Q2. The Big Bang theory attempts to explain the origin of โ
Anonymous Quiz
15%
Life
50%
Universe
13%
Water bodies
22%
All of the above
Q3. Who proved that life comes only from pre-existing life?
Anonymous Quiz
17%
Greek thinkers
59%
Louis Pasteur
22%
Miller
2%
Urey
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Q4. According to Darwin, fitness refers to โ
Anonymous Quiz
13%
Physical fitness
15%
Mental fitness
28%
Reproductive fitness
43%
All of the above
โค1
Q5. H.M.S. Beagle is โ
Anonymous Quiz
19%
A theory
42%
A scientist
32%
A ship
7%
A religious place
How many wrinkled green seeds were produced in the F2 generation of Mendelโs dihybrid cross?
Anonymous Quiz
32%
9
49%
3
12%
2
7%
1
Dream big, but work harder โ because 0 effort gives 0 success.
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@Adda247Science
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In Mendelโs dihybrid cross, maximum number of phenotype in F2 generation was โ
Anonymous Quiz
16%
Wrinkled green
53%
Round yellow
21%
Wrinkled yellow
10%
Round green
Physical appearance of characters is called โ
Anonymous Quiz
12%
Karyotype
64%
Phenotype
14%
Homozygous
11%
Genotype
Given below are two statements:
Statement I: A cross of a pea plant with yellow and round seeds and one with green and wrinkled seeds is a monohybrid cross.
Statement II: The phenotypic ratio of a dihybrid cross is 9:3:3:1
Statement I: A cross of a pea plant with yellow and round seeds and one with green and wrinkled seeds is a monohybrid cross.
Statement II: The phenotypic ratio of a dihybrid cross is 9:3:3:1
Anonymous Quiz
31%
Both statement I and II are correct
28%
Both statement I and II are incorrect
23%
Statement I is correct and statement II is incorrect
19%
Statement I is incorrect and statement II correct
๐1
Assertion (A): In Mendelโs study of inheritance of two genes, green colour was dominant over yellow and wrinkled shape dominant over round.
Reason (R): rrYy denotes wrinkled yellow phenotype.
Reason (R): rrYy denotes wrinkled yellow phenotype.
Anonymous Quiz
30%
Both A and R are true and R is the correct explanation of A
38%
Both A and R are true but R is not the correct explanation of A
14%
A is true but R is false
18%
A is false but R is true
The phenotypic ratio of Mendelโs dihybrid cross of F2 generation was
Anonymous Quiz
15%
3:1
17%
10:1
64%
9:3:3:1
4%
2:1
โค1
The trait chosen by Mendel for studying inheritance by two genes was
Anonymous Quiz
20%
Stem height and flower colour
52%
Seed shape and seed colour
17%
Flower colour and flower position
11%
Pod colour and pod shape
โค1
What was the phenotype of the F1 generation when Mendel crossed round yellow and wrinkled green seeds?
Anonymous Quiz
16%
All wrinkled green
54%
50% wrinkled and 50% green
18%
All round yellow
12%
50% round and 50% yellow
โค1
How many types of gametes will be produced by an organism having genotype RrYy?
Anonymous Quiz
14%
40
53%
4
23%
20
11%
2
โค1
When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters. This is โ
Anonymous Quiz
18%
Law of dominance
40%
Law of segregation
37%
Law of Independent assortment
5%
None of the above
โค1๐ค1
Everyone blooms at their own pace
Thereโs no too early or too late โ
Your time will come, and it will be perfect.
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What are the harmful effects of UV-B radiation?
Anonymous Quiz
13%
Causes aging of skin
25%
Damages the skin cells
18%
Causes skin cancers
44%
All of the above
โค1
In human eye ________ absorbs UV-B radiation.
Anonymous Quiz
24%
Iris
23%
Choroid
40%
Retina
13%
Cornea
Which of the following was signed to control the emission of ozone depleting substances?
Anonymous Quiz
33%
The Earth Summit
35%
The Worldโs Summit
23%
The Montreal Protocol
9%
None of the above