Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

Assertion : Paraguay tea is obtained from Paullinia cupana

Reason :Tea is obtained from Camellia sinensis

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Paraguay tea is obtained from leaves of evergreen tree Ilex paraguariensis. 

All the leaves are used. Tea is obtained from the leaves of Camellia sinensis of family Theaceae. 
So, the correct answer is 'If the assertion is false but reason is true'

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The evolution of cultivated cotton is an example of _______________.

  1. Distant hybridization and polyploidy
  2. Diploidization of sterile $F _1$

  3. lntergeneric hybridization and polyploidy

  4. Interspecific hybridization and polyploidy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cultivated cotton (Gossypium hirsutum) evolved through the hybridization of two different species followed by polyploidy (allotetraploidy).

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

In crop improvement programmes, haploids are of  great importance because they ___________________.

  1. Grow better even under adverse climatic conditions

  2. Are useful in studies of meiosis.

  3. Have less requirement for energy inputs

  4. Give homozygous lines following diploidization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Haploids are useful in plant breeding because they can be doubled (diploidized) to produce completely homozygous lines in a single generation.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

Match List-I(Transgenic variety of crop) with List-II(Trait for which gene has been incorporated) and select the correct answer using the given the lists.

List-I List-II
a. Seed link maixe $1$. Virus resistance
b. Rainbow papaya $2$. Herbicide resistance
c. Flavor Savr tomato $3$. Altered ripening
$4$. Insect resistance
  1. A-$2$, B-$1$, C-$3$
  2. A-$2$, B-$3$, C-$1$
  3. A-$4$, B-$3$, C-$1$
  4. A-$4$, B-$1$, C-$3$
Reveal answer Fill a bubble to check yourself
A Correct answer