Tag: importance and classification of angiosperms

Questions Related to importance and classification of angiosperms

Plants adapted to grow in shade are

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Psammophytes

  2. Sciophytes

  3. Mesophytes

  4. Xerophytes

Show answer
Correct Option: B
Explanation:

Plants growing in bright light are called as sun plants or heliophytes, while plants growing in partial shade or low light intensity are called as shade plants or sciophytes. 

In sciophytes the stems are soft, slender with large internodes. Leaves are thin and large sized. The have bright green colour. Leaf cells are large. Cuticle is thin. Stomata are in level with surface. Palisade parenchyma is less developed. There is more vegetative growth as compared to flowering and fruiting
So, the correct answer is 'Sciophytes'

A succulent xerophyte is

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Capparis

  2. Calotropis

  3. Agave

  4. None of the above

Show answer
Correct Option: C
Explanation:

In succulent xerophyte, plants have fleshy organs, where water and mucilage are stored. Depending upon the organ, where succulence occurs, the succulents show chylocauly, i.e., fleshy stem, e.g., Opuntia, Euphorbia, Asparagus; chylophylly ie fleshy leaves, e.g., Agave, Aloe or chylorhizy, i.e., fleshy roots, e.g., Asparagus.

Mechanical tissue is best developed in

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Hydrophytes

  2. Halophytes

  3. Xerophytes

  4. Mesophytes

Show answer
Correct Option: C
Explanation:

Plants living in dry conditions are called as xerophytes. These plants show many morphological and structural adaptations to survive in dry conditions. In stem the mechanical tissue is well developed and also bark is well developed to retain water

The mechanical tissue is least developed in hydrophytes to avoid resistance to water current
So, the correct answer is 'Xerophytes'

Myrmecophily is an association between higher plant and.

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Bacteria

  2. Fungi

  3. Blue-green algae

  4. Ants

Show answer
Correct Option: D

The vegetation of Rajasthan is

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Arctic

  2. Alpine

  3. Deciduous

  4. Xerophytic

Show answer
Correct Option: D
Explanation:

Xerophytes are plants of dry habitats, where the environment favours higher rate of transpiration than the rate of absorption. 

In India various parts of Rajasthan and Gujarat show xerophytic plants. Jaisalmer district and surrounding areas of Rajasthan are true deserts.

Which one is not a trait of xerophytes?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Thick cuticle

  2. Sunken stomata

  3. Aerenchyma

  4. Well developed mechanical tissue

Show answer
Correct Option: C
Explanation:

Hydrophytes possess special air storage parenchyma tissue, called as aerenchyma. It makes different parts of hydrophytes, light, spongy and flexible. It makes oxygen produced during photosynthesis, available to roots and other non photosynthetic regions. It can also help in exchange of gases with the atmosphere through stomata present in emerged regions of plants. Xerophytes show structural adaptations to discourage water loss through transpiration and increase water absorption. Such adaptations include thick cuticle, sunken stomata, well developed vascular tissue etc.

The waxy surface of floating leaves of the hydrophytes prevents

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Respiration

  2. Photosynthesis

  3. Transpiration

  4. Clogging of stomata

Show answer
Correct Option: D
Explanation:

Hydrophytes are water loving plants. The hydrophytes with floating leaves have large leaves, stomata and waxy coating on the upper surface. The waxy coating prevent wetting and clogging of stomata.

Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs


botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Prosopis, tree, scrub

  2. Saccharum, grass, forest

  3. Shorea robusta, herb, tropical rain forest

  4. Acacia catechu, tree, coniferous forest

Show answer
Correct Option: A

Plants like Rhizophora and Avicennia grow on the sea shores under saline conditions. For this they have special roots for respiration which are called

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Floating roots

  2. Pneumatophores

  3. Climbing roots

  4. Prop roots

Show answer
Correct Option: B
Explanation:

Pneumatophores are specialized root structures that grow out from the water surface and facilitate the aeration necessary for root respiration in hydrophytic trees such as many mangrove species (e.g., Avicennia germinans and Laguncularia raecemosa), bald cypresses, and cotton (Tupelo) gum (Nyssa aquatica). So, the correct option is "B" (Pneumatophores).

Choose the feature not associated with organism found in tropical deserts

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Small body size

  2. Large surface area relative to their volume

  3. Large body extremities

  4. Small surface area relative to their volume

Show answer
Correct Option: A
Explanation:

Tropical desert areas are those where there is scarcity of water and extensive heat. Organisms in those areas adapt to survive in that ecological condition. Adaptations like thorns and succulents in flora helps the plants to survive without plenty of water. The leaves and stems undergo modification to conduct photosynthesis in less available water. Animals like frogs, rabbits, snakes, camels, etc. also go through modification in their characteristics to ensure their survival. Large surface of an any organism can lead to radiation of more body heat per unit of mass which can be fatal. Hence, such adaptations is not seen in organisms present in tropical desert.

So the correct option is 'large surface area relative to their volume'