🎯ማትሪክ ላይ የማይሸሩ 10 የBIOLOGY ጥያቄዎች about evolution ከነመልሶቹ እና ማብራሪያ ጋር !
1. Suppose a fossil initially contains 100,000 atoms of a certain radioactive element whose half-life is 10,000 years, after how many years would the number of the atoms be12500?
A, 10,000 years B. 30,000 years
C, 20,000 years D, 40,000 years
2, How many years have passed since Darwin’s book on the theory of evolution was published?
A, About 50 years
B, About 120 years
C, About 160 years D. About 100 years
3, In his theory of evolution, the cause of which of the following of concepts was MISSING in Darwin’s explanation?
A, Over reproduction
B, Hereditary variation
C, Struggle for survival D. Survival of the fittest
4, Which of the following characteristics can show the evolutionary relationships among organisms?
A, Structures having similar functions
B, Presence of analogous structures
C. Presence of homologous structure
D, Structures of having different structures
5, Which of the following evolutionary theory believes there is no beginning and ending of life?
A, Cosmozoan theory
B. eternity of life
C. spontaneous generation
D. special creationism
6, In the process of the evolution of life on earth , which of the following processes evolves last?
A, Photosynthesis
B. aerobic respiration
C. chemosynthesis
D. photo auto tropism
7, In which of geological period does the fossil record show more diverse and relatively higher forms of organisms?
A, Devonian
B. Permian
C. Jurassic
D. Cretaceous
8, If a radioactive substance that weighs one kilogram has a half-life of 100 years. What would be the percentage of the substance left after 400 years?
A,50
B. 25
C. 12.5
D. 6.25
9, According to Lamarck’s theory of evolution, what is the mechanism by which evolving organisms acquire new structures?
A, Mutation
B. Hereditary variation
C. use and dis use of body parts
D. recombination of ancestral genes
10, The half life of carbon-14 is about 7680. If a fossil is 1970 years old, about what percent of its original carbon-14 is still present in the fossil?
A, 50%
B. 12.5%
C. 6.25%
D. 25%
Answer
1. Answer: C. 20,000 years
• Explanation: After 10,000 years (1 half-life), it would be 50,000 atoms; after 20,000 years (2 half-lives), it would be 25,000 atoms; and after 30,000 years (3 half-lives), it would be 12,500 atoms.
2. Answer: C. About 160 years
• Explanation: Darwin's "On the Origin of Species" was published in 1859.
3. Answer: B. Hereditary variation
• Explanation: While Darwin discussed natural selection and survival, he did not have a clear understanding of the mechanisms of heredity (which were later explained by genetics).
4. Answer: C. Presence of homologous structure
• Explanation: Homologous structures indicate common ancestry, while analogous structures do not.
5. Answer: B. eternity of life
• Explanation: The eternity of life concept suggests that life has no beginning or end.
6. Answer: B. aerobic respiration
• Explanation: Aerobic respiration evolved after photosynthesis, as oxygen produced by photosynthetic organisms allowed for aerobic respiration to occur.
7. Answer: C. Jurassic
• Explanation: The Jurassic period is known for its diversity of dinosaurs and other life forms.
8. Answer: D. 6.25%
• Explanation: After 400 years (4 half-lives), the amount left would be 1/2⁴ = 1/16 = 6.25% .
9. Answer: C. use and disuse of body parts
• Explanation: Lamarck proposed that organisms could develop new traits based on use or disuse of certain body parts.
10 . Answer: A. 50%
1. Suppose a fossil initially contains 100,000 atoms of a certain radioactive element whose half-life is 10,000 years, after how many years would the number of the atoms be12500?
A, 10,000 years B. 30,000 years
C, 20,000 years D, 40,000 years
2, How many years have passed since Darwin’s book on the theory of evolution was published?
A, About 50 years
B, About 120 years
C, About 160 years D. About 100 years
3, In his theory of evolution, the cause of which of the following of concepts was MISSING in Darwin’s explanation?
A, Over reproduction
B, Hereditary variation
C, Struggle for survival D. Survival of the fittest
4, Which of the following characteristics can show the evolutionary relationships among organisms?
A, Structures having similar functions
B, Presence of analogous structures
C. Presence of homologous structure
D, Structures of having different structures
5, Which of the following evolutionary theory believes there is no beginning and ending of life?
A, Cosmozoan theory
B. eternity of life
C. spontaneous generation
D. special creationism
6, In the process of the evolution of life on earth , which of the following processes evolves last?
A, Photosynthesis
B. aerobic respiration
C. chemosynthesis
D. photo auto tropism
7, In which of geological period does the fossil record show more diverse and relatively higher forms of organisms?
A, Devonian
B. Permian
C. Jurassic
D. Cretaceous
8, If a radioactive substance that weighs one kilogram has a half-life of 100 years. What would be the percentage of the substance left after 400 years?
A,50
B. 25
C. 12.5
D. 6.25
9, According to Lamarck’s theory of evolution, what is the mechanism by which evolving organisms acquire new structures?
A, Mutation
B. Hereditary variation
C. use and dis use of body parts
D. recombination of ancestral genes
10, The half life of carbon-14 is about 7680. If a fossil is 1970 years old, about what percent of its original carbon-14 is still present in the fossil?
A, 50%
B. 12.5%
C. 6.25%
D. 25%
Answer
1. Answer: C. 20,000 years
• Explanation: After 10,000 years (1 half-life), it would be 50,000 atoms; after 20,000 years (2 half-lives), it would be 25,000 atoms; and after 30,000 years (3 half-lives), it would be 12,500 atoms.
2. Answer: C. About 160 years
• Explanation: Darwin's "On the Origin of Species" was published in 1859.
3. Answer: B. Hereditary variation
• Explanation: While Darwin discussed natural selection and survival, he did not have a clear understanding of the mechanisms of heredity (which were later explained by genetics).
4. Answer: C. Presence of homologous structure
• Explanation: Homologous structures indicate common ancestry, while analogous structures do not.
5. Answer: B. eternity of life
• Explanation: The eternity of life concept suggests that life has no beginning or end.
6. Answer: B. aerobic respiration
• Explanation: Aerobic respiration evolved after photosynthesis, as oxygen produced by photosynthetic organisms allowed for aerobic respiration to occur.
7. Answer: C. Jurassic
• Explanation: The Jurassic period is known for its diversity of dinosaurs and other life forms.
8. Answer: D. 6.25%
• Explanation: After 400 years (4 half-lives), the amount left would be 1/2⁴ = 1/16 = 6.25% .
9. Answer: C. use and disuse of body parts
• Explanation: Lamarck proposed that organisms could develop new traits based on use or disuse of certain body parts.
10 . Answer: A. 50%