Tag: importance and classification of angiosperms

Questions Related to importance and classification of angiosperms

Cuticular transpiration is observed mainly 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. Xerophytes

  2. Herbaceous plants

  3. Trees

  4. Shrubs

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Correct Option: A

What reduces amount of light reaching leaf?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Sulfur oxide emission

  2. Carbon dioxide

  3. Dust and Smog

  4. Nitrogen

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Correct Option: C

Which of the following is the major adaptation for a plant to survive in the xerophytic conditions?

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

  1. Long tap root

  2. Lack of stomata

  3. Spines

  4. Stipular leaves

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Correct Option: C
Explanation:

CactI are among the most drought-resistant plants on the planet, due to their absence of leaves, shallow root systems, ability to store water in their stem, spines for shade and waxy skin to seal in moisture. Xerophytes can have smaller leaves or fewer branches than other plants. An example of leaf surface reduction are the spines of a cactus. Spines also protect the plants from animals and collect moisture too.

Some plants have a habit of harbouring ants to save the plants from damage by other animals which is known as

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

  1. Entomophily

  2. Myrmacrophily

  3. Anemophily

  4. Hydrophily

  5. Zoophily

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Correct Option: B
Explanation:

Myrmecophily is the term applied to positive interspecies associations between ants and a variety of other organisms such as plants, other arthropods, and fungi. Myrmecophily refers to mutualistic associations with ants, though in its more general use the term may also refer to commensal or even parasitic interactions. The term myrmecophile is used mainly for animals that associate with ants.

Halophytes can grow on physiological dry soil due to

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

  1. Dry soil

  2. Excessive humidity outside

  3. Excessive salts in plants

  4. Excessive salts in water

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Correct Option: C
Explanation:

Halophytes grow in physiologically dry soil. The soil is having water but the soil solution has a high concentration of salts. Thus, the water is not easily available to plants, because water flows from a region of high water potential to a region of low water potential. 

Excess salt in soil solution means the water potential of soil solution is very less. To counter the reduction in water potential in the soil solution, the halophytes maintain a highly concentrated cell sap. So, the concentration of salt is very high in these plants.
So, the correct answer is option C.

Which one is a xerophyte?

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. Lotus

  3. China Rose

  4. Casuarina

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Correct Option: A
Explanation:

Capparis decidua (family Capparidaceae) is commonly known as kair. It is 
distributed throughout the arid regions of India and other countries. Kair is a caducous plant, so in the foliage condition mainly stem and fruits are common. It is also known as Capparis aphylla.
Since the plant is xerophytic, it is generally found in dessert area and is highly draught resistant plant, which can survive for long. Tribal people prepare pickle from the fruits of kair. 

The plants in which vascular tissues are absent and well developed aerenchyma is present 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. Xerophytes

  2. Halophytes

  3. Hydrophytes

  4. Mesophytes

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Correct Option: C
Explanation:

Hydrophytes are water loving plants and grow in aquatic environments. In these plants mechanical tissue is absent. Xylem is poorly developed or absent. Hydrophytes possess special air storage parenchyma, called as aerenchyma. It makes plant parts light, spongy and flexible.

Succulent xerophytes are likely to be found 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. Tropical rain forest

  2. Deciduous forest

  3. Desert

  4. Tundra

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Correct Option: C
Explanation:

Xerophytes are the plants that has adapted to survive in an environment with little liquid water, such as a desert or an ice- or snow-covered region in the Alps and Arctic regions. Succulents plants stores water. They have mucilage to retain water. Stomata are sunken and usually open only during nights. 

Therefore, the correct answer is option C.

A plant growing on a forest floor

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

  1. Has shallow roots

  2. Requires low light

  3. Has a deep tap root

  4. Requires strong light

  5. Requires moist soil

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Correct Option: B
Explanation:

Typical plants that are found on the forest floor include a variety of ferns, mangrove trees, and vines. The canopy of trees spread their leaves to attract as much sunlight. Though the forest floor is the principal sites of decomposition, there is a stiff competition for sunlight and nutrients. The plants that occupy the forest floor are ones that require low light as they are adapted to grow under conditions of low light availability and have large dark  green leaves to absorb as much sunlight.

The features of the xerophytic plant leaves are:

(i) Leathery surface
(ii) Large surface area
(iii) Waxy cuticle
(iv) Sunken stomata on upper epidermis

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

  1. (i), (ii) and (iv)

  2. (i) and (iii)

  3. (i), (iii) and (iv)

  4. (i) and (iv)

Show answer
Correct Option: B
Explanation:

Xerophytes are plants of dry habitats, which are faced with the problem of more water loss through transpiration than is water available from soil, e.g., Acacia, Casuarina etc.
In these plants leaves or leaflets are often small, vertical, thick and leathery. Cuticle is thick and waxy. Stomata are sunken and restricted to lower surface of leaf.