Biology 103 Quiz 1

Biology 103 Quiz 1

QUIZ1- Week1
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? None, symmetry is not a basic characteristic of life.

Question 1 options:

order

none, symmetry is not a basic characteristic of life

growth and development

evolution

Question 2 (5 points)

Which of the following lists correctly presents levels of organization from most complex to simplest? Biosphere, community, organism, cell

Question 2 options:

macromolecule, population, community, ecosystem

cell, organelle, atom, molecule

ecosystem, community, organelle, cell

Question 3 (5 points)

Which of the following statements must be *FALSE*? A & B same genus, different kingdom

biosphere, community, organism,

cell

Question 3 options:

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

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

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

Question 4 (5 points)

What are the eukaryotic kingdoms? Protists, Fungi, Plants, Animals Question 4 options:

Bacteria, Archae
Eukarya, Archaea, Bacteria Protists, Fungi, Plants, Animals

Phylum, Class, Order

Question 5 (5 points)
An "educated guess" as to what causes an observed

phenomenon is known as a ___. Hypothesis Question 5 options:

theory

hypothesis

control

Species A and B belong to the same genus, but different

kingdoms

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

conclusion

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? The birds switch to a warning call whenever there is danger

Question 6 options:

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

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)

The scientists who are researching the effectiveness of the HPV vaccine will test their hypothesis by separating 2,392 young women into two groups: the control group and the experimental group. Which of the following groups most likely represents the experimental group? A group given the HPV vaccine

Question 7 options:
A group given a placebo

A group given the HPV vaccine
A group deliberately infected with HPV A group given nothing

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

Question 8 (5 points)
What is the main purpose of conducting experiments? Disproving a hypothesis

Question 8 options:
proving a theory correct

proving a hypothesis correct

making initial observations

disproving a hypothesis

Question 9 (5 points)
Order the steps of the scientific method from the first step (1) to the last (). 0-H-E-A-R

Question 9 options:

Conduct Experiment3 State Hypothesis2 Analyze Data4 Report Results5 Make Observation 1

Previous PageNext Page Question 10 (5 points)

Students are designing an experiment to see if changes in pH have an impact on the action of enzymes. Which is the best hypothesis? Will acidic pH reduce enzyme action?

Question 10 options:

Will acidic pH reduce enzyme action?

The pH and the temperature of the solution will have an effect on the reaction.

A change in pH will change enzyme activity.

A pH of 10 will result in less enzyme activity compared to pH 7.

Question 11 (5 points)

You have formulated a hypothesis: "Mangos contain more vitamin C than oranges." To test your hypothesis you measure vitamin C levels in 20 oranges and 20 mangos from trees that were grown in the same orchard under the same environmental conditions (temperature, rain, sunlight). What is the independent variable in this experiment? Vitamin C Levels

Question 11 options:

The amount of rain and sunlight the trees received

Vitamin C levels

The type of fruit
The type of soil the trees grew in

Question 12 (5 points)

What is the mass number (atomic mass) of this atom? 13 Question 12 options:

5 4 13

9

Page 4 of 7 Question 13 (5 points)

Water molecules have one oxygen atom that is more electronegative than the two hydrogen atoms bound to it. As a result, which type of bonding holds the atoms within one water molecule together? Non—polar covalent bonding

Question 13 options:

non-polar covalent bonding

polar covalent bonding

ionic bonding

hydrogen bonds

Question 14 (5 points)
Which of the following statements is true?

Question 14 options:

Ionic compounds and polar molecules can readily dissolve in water.

The non-polar nature of water molecules makes water an efficient solvent. Water is an excellent solvent for non-polar substances.

Question 15 (5 points)

and polar molecules can readily dissolve in water.

Ionic compounds

Water is not a good solvent for ionic compounds.

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

Question 15 options:

covalent bonds ionic bonds hydrogen bonds

non-polar covalent bonds

Question 16 (5 points)
What type of chemical bond holds the Na+ and Cl- ions together in table salt? Question 16 options:

covalent bonds

ionic bonds

hydrogen bonds non-polar covalent bonds Ionic bonds

Question 17 (5 points)

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

Question 17 options:

5

30

10

20     

Page 6 of 7

Question 18 (5 points)

How many electrons does a fluorine atom have in its first shell? Two

Question 18 options:

2 8

19

27

Question 19 (5 points)

Which of the following pH values is most basic? pH10 Question 19 options:

pH 10

pH 7

pH 4

pH 2

Question 20 (5 points)
What are two atoms with the same atomic number, but

different atomic mass, called? Isotopes Question 20 options:

Radioactive

Isotopes

Neutrons

nuclei