Question 1

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

Accepted Answer

A property that arises only when the parts of a system interact in a specific way, not present in the individual parts alone.

Question 2

Which of the following statements about the cell theory is correct?

Accepted Answer

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

Question 3

A scientist is studying the effect of a new fertilizer on plant growth. She sets up two groups: one receives the fertilizer, and the other does not. What is the independent variable in this experiment?

Accepted Answer

The presence or absence of the fertilizer.

Question 4

Which domain includes organisms that are mostly single-celled and classified into several groups, some of which are less closely related to each other than to plants, animals, or fungi?

Accepted Answer

Domain Eukarya

Question 5

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

Accepted Answer

High blood glucose stimulates insulin secretion, which lowers blood glucose, reducing further insulin secretion.

Question 6

Which of the following best illustrates the correlation between structure and function in biology?

Accepted Answer

The shape of a bird's beak determines the type of food it can eat.

Question 7

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

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 8

A population of finches on the Galapagos Islands evolves over time so that some individuals have larger beaks suited for eating seeds, while others have smaller beaks for eating insects. This is an example of:

Accepted Answer

Descent with modification through natural selection.

Question 9

Which of the following is NOT one of the five unifying themes of biology?

Accepted Answer

Mutation

Question 10

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-enclosed organelles, while prokaryotic cells do not.

Question 11

Which of the following is a real-world example of how humans have affected the cycling of matter and energy in ecosystems?

Accepted Answer

Increasing the burning of fossil fuels, leading to higher atmospheric $CO_2$ and climate change.

Question 12

Which of the following is a property shared by all living organisms?

Accepted Answer

Order, reproduction, response to environment, energy processing, growth and development.

Question 13

Which of the following best explains why DNA is considered the universal genetic language?

Accepted Answer

All organisms use DNA to encode information for building proteins.

Question 14

A scientist observes that a lamp does not work. She hypothesizes that the bulb is burnt out. Which step of the scientific process does this represent?

Accepted Answer

Forming a hypothesis.

Question 15

Which of the following is a key difference between a scientific theory and a hypothesis?

Accepted Answer

A theory is broader in scope and supported by a large body of evidence.

Question 16

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

Accepted Answer

Blood clotting, where the activation of platelets accelerates the process.

Question 17

Which of the following best describes the process of energy flow and chemical cycling in an ecosystem?

Accepted Answer

Energy flows through the ecosystem, entering as light and exiting as heat, while chemicals cycle within the ecosystem.

Question 18

Which of the following is an example of how structure gives clues to function in biology?

Accepted Answer

The streamlined shape of fish allows efficient movement through water.

Question 19

Which of the following is a reason why diverse viewpoints are valuable in science?

Accepted Answer

They lead to more robust, valuable, and productive scientific interchange.

Chapter 1: Evolution, the Themes of Biology, and Scientific Inquiry

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