Tag: botany

Questions Related to botany

Starting with microspore mother cells, what is the least number of meiotic and mitotic divisions needed for the formation of $500$ male gametes in an angiosperm?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $65$ and $500$

  2. $63$ and $252$

  3. $63$ and $500$

  4. $63$ and $504$

Show answer
Correct Option: C
Explanation:

In angiosperms, one microspore mother cell undergo meiosis, form into four microspores or pollen grains. Each pollen grain by undergoing two mitotic divisions produces two male gametes. 63 microspore mother cells undergo 63 meiotic divisions and form into 252 microspores or pollen grains. These microspores undergo 500 mitotic divisions and form into 500 male gametes.

So, the correct option is ’63 and 500’. 

A seed is

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. A female gametophyte

  2. A mature pollen tube

  3. A mature ovule

  4. A mature ovary

Show answer
Correct Option: C
Explanation:

When the male nucleus fertilizes the egg cell, the entire ovule is converted into a structure which is known as a seed. The endosperm which is formed after double fertilization or triple fusion nourishes this growing seed.

So, the correct option is 'a mature ovule'

How many meiotic divisions are required to produce 250 pollen grains in an angiosperm?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. 60

  2. 63

  3. 626

  4. 312

Show answer
Correct Option: B

Pinus/Cedrus Differs from angiospermic plants in the absence of ________________.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Flowers

  2. Fruits

  3. Enclosed seeds

  4. All the above.

Show answer
Correct Option: A

Find correct match
Column  I                 Column  II
a.  Sinigrin              (i)  Liliaceae
b.  Carthamin        (ii) Brassicaceae
c.  Atropine          (iii) Solanaceae
d.  Aloin               (v)  Asteraceae

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $a(ii),b(iv),c(iii),d(i)$

  2. $a(ii),b(iv),c(i),d(iii)$

  3. $a(i),b(ii),c(iii),d(iv)$

  4. $a(ii),b(ii),c(iv),d(iii)$

Show answer
Correct Option: B
Explanation:

Sinigrin is a glucosinolate that belongs to the family of glucosides found in some plants of the Brassicaceae family such as Brussels sprouts, broccoli etc. Carthamin is a natural red pigment obtained from safflower oilseed crops belongs to the family Asteraceae. Atropine and vasopressors act to combat bradycardia and hypotension and are derived from the plants that belong to the family Liliaceae.  Aloe vera produces secondary metabolites, such as aloin, which is used in cosmetics and this plant belongs to the family Solanaceae.

So, the correct option is ' a(ii),b(iv),c(i),d(iii)'.

The plant 'Hibisus' belongs to division _____

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Bryophta

  2. Pteridophyta

  3. Gymnosperms

  4. Angiosperms

Show answer
Correct Option: D
Explanation:

A.Bryophyta – chlorophyllous, aquatic, embryophytic, archegoniatic, plants in the plant kingdom. These are also called amphibian of the plant kingdom.

B.Pteridophyta – Chlorophyllous, terrestrial, embryophytic, tracheophytes in the plant kingdom. These are also called vascular cryptogams.

C.Gymnosperms – Naked seeded plants in the plant kingdom.

D.Angiosperms -  Fruit producing plants in the plant kingdom. These are highly advanced plants. Hibiscus is an angiosperm.

So, the correct option is ‘ Angiosperms’.

Consider the following statements:

(a) Plants are divided into five groups: Thallophytes, Bryophytes, Pteridophytes, gymnosperms, and Angiosperms.
(b) Monera is divided into Archaebacteria and Eubacteria.
(c) $Penicillium$ and Yeast both belong to group fungi.

Which of the above statements are correct?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. (a) and (b)

  2. (b) and (c)

  3. (a), (b) and (c)

  4. None of these

Show answer
Correct Option: C
Explanation:

The first level of classification among plants depends on whether the plant body is well-differentiated or not. The next level of classification is based on whether the differentiated body has special vascular tissues for the transport of water and other substances. Further classification is based on the ability to bear seeds and whether the seeds are naked or enclosed within fruits. 
Monera is a kingdom that contains unicellular organisms with no nuclear membrane, such as bacteria. It can be divided into Archaebacteria and Eubacteria.
A fungus is any member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. Penicillium and Yeast both belong to group fungi.

The orchid plants, which are found growing on the trees, are

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Parasites

  2. Epiphytes

  3. Saprophytes

  4. Lithophytes

Show answer
Correct Option: B
Explanation:

Different types of epiphytes may grow on the same tree, including orchids. The name 'epiphyte' comes from the Greek word 'epi' meaning 'upon' and 'phyton' meaning 'plant'

So, the correct answer is 'Epiphytes'

Umbrella plant is

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Melia azedarach

  2. Panicum decompositum

  3. Acetabularia

  4. Acacia oswaldii

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Correct Option: A

Characteristic of series thalamiflorae is

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Absence of disc below ovary

  2. Presence of nectariferous disc below ovary

  3. Presence of non-nectariferous disc below ovary

  4. Occurrence of gynophore

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Correct Option: A