MCQ
Origin of earth dates back to
  • A
    $10,000-15,000$ million years ago
  • $4000-4600$ million years ago
  • C
    $500-1000$ million years ago
  • D
    $2000-3000$ million years ago

Answer

Correct option: B.
$4000-4600$ million years ago
b
Origin of universe = $20\; billion$ years ago
Origin of earth = $4.5\; billion$ years ago

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

In gel electrophoresis, the sample $DNA$ is cut into fragments by
N2-fixing bacteria in non-legume plants are:
In Antirrhinum two plants with pink flowers were hybridized. The $ F_1$ plants produced red, pink and white flowers in the proportion of $1$ red, $2$ pinkand $1$ white. What could be the genotype of the two plants used for hybridization ? Red flower colour is determined by $RR$, and white by $rr$ genes?
EcoRI cleaves DNA strands to produce:
$A$ : The interaction between sea anemone and clown fish is commensalism.
$R$ : The fish gets protection from predators but anemone does not appear to derive any benefit.
Control of many diseases such as plague, smallpox, malaria etc causes:
The glandular tissue of each breast is divided into 15-20 :
Suresh and Rajesh have defective haemoglobin due to genetic disorders. In Suresh, the problem is qualitative as he is having incorrectly functioning globin molecules while in Rajesh the problem is quantitative as he is having very few globin molecules. Identify the disorder they are suffering from.
SureshRajesh
AThalassemia - Autosomal Dominant blood disorderSickle Cell Anaemia - Autosomal linked Recessive trait
BSickle Cell Anaemia - Autosomal linked Dominant traitThalassemia - Autosomal Recessive blood disorder
CSickle Cell Anaemia – Autosomal linked Recessive traitThalassemia – Autosomal Recessive blood disorder
DThalassemia - Autosomal Dominant blood disorderSickle Cell Anaemia - Autosomal linkedDominant trait
On which ship Darwin was appointed as the nature scientist.
Which of the following help in repairing of DNA?