Whose work on population influenced Darwin’s theory?
Anonymous Quiz
30%
Lamarck
43%
Thomas Malthus
24%
Ernst Heckel
3%
Karl von Baer
Who proposed the concept of saltation (sudden large mutation)?
Anonymous Quiz
33%
de Vries
40%
Miller
15%
Urey
11%
Haldane
🤗1
This media is not supported in your browser
VIEW IN TELEGRAM
Everyone wants to do everything at once…but only the consistent one wins 🏆Choose focus over chaos.
⦿ 𝗝𝗢𝗜𝗡 ➣ @ADDA247SCIENCE
⦿ 𝗝𝗢𝗜𝗡 ➣ @ADDA247SCIENCE
This media is not supported in your browser
VIEW IN TELEGRAM
Wishing you a blessed Guru Nanak Jayanti filled with joy, peace, and divine guidance.
⦿ 𝗝𝗢𝗜𝗡 ➣ @ADDA247SCIENCE
⦿ 𝗝𝗢𝗜𝗡 ➣ @ADDA247SCIENCE
❤2
Allele frequencies stay constant across generations under which principle?
Anonymous Quiz
15%
Allen’s rule
60%
Hardy-Weinberg’s principle
19%
Darwin’s theory
7%
Biogenesis
👍1
👍1💯1
Hugo de Vries studied which plant to propose mutation theory?
Anonymous Quiz
18%
Dandelion
30%
Eicchornia
35%
Evening primrose
17%
Snapdragon
Darwin’s theory is based on branching descent and natural selection. Are both factual?
Anonymous Quiz
36%
Both correct
21%
Both incorrect
32%
I correct, II incorrect
11%
I incorrect, II correct
Disturbance in Hardy-Weinberg equilibrium results in:
Anonymous Quiz
11%
Reproduction
57%
Evolution
20%
Immigration
12%
Emigration
❤3
Gene flow occurs when gene migration happens:
Anonymous Quiz
16%
Once
43%
Twice
14%
Thrice
28%
Multiple times
What represents the best method for producing salicylic acid?
Anonymous Quiz
22%
Benzoic acid, strong base, high temperature
31%
Toluene, strong base, high temperature
37%
Phenol, base carbon dioxide then acid
10%
Bromobenzene, carbonic acid, high temperature
Which of the following acids dissociates to the greatest extent in the aqueous solution?
Anonymous Quiz
24%
Trichloroacetic acid
44%
Acetic acid
23%
Chloroacetic acid
9%
Dichloroacetic acid
❤2
Which acid is present in vinegar?
Anonymous Quiz
17%
Formic acid
63%
Acetic acid
12%
Butyric acid
9%
Tartaric acid
Which one of the following acid does not have a carboxylic group?
Anonymous Quiz
11%
Methanoic acid
22%
Ethanoic acid
15%
Propanoic acid
53%
Picric acid
❤2
Last 90 Days Strategy to Score 95% in Class 12 Physics Board 2026 | November to February Roadmap 💪
watch this video
watch this video
CH₃MgBr + CO₂ (Dry ether) → Y; H₃O⁺ → Z. Identify Z from the following:
Anonymous Quiz
30%
Ethyl acetate
34%
Acetic acid
25%
Propanoic acid
12%
Methyl acetate
The compound that does not liberate CO₂ on treatment with aqueous sodium bicarbonate solution is:
Anonymous Quiz
16%
Benzoic acid
37%
Benzenesulphonic acid
30%
Salicylic acid
16%
Carbolic acid (Phenol)
The reaction of CO₂ with sodium phenoxide at 400 K results in –
Anonymous Quiz
18%
Benzoic acid
43%
Sodium benzoate
29%
Salicylaldehyde
10%
Sodium salicylate
आ गयी Pre Board Exam Datesheet 2025-26 Out | CBSE Class 10 and 12 Latest Update🔥📑
https://youtu.be/fr7LwVE6sBE
https://youtu.be/fr7LwVE6sBE