Tag: alternation of generations

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Questions Related to alternation of generations

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

The leaves which fall down very soon after their formation are

  1. Deciduous

  2. Caducous

  3. Evergreen

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

Depending upon the duration of leaf, the plants can be classified into caducous, decidous and evergreen. In evergreen plants, leaves are present in all the seasons and do not shed off combindled. Example includes Pine. In deciduous plants, all the leaves shed at one time. Hence, deciduous plants are without leaves during one season. Example includes Ficus. In caducous plants, leaves shed off as the new bud formation takes place. Example includes rose. In this, the leaves fall down very soon after their formation. Thus, the correct answer is 'Caducous.'

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

Plants without leaves during one season are ________.

  1. Caducous

  2. Deciduous

  3. Evergreen

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

Depending upon the duration of leaf, the plants can be classified into caducous, decidous and evergreen. In evergreen plants, leaves are present in all the seasons and do not shed off combindly. Example includes Pine. In deciduous plants, all the leaves shed at one time. Hence, deciduous plants are without leaves during one season. Example includes Ficus. In caducous plants, leaves shed off during new bud formation. Example includes rose.

Thus, the correct answer is 'Deciduous.'

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

Independent alternation of generations is present in

  1. Angiosperms

  2. Gymnosperms

  3. Pteridophytes

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

The Pteridophytes are independent of alteration in generation. They can live “independent of the parent plant”. While gametophytes cannot live independently and are very small. The pteridophytes have a vascular plant.

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

A plant living for a few days is called

  1. Annual

  2. Ephemeral

  3. Biennial

  4. Perennial
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Ephemeral is any short-lived plant, usually has one or more generations per year, growing only during favorable periods (as when adequate moisture is available) and passing the unfavorable periods in the form of seeds. 
  • Hence the correct option is B. 
Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

The plants that live for more than two years are called :

  1. Annuals

  2. Perennials

  3. Biennials

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

A.Annuals – Plants with a life span of one year or one season.

B.Perennials – Plants with a life span of more than two years.

C.Biennials – Plants with a life span of two years

D.Triennials – Plants with a life span of three years.

So, the correct option is ‘Perennials’

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

A biennial plant is one which ___________________.

  1. Lives for two years but flowers towards the end of the second year

  2. Produces two sets of flowers in a year

  3. Grows during the second year from seeds shed turning the previous year

  4. Lives and grows from year to year
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A biennial plant completes its life cycle in two years. It grows vegetatively in the first year and flowers, produces seeds, and dies in the second year.

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

Put a tick mark against the correct alternative in the following statements :
Identify the Kharif crop :

  1. Barley

  2. Mustard

  3. Rice

  4. Wheat
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

The crops are usually sown at the beginning of the monsoon season around June and harvested by September or October are called Kharif crops. Eg:Barley, Rice.

So, the correct option is ‘Barley and Rice’.