Q: Which equation best represents the process of photosynthesis?

$$6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 1

Which of the following best describes the process of homeostasis in living organisms?

Accepted Answer

The process by which an organism maintains internal constancy despite external changes.

Question 2

A scientist observes that certain flowers near a nuclear plant have defects. She hypothesizes that radiation is the cause. Which attribute of science is she demonstrating by designing an experiment to test this hypothesis?

Accepted Answer

Testability

Question 3

Which of the following is NOT one of the seven characteristics of life?

Accepted Answer

Question 4

Which equation best represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6O_2$$

Question 5

A population of rabbits in a field grows rapidly at first, then levels off as resources become limited. Which type of growth curve does this describe?

Accepted Answer

Logistic growth (S-shaped curve)

Question 6

Why does increasing atmospheric $$CO_2$$ lead to ocean acidification?

Accepted Answer

Because $$CO_2$$ dissolves in seawater, forming carbonic acid that lowers pH.

Question 7

Which of the following is a correct statement about the scientific method?

Accepted Answer

It involves making observations, forming hypotheses, conducting experiments, and drawing conclusions.

Question 8

Which of the following is a primary difference between fossil fuels and biofuels?

Accepted Answer

Fossil fuels are derived from ancient primary producers, while biofuels are made from modern primary producers.

Question 9

Which of the following best explains why more greenhouse gases in the atmosphere lead to higher global temperatures?

Accepted Answer

Greenhouse gases trap more heat in the atmosphere, preventing it from escaping into space.

Question 10

A scientist claims that a new biofuel is more sustainable than fossil fuels. Which of the following would be the best evidence to support this claim?

Accepted Answer

The biofuel is produced from rapidly renewable plant sources and results in lower net carbon emissions.

Question 11

Which of the following is an example of mutualism in a community?

Accepted Answer

A bee pollinating a flower while collecting nectar.

Question 12

If the majority of carbon will stay in the atmosphere for at least 60 years even if emissions are drastically reduced, what does this imply for climate change mitigation?

Accepted Answer

Immediate reductions in emissions are necessary, but effects will be delayed due to carbon's long atmospheric lifetime.

Question 13

Which of the following best describes the role of producers in an ecosystem's food web?

Accepted Answer

They convert energy from sunlight into chemical energy through photosynthesis.

Question 14

Which of the following is a major barrier to the widespread adoption of decentralized sustainable energy sources?

Accepted Answer

The need to transmit electricity over large areas from where it is made to where it is used.

Question 15

Which of the following is a correct description of the Calvin cycle in photosynthesis?

Accepted Answer

It uses energy from light reactions to convert carbon dioxide into sugar.

Question 16

Which of the following is a plausible consequence of ocean acidification for marine organisms?

Accepted Answer

Dissolving of calcium carbonate parts, such as shells and coral skeletons.

Question 17

Which of the following best describes the difference between a food web and a food chain?

Accepted Answer

A food web shows multiple interconnected food chains, reflecting greater complexity.

Question 18

Which of the following is a common misconception about Earth's response to increased atmospheric $$CO_2$$?

Accepted Answer

"The Earth has experienced high $$CO_2$$ concentrations before, so there is no problem now."

Question 19

Which of the following best defines carrying capacity in an ecosystem?

Accepted Answer

The maximum population size that can survive in the environment given limiting factors.

Question 20

Which of the following is a real-world example of how evolution helps organisms survive?

Accepted Answer

Seahorses that blend in with their environment are more likely to survive and reproduce.

General Biology: Life, Scientific Method, Ecology, and Global Climate Change

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