Question 1

Which of the following best describes the core theme of biology, as highlighted in the study materials?

Accepted Answer

Evolution accounts for the unity and diversity of life.

Question 2

A scientist observes that a certain plant species has developed thicker leaves in a dry environment over many generations. Which biological concept does this scenario best illustrate?

Accepted Answer

Descent with modification through natural selection.

Question 3

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

Accepted Answer

The release of insulin in response to high blood glucose, lowering glucose levels.

Question 4

Which of the following best explains why all living organisms share certain similarities, such as the use of DNA as genetic material?

Accepted Answer

They all evolved from a common ancestor.

Question 5

A population of insects is exposed to a new pesticide. Over several generations, most of the population becomes resistant to the pesticide. Which process is responsible for this change?

Accepted Answer

Natural selection favoring individuals with resistance genes.

Question 6

Which of the following is NOT a characteristic of scientific inquiry?

Accepted Answer

Relying solely on untestable explanations.

Question 7

Which of the following best describes positive feedback in a biological context?

Accepted Answer

A response that reinforces the initial stimulus, increasing the response.

Question 8

Which of the following is a correct example of hierarchical organization in biology, from smallest to largest?

Accepted Answer

Molecule → Cell → Tissue → Organ → Organism

Question 9

A researcher is studying the effect of increased atmospheric $CO_2$ on plant growth. Which level of biological organization is primarily being investigated?

Accepted Answer

Ecosystem

Question 10

Which of the following statements about the three domains of life is correct?

Accepted Answer

Bacteria and Archaea are both prokaryotes, while Eukarya includes all eukaryotes.

Question 11

Which of the following best illustrates the concept of descent with modification?

Accepted Answer

The forelimbs of whales, bats, and humans have different functions but similar bone structures.

Question 12

A scientist proposes that if a certain fertilizer is applied to tomato plants, then the plants will grow taller. This is an example of:

Accepted Answer

A testable hypothesis using deductive reasoning.

Question 13

Which of the following is a real-world example of how climate change can affect biological systems?

Accepted Answer

Increased $CO_2$ levels lead to global warming, causing polar bear populations to decline due to habitat loss.

Question 14

Which of the following best describes the process of scientific inquiry?

Accepted Answer

Making observations, forming hypotheses, and testing them through experiments.

Question 15

Which of the following is an example of a mutually beneficial interaction between organisms in an ecosystem?

Accepted Answer

Bees pollinating flowers while obtaining nectar.

Question 16

Which of the following best explains why scientific hypotheses must be testable?

Accepted Answer

So that predictions can be evaluated through observation or experimentation.

Question 17

A population of finches on the Galápagos Islands develops different beak shapes over time due to varying food sources. This is an example of:

Accepted Answer

Adaptive radiation resulting from natural selection.

Question 18

Which of the following is a correct statement about the relationship between structure and function in biology?

Accepted Answer

The structure of a biological component often determines its function.

Question 19

Which of the following best describes the role of feedback regulation in biological systems?

Accepted Answer

It allows biological processes to self-regulate by adjusting responses to stimuli.

Question 20

Which of the following is an example of inductive reasoning in scientific inquiry?

Accepted Answer

After observing that all swans seen so far are white, a scientist concludes that all swans are white.

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

Study Guide - Practice Questions

Study Guide - Flashcards