Question 1

Which of the following best describes the correct order of the biological hierarchy from smallest to largest?

Accepted Answer

Organelle → Cell → Tissue → Organ → Organ System → Organism → Population → Community → Ecosystem → Biosphere

Question 2

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

Accepted Answer

Quorum sensing in bacteria leading to coordinated infection

Question 3

A scientist hypothesizes that flower color affects butterfly visitation rates. Which of the following is the correct null hypothesis?

Accepted Answer

Flower color does not affect the number of visits to flowers by butterflies.

Question 4

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

Accepted Answer

Ability to photosynthesize

Question 5

A mutation in the DNA of a single cell causes sickle cell anemia. Which of the following best explains how this molecular change can affect higher levels of biological organization?

Accepted Answer

The mutation alters the shape of red blood cells, which impairs oxygen transport, leading to organ damage and affecting the health of the entire organism and population.

Question 6

Which of the following statements about viruses is most accurate based on the characteristics of life?

Accepted Answer

Viruses are not considered alive because they cannot reproduce or metabolize on their own.

Question 7

Which level of biological organization is defined as all the populations of different species interacting together within an area?

Accepted Answer

Community

Question 8

Which of the following is a requirement for a scientific hypothesis?

Accepted Answer

It must be specific, testable, and falsifiable.

Question 9

Bird flight is considered an emergent property. At which level of the biological hierarchy does this property first appear?

Accepted Answer

Organism

Question 10

Which of the following best illustrates the concept of energy flow and chemical cycling in an ecosystem?

Accepted Answer

Plants convert sunlight to chemical energy, which is used by organisms, and decomposers return nutrients to the soil.

Question 11

Which of the following is the smallest unit of life that can carry out all the functions necessary for life?

Accepted Answer

Cell

Question 12

Which of the following is an example of a controlled experiment?

Accepted Answer

Testing the effect of fertilizer on plant growth by keeping all other variables constant except the amount of fertilizer applied.

Question 13

Which of the following is NOT an emergent property?

Accepted Answer

The atomic mass of carbon

Question 14

Which of the following best describes the difference between a null hypothesis and an alternative hypothesis?

Accepted Answer

A null hypothesis states there is no relationship between variables, while an alternative hypothesis states there is a relationship.

Question 15

Which of the following scenarios best demonstrates the concept of homeostasis?

Accepted Answer

A human sweating to cool down when body temperature rises.

Question 16

Which of the following is an example of adaptation at the population level?

Accepted Answer

A population of insects developing resistance to a pesticide over several generations.

Question 17

Which of the following is NOT a step in the scientific method?

Accepted Answer

Accepting a hypothesis without testing

Question 18

Which of the following best explains why a grocery-store chicken egg is not considered alive?

Accepted Answer

It does not exhibit all seven characteristics of life, such as metabolism and growth.

Question 19

Which of the following best illustrates the concept of emergent properties?

Accepted Answer

A heart can pump blood, but individual heart cells cannot.

Question 20

Which of the following is an example of how human activity can impact the biological hierarchy?

Accepted Answer

Pollution causing toxic algae blooms that threaten drinking water for millions.

Introduction to Biology: Hierarchy, Characteristics of Life, and Scientific Inquiry

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