provide mechanical protection for softer plant parts. 

So, the correct answer is 'Lignified.'

Common between sclerenchyma and collenchyma is

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Material transport

  2. Conduction of water and minerals

  3. Providing buoyancy

  4. Providing support

Show answer
Correct Option: D
Explanation:
Plants are composed of a variety of different cells, two of which are sclerenchyma and collenchyma. The similarity of both cells is that both of them function for support. These cells are two of the three classes of ground tissue together with Parenchyma cells. Collenchyma cells are responsible for giving support to extra structural regions and Sclerenchyma cells are the main structural support for plants. 
So, the correct answer is 'Providing support.'

Which of the following is not related to the structure of stomata?

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Epidermal cells

  2. Guard cells

  3. Sclerenchyma cells

  4. Accessory cells

Show answer
Correct Option: C
Explanation:

Sclerenchyma is the supporting tissue in plants. Two types of sclerenchyma cells exist: fibers and sclereids. Their cell walls consist of cellulose, hemicellulose and lignin. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation where as Stomata are cell structures in the epidermis of tree leaves and needles that are involved in the exchange of carbon dioxide and water between plants and the atmosphere.

So, the correct answer is 'Sclerenchyma cells.'

Which is not true regarding sclerides?

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Found in shells of nuts, pulp of Guava and Pea

  2. Stone cells

  3. Constituent of sclerenchyma

  4. Group of living cells

Show answer
Correct Option: D
Explanation:
Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. The presence of numerous sclereids form the cores of apples and produce the gritty texture of guavas. 
So, the correct answer is 'Group of living cells.'

Compare the statements a and b
Statement a. Sclerenchyma cells do not have plasmodesmata
Statement b. Cell walls of some permanent tissues are heavily lignified.

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Statement a is correct and b is wrong

  2. Both the statements a and b are wrong

  3. Both the statements a and b are correct

  4. Statement a is wrong and b is correct

Show answer
Correct Option: C
Explanation:

Plasmodesmata are narrow channels that act as intercellular cytoplasmic bridges to facilitate communication and transport of materials between plant cells and are not found in Sclerenchyma cells. Sclerenchyma fibres are long and narrow and have thick lignified cell walls. They provide mechanical strength to the plant and allow for the conduction of water. Sclereids are specialised sclerenchyma cells with thickened, highly lignified walls with pits running through the walls.

So, the correct answer is 'Both the statements a and b are correct.'