Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

In what way does a fungus growing around the roots of higher plants benefit them?

  1. It products antimicrobial substances

  2. It produces growth promoting substances

  3. It helps in absorbing water nitrogen and other minerals

  4. All of them
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The associations between roots and fungi are called mycorrhizae. The roots provide essential nutrients for the growth of the fungi. In return, the large mass of fungal hyphae acts as a virtual root system for the plants, increasing the amount of water and nutrients that the plant may obtain from the surrounding soil. So, the correct option is "D" (All of them)
Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Mycorrhiza acts as

  1. Mechanical tissue

  2. Root hair in adverse conditions

  3. Modified root

  4. Organ for vegetative propagation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mycorrhizae extend the root system's reach, helping plants absorb water and nutrients, effectively acting like root hairs, especially in nutrient-poor or adverse soil conditions.

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

The symbiotic association between fungi and roots of higher plants is referred to as:

  1. lichen

  2. mycorrhiza

  3. biofertiliser

  4. biocontrol agent
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The symbiotic association between fungi and roots of higher plants is referred to as mycorrhiza.
  • The plant supports the fungus by providing carbohydrates needed for fungal growth, while the fungus helps the plant by increasing its root surface area.
  • So, the correct answer is 'Mycorrhiza'.
Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Select correct statement w.r.t. mycorrhiza 

  1. Ectomycorrhiza forms hartig net in the intracellular spaces of cortex cells

  2. Endotrophic mycorrhiza are mostly basidiaamycetes members

  3. VAM is a special type of endomycorrhiza and absorbs phosphate

  4. Mycorrhizal or fungal roots have root cap and root hairs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • The ectomycorrhiza's hyphae does not penetrate the cortex cells and they only colonize in the intercellular spaces between them, and this network of hyphae are called as hartig net. So, the first statement is correct.
  • The endotrophic mycorrhiza are a type of arbascular mycorrhiza.
  • Vesicular arbascular mycorrhiza help the plants to grow well by colonizing their roots and helping them to efficiently absorb the phosphate in the soil.
  • So the correct option is 'VAM is a special type of endomycorrhiza and absorbs phosphate'.

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Which one of the following is a useful functional association between fungi and the roots of higher plants?

  1. Lichen

  2. Coralloid root

  3. Biofertilizer

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

Mycorrhiza is a useful functional association between fungi and the roots of higher plants in which fungi absorb nutrients from the soil as their roots are not such strong and the tree provides food to the fungi. The best example is Orchid mycorrhiza

So the correct option is 'Mycorrhiza'

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

VAM (Vesicular-arbuscular mycorrhizae) represents

  1. Saprophytic bacteria

  2. Symbiotic fungi

  3. Saprophytic fungi

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

Mycorrhiza biofertilizer is also known as VAM, adheres to plants rhizoids leading to development of hyphae. Hyphae boost development and spreading of white root in to soil leading to significant increase in rhizosphere. These hyphae further penetrate and form arbuscules within the root cortical. VAM fungi form a special symbiotic relationship with roots of plant that can enhance growth and survivability of colonized plants. Mycorrhiza biofertilizer is very useful in organic farming as well as normal commercial farming. So, VAM is a symbiotic fungi and not a parasitic algae, saprophytic bacteria and saprophytic fungi. Thus, the correct answer is option B.