Tag: know the plant world closely

Questions Related to know the plant world closely

A fungus which grows on a host but can also subsist on organic matter is

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

  1. Obligate parasite

  2. Obligate saprophyte

  3. Facultative saprophyte

  4. Facultative parasite

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Correct Option: C

To digest the food that lies in external medium, a saprophyte secretes

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

  1. Enzymes

  2. Hormones

  3. Sugar

  4. None of the above

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Correct Option: A

The bacteria and fungi which feed on dead organic matter are called

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

  1. Parasites

  2. Saprophytes

  3. Lithophytes

  4. Dimorphic

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Correct Option: B

Which one of the following is a partial root parasite?

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

  1. Balanophora

  2. Santalum

  3. Viscum

  4. Cuscuta

Show answer
Correct Option: B
Explanation:
Santalum album is a partial root parasite because it photosynthesizes its own food, but taps the roots of other species for water and inorganic nutrients. so it depends only partially on the host. It grows on the roots of Dalbergia, Eucalyptus, and Albizzia.
So, the correct option is 'Santalum'.

A partial parasite is?

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

  1. Cuscuta

  2. Cassytha

  3. Arceuthobium

  4. Viscum

Show answer
Correct Option: D
Explanation:

Viscum is a partial stem parasite among the following because it depends on its host for only water and minerals. It can prepare its own food through photosynthesis as it is chlorophyllous.

So the correct option is 'Viscum'.

Monotropa is a

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

  1. Saprophyte

  2. Symbiont

  3. Parasite

  4. Insectivorous plant

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Correct Option: A
Explanation:
Monotropa is a Saprophyte.

Monotropa uniflora (Indian pipe) is a small, low-lying wild flower. It lacks chlorophyll accounting for its translucent white colour. Because it cannot synthesise its own energy, this plant is saprophyte.

Insectivorous plant with rosette of spiny margined bilobed hinged and winged leaves for catching the prey is?

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

  1. Nepenthes

  2. Drosera

  3. Dionaea

  4. Utricularia

Show answer
Correct Option: C
Explanation:

Dionaea, also called as venus fly trap has modified itself in order to meet the requirements of nitrogen. Its leaves are turned into bilobed flap-like structures or winged structures surrounded by spines on the margins so that they can trap the insects laying on them.

So the correct answer is 'Dionaea'.

Which one of the following is a total root parasite?

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

  1. Balanophora$/$ Orobanche

  2. Viscum

  3. Cassytha

  4. Drosera

Show answer
Correct Option: A
Explanation:

Balanophora is a total root parasite because it sucks sugars, minerals and also water from the roots of host plants like cabbage etc for its survival, in turn, harming the host.

So, the correct option is 'Balanophora/ Orobanche'.

Weight of the largest flower of Rafflesia is

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

  1. $1$kg

  2. $4$kg

  3. $6$kg

  4. $11$kg

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Correct Option: C
Explanation:

Rafflesia bears the largest flowers of the angiosperms. The flowers can grow to 3 feet and can weigh up to 6 kilograms. The plant is parasitic and the vegetative parts are not visible. The flowers are unisexual. The foul smell produced by the flower attracts the pollinator insects.  

Hence, the correct answer is '6kg'

Which one is the largest root parasite?

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

  1. Rafflesia

  2. Monotropa

  3. Arceuthobium

  4. All the above

Show answer
Correct Option: A
Explanation:

A. The largest root parasite is rafflesia because rafflesia blooms the largest flower grows to be 3 ft across and almost 50 pounds. The only visible parts of this parasite are usually its flower.

B. Monotropa is not a parasite but saprophyte
C. Arceuthobium is the smallest parasite about 5mm diameter.
so, the correct option is 'Rafflesia'.