Tag: know the plant world closely

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Questions Related to know the plant world closely

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Which one of the following is a parasitic plant?

  1. Drosera

  2. Cuscuta

  3. Nepenthes

  4. Utricularia

  5. Water Hyacinth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$\Rightarrow$ Cuscuta (Option B)
$\rightarrow$ Characteristics of cuscuta
$\rightarrow$ Cuscuta(dodder) is a parasitic plant. It has no chlorophyll and cannot make its own food by photosynthesis.
$\rightarrow$ It grows on other plants, using their nutrients for its growth and weakening the host plant.
$\rightarrow$ Cuscuta is a leafless plant with branching stems ranging in thickness from thread like filaments to heavy cords.
$\rightarrow$ The mature plant leaves its entire like without touching or attachment to the ground.
Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Aerial absorptive root occur in

  1. Epiphytes

  2. Mesophytes

  3. Hydrophytes

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

Epiphytes are plants that grow attached to other plants. Epiphytes and climbing plants have aerial roots that anchor the plant to the bark, branch or another surface on which it grows. Aerial roots of some epiphytes are specialized not only for anchorage but some have photosynthetic roots (some epiphytic orchids), some absorb water. Some parasitic epiphytes, such as mistletoe (Phorodendron sp, etc.), have roots that penetrate the host plant tissues and absorb nutrients.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Which of the following plants shows the saprotrophic mode of nutrition?

  1. Dodder

  2. Venus fly trap

  3. Nepenthes

  4. Mushroom
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While mushrooms are actually fungi rather than plants, they exhibit saprotrophic nutrition by obtaining nutrients from dead and decaying organic matter in soil. Unlike the other options which are parasitic or carnivorous plants, mushrooms are decomposers.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

An obligate root parasite is 

  1. Viscum

  2. Striga

  3. Loranthus

  4. Rafflesia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rafflesia is an example of the obligate root parasites. These parasites are organism which cannot complete its life cycle without a host. It is done with the help of an absorptive organ, the haustorium.

So the correct option is D.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Plants obtaining nourishment from other plants by haustoria are

  1. Epiphytes

  2. Parasites

  3. Xerophytes

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

Parasitic plants obtain their nutritional requirements from a host plant. 

They make it possible with a special organ called the haustorium, which invades host plant tissues and withdraw the necessary water and nutrients for the plant's growth.
So the correct option is B.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

A parasite living within tissue of host is 

  1. Epiphyte

  2. Endophyte

  3. Ecotophyte

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

A bacteria or fungi that lives within in a plant within the intercellular spaces, tissue cavities, or vascular bundles without harming the host is called as endophytes. They often benefit the host.

So the correct option is B.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Parasitic phanerogams absorb water and solute from host plant by

  1. Mycorrhiza

  2. Clinging roots

  3. Adventitious roots

  4. Haustoria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parasitic plants are those which depend on other plants for their food either completely or incompletely. These plants produce a special organ called haustorium which produce adventitious roots to absorb food and nutrients.

So the correct option is D.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Symbiotic relationship is seen in which of the following family of plants?

  1. Dal Family

  2. Daisy Family

  3. Rose Family

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

Legume family plants (Fabaceae), including pulses referred to as 'dal' in Indian languages, form well-known symbiotic relationships with nitrogen-fixing bacteria (Rhizobium) in root nodules. This mutualistic relationship provides plants with nitrogen while bacteria receive carbohydrates.