Tag: importance and classification of angiosperms

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

Cuticular transpiration is observed mainly in?

  1. Xerophytes

  2. Herbaceous plants

  3. Trees

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

Xerophytes are plants adapted to dry environments. They often have a thick waxy cuticle to prevent water loss, and cuticular transpiration becomes a significant pathway for water loss in these conditions.

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

What reduces amount of light reaching leaf?

  1. Sulfur oxide emission

  2. Carbon dioxide

  3. Dust and Smog

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dust and smog particles suspended in the air scatter and absorb sunlight, thereby reducing the intensity and quality of light that reaches the leaf surface for photosynthesis.

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

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

  1. Long tap root

  2. Lack of stomata

  3. Spines

  4. Stipular leaves
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Entomophily

  2. Myrmacrophily

  3. Anemophily

  4. Hydrophily

  5. Zoophily
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Halophytes can grow on physiological dry soil due to

  1. Dry soil

  2. Excessive humidity outside

  3. Excessive salts in plants

  4. Excessive salts in water
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which one is a xerophyte?

  1. Capparis

  2. Lotus

  3. China Rose

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

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

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

  1. Xerophytes

  2. Halophytes

  3. Hydrophytes

  4. Mesophytes
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Succulent xerophytes are likely to be found in

  1. Tropical rain forest

  2. Deciduous forest

  3. Desert

  4. Tundra
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

A plant growing on a forest floor

  1. Has shallow roots

  2. Requires low light

  3. Has a deep tap root

  4. Requires strong light

  5. Requires moist soil
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

The features of the xerophytic plant leaves are:

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

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

  2. (i) and (iii)

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

  4. (i) and (iv)
Reveal answer Fill a bubble to check yourself
B Correct answer
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.