Question 1

Which of the following best explains why the Miller-Urey experiment was significant in the study of the origin of life?

Accepted Answer

It demonstrated that organic molecules could form spontaneously under early Earth-like conditions.

Question 2

Which of the following is NOT a characteristic of life as defined in biology?

Accepted Answer

Photosynthesis

Question 3

The earliest fossil evidence of life on Earth dates back to approximately how many billion years ago?

Accepted Answer

$$3.5$$

Question 4

Which of the following statements about prokaryotes is TRUE?

Accepted Answer

They lack a membrane-bound nucleus.

Question 5

Which process is thought to have contributed most to the rapid evolution and genetic diversity of prokaryotes?

Accepted Answer

Rapid reproduction and high mutation rates

Question 6

Which of the following best describes a protocell?

Accepted Answer

A droplet with a membrane-like structure that can maintain an internal environment different from its surroundings

Question 7

What is the main reason cyanobacteria are considered crucial in the history of life on Earth?

Accepted Answer

They released oxygen into the atmosphere through photosynthesis.

Question 8

Which of the following is a plausible explanation for the origin of organic molecules on early Earth, based on experimental evidence?

Accepted Answer

Abiotic synthesis in localized reducing environments such as volcanic eruptions or deep-sea vents

Question 9

Which of the following is a function of ribozymes that supports the RNA world hypothesis?

Accepted Answer

They can catalyze their own replication.

Question 10

A scientist discovers a rock formation with layered structures formed by ancient prokaryotes. What are these structures most likely to be?

Accepted Answer

Stromatolites

Question 11

Which of the following best explains why double-stranded DNA eventually replaced RNA as the primary genetic material in cells?

Accepted Answer

DNA is more stable and can be replicated more accurately than RNA.

Question 12

Which of the following is NOT a step in the hypothesized process leading to the origin of life on Earth?

Accepted Answer

Formation of multicellular organisms before protocells

Question 13

Which of the following best describes the role of montmorillonite clay in the formation of protocells?

Accepted Answer

It increases the rate of vesicle formation by concentrating molecules on its surface.

Question 14

Which of the following statements about the early Earth's atmosphere is supported by experimental evidence?

Accepted Answer

Organic molecules can form in both reducing and neutral atmospheres.

Question 15

Which of the following is a real-world example of how prokaryotes have adapted to survive in extreme environments?

Accepted Answer

Some bacteria form endospores to withstand harsh conditions such as high heat or desiccation.

Question 16

Which of the following is a key difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack a nuclear membrane.

Question 17

A researcher simulates early Earth conditions by heating a mixture of water, methane, ammonia, and hydrogen, then applying electrical sparks. Which result would best support the hypothesis that life could have originated under such conditions?

Accepted Answer

Detection of amino acids and other organic molecules in the mixture

Question 18

Which of the following best explains why prokaryotes were able to diversify into so many different environments on early Earth?

Accepted Answer

Their small size, rapid reproduction, and high mutation rates allowed for rapid adaptation.

Question 19

Which of the following is the correct chronological order of major events in the history of life on Earth?

Accepted Answer

Formation of Earth → chemical signatures of life → first prokaryotes → first eukaryotes

Question 20

Which of the following best describes the process by which macromolecules could have formed on early Earth?

Accepted Answer

Monomers such as amino acids and nucleotides polymerized on hot sand, clay, or rock surfaces without enzymes.

Early Life and the Diversification of Prokaryotes: Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드