Biology GK · all questions

Plant Anatomy and Physiology
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

999

Questions

37/50

Page

Pick an option on a question to see the right answer and solution.

Q721

Early blight of potato spreads and becomes serious when the season begins with

Select an option to see the answer and solution.

Q722

Which of the following is a free living, nitrogen-fixing organism?

Select an option to see the answer and solution.

Q723

Which of the following is an example of rooted hydrophyte with floating leaves?

Select an option to see the answer and solution.

Q724

Common examples of the non-parasitic diseases include

Select an option to see the answer and solution.

Q725

Dry and scaly bracts found in association with spikelet infloroscence are known as

Select an option to see the answer and solution.

Q726

In case of severe infection of blast disease of rice, the plants wither at the

Select an option to see the answer and solution.

Q727

The portion of the earth in which ecosystems operate is called the

Select an option to see the answer and solution.

Q728

The megaspore mother cell nucleus after dividing meiotically forms four haploid megaspores which are arranged in a linear tetrad, of which the lower most megaspore is functional in case of

Select an option to see the answer and solution.

Q729

Which of the following methods is based on the act that tissue will not gain or lose water to the atmosphere when the vapour pressure of air corresponds to the water potential of the tissue?

Select an option to see the answer and solution.

Q730

Assertion (A) The lenticel is meant for gaseous exchange.
Reason (R) Lenticel checks excessive evaporation of water.

Select an option to see the answer and solution.

Q731

Consider the following statements regarding chasmophytes and choose the correct answer:
1. Chasmophytes are plants rooted in fissures or clefts and crevices of rocks which are filled with earth, dust and other gravel or rock-debris
2. Chasmophytic flora consists of all types, they belong to Thallophyta, Bryophyta, Pteridophyta and Spermatophyta
3. Rhizoids and roots of chasmophytes are often constricted within narrow clefts and flattened out as thin filamentous structures
4. If the rock is provided with clefts and crevices, lithophytes along chasmophytes develop in these

Select an option to see the answer and solution.

Q732

At which level of the pyramid of energy the amount of the total energy is the highest?

Select an option to see the answer and solution.

Q733

The fraction of the total amount of a substance in a component which is released in a given time is called

Select an option to see the answer and solution.

Q734

The whole fruit body of which of the following spores of Fusarium oxysporum is called the sporodochium?

Select an option to see the answer and solution.

Q735

Which of the following is a plant tissue?
1. Meristematic tissue
2. Permanent tissue

Select an option to see the answer and solution.

Q736

In C₄ plants, the atmospheric CO₂ is accepted by

Select an option to see the answer and solution.

Q737

The part of life cycle of Puccinia which is passed on the grain host or the wheat plant represents the

Select an option to see the answer and solution.

Q738

Advantages of self-pollination include

Select an option to see the answer and solution.

Q739

Which of the following statements about phloem transport is correct?

Select an option to see the answer and solution.

Q740

A natural process observed in lakes and tanks where the rich growth of micro-organisms consumes much of the dissolved oxygen, tending to deprive other organisms is known as

Select an option to see the answer and solution.

Prev 35 36 37 38 39 Next