Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

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

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

  1. Chloroplast

  2. Cytoplasm

  3. Mitochondria

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

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

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

  1. Acrocentric

  2. Sub meta centric

  3. Meta centric

  4. Telocentric
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

Select the incorrect match from the following

  1. Submatacentric chromosomes - L shaped chromosomes

  2. Allosomes - sex chromosomes

  3. Lampbrush - Diplotene bivalents

  4. Polytene chromosomes- oocytes of amphibians
Reveal answer Fill a bubble to check yourself
A Correct answer
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.'
Multiple choice botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

Which chromosome may be lost during cell division?

  1. Giant chromosome

  2. Acentric chromosome

  3. Polycentric chromosome

  4. Telocentric chromosome
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. Psilotum, Lycopodium, Pteris and Adiantum

  2. Selaginella, Salvinia, Lycopodium and Pteris

  3. Salvinia, Lycopodium, Selaginella and Psilotum

  4. Salvinia, Selaginella, Azolla and Lycopodium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heterospory and heterophily are advanced traits found in genera like Selaginella, Salvinia, and Azolla. Psilotum, Lycopodium, Pteris, and Adiantum are generally homosporous and do not exhibit these traits.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which statement is correct for homosporus pteridophyta ?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In homosporous pteridophytes, the gametophyte (prothallus) is typically small, independent, and autotrophic, while the sporophyte is the dominant, independent, and autotrophic phase. Option A correctly identifies the autotrophic nature of the gametophyte.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

The plants with primitive vascular tissue are called

  1. Bryophytes

  2. Pteridophytes

  3. Angiosperms

  4. Gymnosperms
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. Equisetum

  2. Fern

  3. Lycopodium

  4. Psilotum
Reveal answer Fill a bubble to check yourself
A Correct answer
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.