Question 1

Which of the following best describes an emergent property in biological systems?

Accepted Answer

A property that arises from the arrangement and interaction of parts within a system, such as consciousness in the human brain.

Question 2

According to the cell theory, which of the following statements is correct?

Accepted Answer

Cells are the smallest unit of organization that can perform all activities required for life.

Question 3

Which of the following is a key difference between prokaryotic and eukaryotic cells as shown in the images?

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells have a nucleoid region.

Question 4

In the context of the central dogma of molecular biology, which process is responsible for converting DNA information into RNA?

Accepted Answer

Transcription

Question 5

A mutation changes a single nucleotide in a gene. Which of the following is a possible consequence of this mutation?

Accepted Answer

The sequence of amino acids in the resulting protein may change, potentially altering its function.

Question 6

Which of the following best explains why viruses are generally not considered living organisms?

Accepted Answer

They do not have a cellular structure and cannot carry out metabolism independently.

Question 7

Which of the following is an example of negative feedback in biological systems?

Accepted Answer

High blood glucose stimulates insulin secretion, which lowers blood glucose and reduces further insulin secretion.

Question 8

The increase in atmospheric $$CO_2$$ levels shown in the Mauna Loa Observatory graph is most likely to result in which of the following?

Accepted Answer

An increase in the frequency of extreme weather events and shifts in species distributions.

Question 9

Which of the following best describes the process of natural selection as observed by Darwin in the Galápagos finches?

Accepted Answer

Individuals with traits best suited to their environment are more likely to survive and reproduce, passing those traits to the next generation.

Question 10

Which of the following is an example of a homologous structure?

Accepted Answer

The forelimbs of a human, a dog, a bird, and a whale.

Question 11

Which of the following best explains why the average human birth weight is maintained by stabilizing selection?

Accepted Answer

Both very low and very high birth weights have higher mortality rates, so intermediate weights are favored.

Question 12

Which of the following scenarios best illustrates disruptive selection?

Accepted Answer

A population of birds where both very small and very large beaks are favored, but medium-sized beaks are selected against.

Question 13

Which of the following statements about the flow of energy and cycling of matter in ecosystems is correct?

Accepted Answer

Energy flows through an ecosystem, entering as light and exiting as heat, while matter cycles within the ecosystem.

Question 14

Which of the following best describes the relationship between structure and function in biology?

Accepted Answer

The structure of a biological component gives clues about its function, and knowing the function provides insight into its structure.

Question 15

Which of the following is a correct statement about gene expression?

Accepted Answer

Gene expression is the process by which information from a gene is used to build a protein.

Question 16

Which of the following is an example of positive feedback in biological systems?

Accepted Answer

The secretion of oxytocin during childbirth, which increases uterine contractions and stimulates more oxytocin release.

Question 17

Which of the following best explains why the fossil record is important evidence for evolution?

Accepted Answer

It provides evidence of the extinction of species, the origin of new groups, and changes within groups over time.

Question 18

Which of the following is a correct statement about mutations and natural selection?

Accepted Answer

Mutations are random changes in DNA, and natural selection acts upon these mutations.

Question 19

Which of the following best describes the unity and diversity of life as explained by evolution?

Accepted Answer

Organisms share common features due to descent from a common ancestor, but also show diversity due to adaptation and modification over time.

Unifying Themes and Foundations of General Biology

스터디 가이드 - 연습 문제