Which of the following best describes a key difference between Darwin's and Lamarck's theories of evolution?
A) Darwin believed traits were inherited through genes, while Lamarck believed traits were not inherited.
B) Lamarck believed species never change, while Darwin believed they do.
C) Darwin believed evolution happens through natural selection, while Lamarck believed it happens through use and disuse of traits.
D) Both Darwin and Lamarck believed that evolution is a sudden and random process.
Write your answer under the comment section
A) Darwin believed traits were inherited through genes, while Lamarck believed traits were not inherited.
B) Lamarck believed species never change, while Darwin believed they do.
C) Darwin believed evolution happens through natural selection, while Lamarck believed it happens through use and disuse of traits.
D) Both Darwin and Lamarck believed that evolution is a sudden and random process.
Write your answer under the comment section
Questions: Biology
1.What is the primary mechanism driving evolution according to Charles Darwin?
a) Genetic drift
b) Natural selection
c) Gene flow
d) Mutation
2.Which of the following best defines evolution?
a) Change in an individual’s traits over its lifetime
b) Change in the genetic makeup of a population over generations
c) Random survival of organisms
d) A sudden increase in population size
3.What term describes the process where organisms better adapted to their environment tend to survive and reproduce?
a) Artificial selection
b) Survival of the fittest
c) Genetic equilibrium
d) Speciation
4.Which scientist co-proposed the theory of evolution by natural selection alongside Darwin?
a) Gregor Mendel
b) Alfred Russel Wallace
c) Thomas Huxley
d) Jean-Baptiste Lamarck
5.What is an example of a vestigial structure in humans?
a) Appendix
b) Lungs
c) Heart
d) Eyes
6.What type of evolution occurs when two species evolve in response to changes in each other?
a) Divergent evolution
b) Convergent evolution
c) Coevolution
d) Parallel evolution
7.Which of the following is NOT a source of genetic variation?
a) Mutation
b) Meiosis
c) Uniform weather conditions
d) Gene recombination
8.What is the term for the formation of a new species?
a) Adaptation
b) Speciation
c) Genetic drift
d) Hybridization
9.Which type of selection favors individuals at one extreme of a trait’s range?
a) Stabilizing selection
b) Directional selection
c) Disruptive selection
d) Random selection
10What is an example of convergent evolution?
a) Wings of birds and bats
b) Beaks of Darwin’s finches
c) Human and chimpanzee hands
d) Legs of horses and zebras
Answers:
1.b
2.b
3.b
4.b
5.a
6.c
7.c
8.b
9.b
10.a
1.What is the primary mechanism driving evolution according to Charles Darwin?
a) Genetic drift
b) Natural selection
c) Gene flow
d) Mutation
2.Which of the following best defines evolution?
a) Change in an individual’s traits over its lifetime
b) Change in the genetic makeup of a population over generations
c) Random survival of organisms
d) A sudden increase in population size
3.What term describes the process where organisms better adapted to their environment tend to survive and reproduce?
a) Artificial selection
b) Survival of the fittest
c) Genetic equilibrium
d) Speciation
4.Which scientist co-proposed the theory of evolution by natural selection alongside Darwin?
a) Gregor Mendel
b) Alfred Russel Wallace
c) Thomas Huxley
d) Jean-Baptiste Lamarck
5.What is an example of a vestigial structure in humans?
a) Appendix
b) Lungs
c) Heart
d) Eyes
6.What type of evolution occurs when two species evolve in response to changes in each other?
a) Divergent evolution
b) Convergent evolution
c) Coevolution
d) Parallel evolution
7.Which of the following is NOT a source of genetic variation?
a) Mutation
b) Meiosis
c) Uniform weather conditions
d) Gene recombination
8.What is the term for the formation of a new species?
a) Adaptation
b) Speciation
c) Genetic drift
d) Hybridization
9.Which type of selection favors individuals at one extreme of a trait’s range?
a) Stabilizing selection
b) Directional selection
c) Disruptive selection
d) Random selection
10What is an example of convergent evolution?
a) Wings of birds and bats
b) Beaks of Darwin’s finches
c) Human and chimpanzee hands
d) Legs of horses and zebras
Answers:
1.b
2.b
3.b
4.b
5.a
6.c
7.c
8.b
9.b
10.a
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Which one is the largest number?
Anonymous Quiz
37%
8⁸
22%
16⁴
12%
2⁴ + 2⁴ + 2⁴ + 2⁴
29%
4⁴ + 4⁴ + 4⁴ + 4⁴
Which of the following quantum number is known as orbital orientation quantum number?
Anonymous Quiz
47%
Magnetic quantum number
27%
Angular quantum number
18%
Spin quantum number
8%
Principal quantum number
Which of the following element can form both a cation and anion?
Anonymous Quiz
7%
Magnesium
10%
Sodium
73%
Hydrogen
10%
Oxygen
Which one of the following is not general properties of ionic compounds?
Anonymous Quiz
14%
They don't contain molecules.
17%
They have relatively high melting and boiling points.
19%
They can conduct electric currents when molten or in aqueous solution.
50%
They are soluble in non- polar solvents.
Which of the following element can not form ionic compound with oxygen?
Anonymous Quiz
9%
Magnesium
11%
Calcium
31%
Rubidium
50%
Sulphur
When hydrogen and chlorine atoms are companied to form covalent bond, how many lone - pairs and bonding - pairs are there in HCl compound respectively?
Anonymous Quiz
25%
1 and 3
58%
3 and 1
13%
1 and 2
4%
2 and 1
🥰3
Which one of the following molecule can form triple bond?
Anonymous Quiz
10%
Hydrogen molecule
7%
Chlorine molecule
74%
Nitrogen molecule
10%
Fluorine molecule
Which one of the following is the longest period in the periodic table?
Anonymous Quiz
8%
Period 3
15%
Period 5
44%
Period 7
34%
Period 6
What is the molecular geometry of O₃ ?
Anonymous Quiz
34%
Trigonal planar
41%
Bent
19%
Trigonal pyramidal
6%
Tetrahedral
What is the molecular shape of BrF₄⁻ ?
Anonymous Quiz
6%
Bent
25%
See saw
58%
Square planar
11%
Octahedral
How many sigma and pi bonds are there in ethylene ( C₂H₄) ?
Anonymous Quiz
39%
5 sigma and 1 pi
28%
4 sigma and 2 pi
17%
5 sigma and 2 pi
16%
6 sigma and 1 pi
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G-12 Unit 2 Exercise .pdf
94.9 KB
Maths grade 11 and 12 unit 2 exercise
Consider the following chemical equation:
PCl₅ + H₂O ------>H₃PO₄ + HCl.
Then what is the coefficient of HCl after balancing of chemical equation?
PCl₅ + H₂O ------>H₃PO₄ + HCl.
Then what is the coefficient of HCl after balancing of chemical equation?
Anonymous Quiz
14%
4
20%
1
58%
5
8%
3
For endothermic reactions, change in enthalpy (∆H) is:
Anonymous Quiz
80%
Positive
12%
Negative
6%
Zero
2%
Not determined
How many moles of CaO are needed to react with excess water to produce 370 g of calcium hydroxide?
Anonymous Quiz
10%
4 mol
43%
5 mol
38%
12.4 mol
10%
3.033 mol