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 within a system.

Question 2

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

Accepted Answer

Ability to reproduce sexually

Question 3

A scientist wants to test the effect of a new drug on blood pressure. She divides 1000 subjects into two groups: Group A receives the drug, and Group B does not. What is the independent variable in this experiment?

Accepted Answer

The group assignment (drug vs. no drug)

Question 4

Which of the following best explains why Charles Darwin's theory of evolution is considered a unifying theme in biology?

Accepted Answer

It provides a framework for understanding the diversity and unity of life.

Question 5

A researcher observes that bacteria exposed to methicillin develop resistance over time. Which biological concept does this scenario best illustrate?

Accepted Answer

Natural selection

Question 6

Which of the following is the best example of a hypothesis in a scientific investigation?

Accepted Answer

If vitamin D intake increases, then bone density will improve in adults.

Question 7

In a controlled experiment, why is it important to have a control group?

Accepted Answer

To compare the effects of the independent variable against a baseline.

Question 8

Which of the following statements about scientific theories is most accurate?

Accepted Answer

A theory is a well-supported explanation based on a body of evidence.

Question 9

A student reads a newspaper article claiming that a new supplement increases memory. Which step should the student take to evaluate the scientific validity of this claim?

Accepted Answer

Look for peer-reviewed studies supporting the claim.

Question 10

Which equation correctly represents the relationship between variables in a controlled experiment?

Accepted Answer

$$Y = f(X)$$

Question 11

A population of finches on an island shows variation in beak size. During a drought, only finches with larger beaks survive. Which process is illustrated?

Accepted Answer

Natural selection

Question 12

Which of the following is an example of a scientific law?

Accepted Answer

The law of conservation of energy

Question 13

A scientist wants to test whether a new antibiotic is effective against a bacterial infection. Which of the following would be the best experimental design?

Accepted Answer

Randomly assign patients to receive either the antibiotic or a placebo.

Question 14

Which of the following best describes the difference between a hypothesis and a theory?

Accepted Answer

A hypothesis is a testable prediction, while a theory is a well-supported explanation.

Question 15

Which of the following is a critical flaw in an experiment where the control group is not matched for age and health status with the experimental group?

Accepted Answer

The results may be biased due to confounding variables.

Question 16

Which of the following best illustrates the concept of homeostasis?

Accepted Answer

A human maintaining a stable internal body temperature

Question 17

Which of the following is an example of an emergent property at the cellular level?

Accepted Answer

The coordinated contraction of heart muscle cells to pump blood

Question 18

Which of the following is a valid scientific hypothesis?

Accepted Answer

If plants are exposed to more sunlight, then their growth rate will increase.

Question 19

Which of the following best describes the process of peer review in science?

Accepted Answer

Other experts evaluate the research before it is published.

Question 20

A scientist collects data on the effect of temperature on enzyme activity. She plots the data and finds a bell-shaped curve. Which equation best describes the relationship?

Accepted Answer

$$y = a e$$^{-\frac{(x-b)^2}$${2c^2$}}$$

Biology Concepts & Connections: Chapter 1 Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard