Question 1

Advantageous features that evolve over time and help an organism survive or reproduce are called ____________________.

Accepted Answer

The answer of Advantageous features that evolve over time and...

Question 2

All living organisms sense their environment and respond to it.

Accepted Answer

This is a basic characteristic of life and is observed in all living organisms.

Question 3

Through the process of ____________________, a group of organisms can develop new characteristics over time.

Accepted Answer

The answer of Through the process of ____________________, a group...

Question 4

A scientific hypothesis must be testable; if not, science cannot evaluate it.

Accepted Answer

A hypothesis must be testable in order for it to be considered scientific. This means that it must be able to be subjected to empirical observations or experiments in order to confirm or reject it. If a hypothesis is not testable, then it cannot be evaluated scientifically.

Question 5

The term autotroph can be interchanged with the term producer; both terms refer to organisms that obtain energy from the nonliving part of their environment.

Accepted Answer

This is a true statement. Autotrophs and producers both refer to organisms that are capable of producing their own food using energy from the nonliving part of their environment.

Question 6

Because the brain is constructed from nerve cells it is considered an organ.

Accepted Answer

The answer of Because the brain is constructed from nerve...

Question 7

DNA is an example of the molecular level of biological organization.

Accepted Answer

DNA is a molecule that is a fundamental building block of life and exists at the molecular level of biological organization.

Question 8

Some bacteria can sense direction using magnetic particles in their cells.

Accepted Answer

Some bacteria, such as magnetotactic bacteria, have the ability to sense direction using magnetic particles called magnetosomes that are present in their cells. These particles enable the bacteria to align themselves with the Earth's magnetic field and move in a particular direction, such as towards oxygen, light, or nutrients.

Question 9

The organs that constitute an organ system often work cooperatively to maintain homeostasis.

Accepted Answer

Organ systems are made up of organs that work together to perform specific functions and maintain homeostasis, which is the balance and stability of the body's internal environment. For example, the digestive system, consisting of organs like the stomach and intestines, works cooperatively to break down food, absorb nutrients, and eliminate waste products. The respiratory system, made up of organs such as the lungs and trachea, works cooperatively to exchange gases and maintain a proper balance of oxygen and carbon dioxide in the body.

Question 10

New cells are created when existing cells divide; immediately after division, every cell of every known living organism will contain DNA.

Accepted Answer

This is a basic principle of cell biology - new cells are created through the process of cell division, and every cell contains DNA, which contains the genetic instructions for the organism.

Question 11

The discovery that bacteria living in Mono Lake had replaced the phosphorus in certain biomolecules with ____________________ has challenged long-held assumptions about the chemical nature of life.

Accepted Answer

The answer of The discovery that bacteria living in Mono...

Question 12

Those organisms classified as consumers capture their energy directly from the sun.

Accepted Answer

Consumers are unable to capture their energy directly from the sun. They obtain their energy by consuming other organisms, such as plants or other consumers. The process of obtaining energy by consuming other organisms is known as heterotrophy.

Question 13

New medications undergo extensive human testing before receiving FDA approval; these tests represent an experiment and variations in the dosage given to participants represents the ____________________.

Accepted Answer

The answer of New medications undergo extensive human testing before...

Question 14

Polar bears are white, which makes them difficult to see as they stalk seals; their white fur is an example of an adaptation.

Accepted Answer

Yes, this statement is true. The white fur of polar bears helps them blend in with the Arctic snow and ice, making them less visible to their prey. This is an example of an adaptation, a trait that helps an organism survive and thrive in its environment.

Question 15

Once experimental data verifies a prediction the hypothesis is considered proven.

Accepted Answer

In science, hypotheses are never considered "proven," only supported or not supported by experimental data. Even if a hypothesis has been supported by multiple experiments, it is always subject to further testing and refinement. This is because science is based on the principle of falsifiability, which means that hypotheses can never be proven definitively but can be shown to be false if contradictory evidence arises.

Question 16

Hypotheses can be rejected or supported by experiments, or, in some instances, new observations.

Accepted Answer

This is a true statement. Experimental results or observations can either reject or support a hypothesis. If the results do not support the hypothesis, it may need to be revised or discarded. If the results do support the hypothesis, it may be further tested and confirmed through additional experiments and observations.

Question 17

A molecule is constructed when two or more atoms become bonded to one another.

Accepted Answer

This is a basic definition of a molecule, as it consists of two or more atoms held together by chemical bonds.

Question 18

Because the California sea lions that live along the Pacific coast freely migrate and regularly interbreed with one another biologists classify the group as a ____________________.

Accepted Answer

The answer of Because the California sea lions that live...

Question 19

A good hypothesis is easy to prove.

Accepted Answer

A good hypothesis should not be easy to prove, as it is meant to be tested and potentially falsified through experimentation or observation. A hypothesis that is easily proven is unlikely to be substantive or informative.

Question 20

The DNA of all living things is functionally organized into discrete segments called ____________________ that provide the directions for a specific genetic character.

Accepted Answer

The answer of The DNA of all living things is...

Quiz 1: The Nature of Science and the Characteristics of Life