Question 1

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

Accepted Answer

A property that arises only when individual components interact at higher levels of organization.

Question 2

Which of the following is NOT a characteristic shared by all living things?

Accepted Answer

Ability to photosynthesize

Question 3

A hummingbird’s ability to hover and feed on nectar is an example of which unifying theme in biology?

Accepted Answer

Structure and function

Question 4

Which of the following statements about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Both prokaryotic and eukaryotic cells have DNA, but only eukaryotic cells store DNA in a nucleus.

Question 5

Which process best illustrates the theme of 'information' in biology?

Accepted Answer

The transmission of DNA from parent to offspring during reproduction

Question 6

Which of the following best describes negative feedback in biological systems?

Accepted Answer

A process in which the end product inhibits the process that produced it.

Question 7

Which of the following is an example of chemical cycling in an ecosystem?

Accepted Answer

Decomposers breaking down dead organisms and returning nutrients to the soil

Question 8

Which statement about gene expression is correct?

Accepted Answer

Gene expression is the process by which information in a gene is used to synthesize a functional protein or RNA.

Question 9

Which of the following best explains why all living organisms share the same genetic code?

Accepted Answer

The universality of the genetic code suggests a common evolutionary ancestor.

Question 10

A scientist is studying how increased atmospheric $$CO_2$$ affects plant growth and ecosystem dynamics. Which approach is she using?

Accepted Answer

Systems biology

Question 11

Which of the following is a correct sequence in the hierarchy of biological organization, from smallest to largest?

Accepted Answer

Organelle → Cell → Tissue → Organ → Organism

Question 12

Which of the following is an example of positive feedback?

Accepted Answer

Platelet accumulation and clot formation after injury

Question 13

Which of the following best describes the flow of energy in an ecosystem?

Accepted Answer

Energy enters as sunlight, is converted to chemical energy, and eventually lost as heat.

Question 14

Which of the following is a real-world example of the correlation between structure and function?

Accepted Answer

The broad, flat shape of a leaf maximizing sunlight capture for photosynthesis

Question 15

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organisms, returning chemicals to the soil.

Question 16

Which of the following is an example of evolutionary adaptation?

Accepted Answer

The development of antibiotic resistance in bacteria over generations

Question 17

Which of the following best describes the relationship between DNA, genes, and proteins?

Accepted Answer

DNA contains genes, which encode the instructions for making proteins.

Question 18

Which of the following is a function of bioinformatics in modern biology?

Accepted Answer

To store, organize, and analyze large volumes of biological data

Question 19

Which of the following is an example of an organism interacting with its physical environment?

Accepted Answer

A plant absorbing sunlight and carbon dioxide for photosynthesis

Question 20

Which of the following best explains why climate change can lead to species extinction?

Accepted Answer

Climate change can alter habitats faster than some species can adapt or migrate, leading to population declines and extinction.

Unifying Themes in Biology: The Study of Life

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