Tag: botany

Questions Related to botany

.......... are the storage bubbles of cells.

botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

  1. Chloroplast

  2. Cytoplasm

  3. Mitochondria

  4. Vacuole

Show answer
Correct Option: D
Explanation:

Vacuoles are the membrane-bound storage bubbles found in cells. They are large and centrally located in plant cell whereas in animal cells either they are too small or absent .They can store food materials, waste products, water etc.

In which chromosome the centromere is located at the terminal end of the chromosome

botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

  1. Acrocentric

  2. Sub meta centric

  3. Meta centric

  4. Telocentric

Show answer
Correct Option: D
Explanation:
  • A telocentric chromosome, the centromere is located at the terminal end of the chromosome. 
  • A telocentric chromosome has therefore only one arm.
  • Telomeres may extend from both ends of the chromosome, their shape is similar to letter I during anaphase. 
  • Hence, In the chromosome in which the centromere is located at the terminal end of the chromosome is Telocentric.
  • So, the correct answer is 'Telocentric'.

Select the incorrect match from the following

botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

  1. Submatacentric chromosomes - L shaped chromosomes

  2. Allosomes - sex chromosomes

  3. Lampbrush - Diplotene bivalents

  4. Polytene chromosomes- oocytes of amphibians

Show answer
Correct Option: A
Explanation:
Metacentric Chromosomes
Metacentric chromosomes have the centromere in the center, such that both sections are of equal length. Human chromosome 1 and 3 are metacentric.

Submetacentric Chromosomes
Submetacentric chromosomes have the centromere slightly offset from the center leading to a slight asymmetry in the length of the two sections. Human chromosomes 4 through 12 are submetacentric.

Acrocentric Chromosomes
Acrocentric chromosomes have a centromere which is severely offset from the center leading to one very long and one very short section. Human chromosomes 13,15, 21, and 22 are acrocentric.

Telocentric Chromosomes
Telocentric chromosomes have the centromere at the very end of the chromosome. Humans do not possess telocentric chromosomes but they are found in other species such as mice.

So, the correct answer is 'Submetacentric chromosomes-L shaped chromosomes.'

Which chromosome may be lost during cell division?

botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

  1. Giant chromosome

  2. Acentric chromosome

  3. Polycentric chromosome

  4. Telocentric chromosome

Show answer
Correct Option: B
Explanation:

Acentric chromosome may lost during cell division as centromere is absent in them. During metaphase and anaphase spindle fibres are not attached with them and so they are not able to reach to the poles.

Which of the following set is not show heterospory and heterophily?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Psilotum, Lycopodium, Pteris and Adiantum

  2. Selaginella, Salvinia, Lycopodium and Pteris

  3. Salvinia, Lycopodium, Selaginella and Psilotum

  4. Salvinia, Selaginella, Azolla and Lycopodium

Show answer
Correct Option: A

In fern sex organ are found on :-

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Protonema

  2. Prothallus

  3. Sporophyte

  4. Sporophyll

Show answer
Correct Option: B
Explanation:

The antheridium (male organ) is located on the lower surface of the fern prothallus and the archegonium (female organ) is located on the upper surface of the fern prothallus.

So, the correct option is 'prothallus'.

Vascular cryptogams are

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Pteridophytes

  2. Angiosperms

  3. Mosses

  4. Algae

Show answer
Correct Option: A
Explanation:

Cryptogams are defined as lower plants or plant-like organisms, that reproduce by spores. Vascular Cryptogams refers to those vascular plants, that do not make seeds.

Which statement is correct for homosporus pteridophyta ?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Gametophyte is autotrophic, whille sporophyte is parasitic

  2. Gametophyte is semi parasite and sporophyte is autotrophic

  3. Gametophyte and sporophyte are usually parasitic

  4. Sporophyte is autotrophic

Show answer
Correct Option: A

The plants with primitive vascular tissue are called

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Bryophytes

  2. Pteridophytes

  3. Angiosperms

  4. Gymnosperms

Show answer
Correct Option: B
Explanation:
A. Bryophytes are the first land inhabiting or terrestrial plants. They are non vascular, terrestrial, non-flowering and non-seeded plants.
B. Pteridophytes are also known as vascular cryptograms. They are seedless vascular plants which have vascularised root, stem and leaves. 
C. Gymnosperms are the naked seeded plants.
D. Angiosperms are seed bearing and flowering vascular plants which have their seeds enclosed in fruits.
Hence, plants with primitive vascular tissue are called Pteridophytes.
So, the correct answer is 'Pteridophytes'.

The pteridophyte, popularly known as 'horsetail' or a 'scouring rush' is

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Equisetum

  2. Fern

  3. Lycopodium

  4. Psilotum

Show answer
Correct Option: A
Explanation:

Horsetail is in a family of plants containing about 35 species within the genus Equisetum. Scouring rush (Equisetum hyemale) is evergreen, with leafless, hollow, segmented stems with ash-colored bands. Stems grow to about 1/2 inch in diameter and reach up to five feet tall. Because the stems are rough and durable (due to their high silica content), they were called as scouring rushes, because early pioneers used them to scrub pots and pans.