Question 1 (5 points)

A scientist discovers a putative new life form and notes that the creature’s body is bilaterally symmetrical and consequently satisfies the criteria for defining life in which of the following categories?

Question 1 options:

evolution

growth and development

order

none, symmetry is not a basic characteristic of life

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Question 2 (5 points)

Which of the following lists correctly presents levels of organization from most complex to simplest?

Question 2 options:

ecosystem, community, organelle, cell

macromolecule, population, community, ecosystem

biosphere, community, organism, organ system

cell, organelle, atom, molecule

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Question 3 (5 points)

Which of the following statements must be *FALSE*?

Question 3 options:

Species A and B belong to different phylum, but the same domain

Species A and B belong to the same kingdom, but different phylum

Species A and B belong to different classes, but the same kingdom

Species A and B belong to the same class, but different phylum

Species A and B belong to the same kingdom, but different orders

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Question 4 (5 points)

What is the difference between prokaryotes and eukaryotes?

Question 4 options:

Eukaryotic cells have a nucleus; prokaryotic cells do not.

Prokaryotes belong to either the plant or the animal kingdom; eukaryotes belong to the bacteria kingdom.

Prokaryotic cells have a nucleus; eukaryotic cells do not.

Eurkarytoes belong to either the plant or the animal kingdom; prokarytoes belong to the fungi kingdom.

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Question 5 (5 points)

What is an integrated explanation of numerous hypotheses known as?

Question 5 options:

A scientific fact

A scientific law

A control group

A scientific theory

An educated guess

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Question 6 (5 points)

A scientist observes that when she opens the back door of her house to let her cat out, the songs of a certain species of bird abruptly change. She wants to follow up on her observations with an informal experiment. Which of the following is the best hypothesis for explaining the birds’ song changes?

Question 6 options:

The bird species switches from song to warning call whenever it sees a potential predator.

The bird species has a variety of songs that it sings, regardless of what is happening in its environment.

Why does the bird song change when I let the cat out?

The birds stop singing because they are afraid of the cat.

Question 7 (5 points)

A scientist wants to determine whether a new chemical she isolated can cure a certain disease. To test her hypothesis that the new chemical cures the disease more effectively than current treatments, she infects mice with the disease and gives them the new chemical. She then assesses how many mice were cured of the disease. What is missing from her experimental design?

Question 7 options:

She is not missing anything—her experimental design is adequate to test her hypothesis.

She is missing an experimental group of mice that received a half dose of the new chemical.

There are no variables in the experiment

She is missing a control group of mice that did not receive the new chemical.

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Question 8 (5 points)

The attempt to disprove a hypothesis is accomplished by which of the following tasks?

Question 8 options:

conducting experiments

making initial observations

proposing a theory

making an educated guess

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Question 9 (5 points)

Order the steps of the scientific method from the first step (1) to the last ().

Question 9 options:

State Hypothesis

Conduct Experiment

Report Results

Make Observation

Analyze Data

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Question 10 (5 points)

A nutritionist would like to test whether green coffee extract will impact weight loss in middle-aged women. Which of the following is the best hypothesis for the experiment?

Question 10 options:

Will green coffee extract help middle-aged women lose weight?

Middle-aged women taking green coffee extract pills daily will lose more weight than middle-aged women not taking green coffee extract pills.

Green coffee extract helps people lose weight

Women drinking coffee will most likely lose weight.

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Question 11 (5 points)

You have formulated a hypothesis: “Blueberries contain more vitamin C than raspberries.” To test your hypothesis you measure vitamin C levels in 20 blueberries and 20 raspberries from bushes that were grown in the same area under the same environmental conditions (temperature, rain, sunlight). What is the independent variable in this experiment?

Question 11 options:

The type of soil and the amount of rain

Vitamin C levels

The type of fruit

The amount of sun

The large sample size and repeated experiment

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Question 12 (5 points)

What is the atomic number of an element that has 33 protons and 30 neutrons?

Question 12 options:

33

30

63

Not enough information to tell

100

Question 13 (5 points)

Consider the following chemical equation which depicts the mechanism by which humans maintain an acid-base balance in the blood:

H+ + HCO3- ? H2CO3 ? H20 + CO2

What happens if the carbon dioxide on the right is not removed from the blood via the lungs?

Question 13 options:

The reaction will be driven toward the left, resulting in the blood becoming more acidic.

The reaction will be driven toward the left, resulting in the blood becoming more basic.

The reaction will be driven toward the center, and the pH of the blood will remain neutral.

The reaction will be driven towards the right, and the pH of the blood will become more acidic.

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Question 14 (5 points)

Which of the following statements correctly identifies and describes the type of covalent bond found between oxygen and hydrogen in water molecules?

Question 14 options:

polar covalent bonds because hydrogen is more electronegative than oxygen

hydrogen bonds because hydrogen is more electronegative than oxygen

polar covalent bonds because oxygen is more electronegative than hydrogen

hydrogen bonds because oxygen is more electronegative than hydrogen

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Question 15 (5 points)

What type of chemical bond is responsible for the 3 dimensional structure of nucleic acids and proteins?

Question 15 options:

covalent bonds

ionic bonds

hydrogen bonds

non-polar covalent bonds

Question 16 (5 points)

Which type of chemical bond connect amino acids together?

Question 16 options:

phosphodiester

hydrogen

peptide

ionic

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Question 17 (5 points)

Neon has an atomic number of 10 and an atomic mass of approximately 20. How many neutrons does neon have?

Question 17 options:

30

10

5

20

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Question 18 (5 points)

Which of the following statements about this atom are FALSE? Select all that apply.

Question 18 options:

This atom has a full outer shell

This atom has 10 electrons total

This atom has 6 electrons in the outer shell

This electron has 4 electrons in the inner shell