Bio. 100- Exam 1 chapters 1-2

Question 1

Why is it important to study biology?

Answer 1

To research and to get a better idea of life.

Question 2

True or false: Basic science is used to solve practical problems and uses the discoveries from
applied science.

Answer 2

False

Question 3

Deductive reasoning

Answer 3

uses the scientific method to generate specific results.

Question 4

Inductive reasoning

Answer 4

uses related observations to arrive at a general conclusion.

Question 5

scientific theory

Answer 5

An explanation of why natural phenomena occurs based off of multiple tests and hypotheses.

Question 6

List the order of the scientific method.

Answer 6

Observation, Research, Hypothesis, Develop a controlled experiment, Experimental
group, control group, Evaluate results, conform or refute hypothesis.

Question 7

_ Standardized variable a. Variable that the investigator directly manipulates.

_ Independent variable b. Response that is dependent on independent variable.

_ Dependent variable c. Held as a constant for all subjects in experiment.

Answer 7

C_ Standardized variable a. Variable that the investigator directly manipulates.

A_ Independent variable b. Response that is dependent on independent variable.

B_ Dependent variable c. Held as a constant for all subjects in experiment.

Question 8

List the properties that are common to all life forms.

Answer 8

Order, Response to stimuli, Regulation, Reproduction, Growth and Development, Energy
processing, Adaptation and evolution.

Question 9

order of biological hierarchy beginning with the biggest level?

Answer 9

Biosphere, ecosystem, community, population, organism, organ system, organ, tissue, cells, organelles, macromolecules, molecules, atoms.

Question 10

Why are cells considered a special level in the hierarchy?

Answer 10

Multiple organelles work together.

Question 11

______________ get their energy by consuming other organisms. Producers use energy and nutrients from their environment to create their own food source. Decomposers break down dead organisms and organic wastes for energy.

Answer 11

Consumers

Question 12

Describe how adaptation leads to evolution.

Answer 12

When their environment changes organisms will change with it and over time the
changes will become more different.

Question 13

List the three domains of life and briefly describe them.

Answer 13

Domain Bacteria- Typical bacteria
Domain Archaea- Thrive in extreme habitats
Doman Eukaryotic- Has multiball kingdoms

Question 14

True or false: An element is the smallest form of matter with specific chemical and physical
properties while a trace element is an element that is needed in very small amounts.

Answer 14

true

Question 15

Which of the following elements make up most of all living organisms?

A. Carbon
B. Oxygen
C. Hydrogen
D. Nitrogen
E. All the above

Answer 15

E. All the above

Question 16

What are the charge, mass, and location of an proton, neutron, and a electron

Answer 16

Charge Mass Location
proton + 1 Nucleus
neutron 0 1 Nucleus
electron - 0 Valence shell

Question 17

Define an atomic number.

Answer 17

proton

Question 18

Use the atomic number and mass to write and draw out the valence shell notation.: Carbon

Answer 18

Number of protons: 6 Number of neutrons: 6 Number of electrons: 6

Question 19

Define an isotope and list some uses of radioisotopes.

Answer 19

One or more forms of elements that have different numbers of neutrons.

Question 20

True or false: A cation has a positive charge due to gaining an electron.

Answer 20

false

Question 21

Hydrogen bond

Answer 21

Weak bonds between partially negative regions of one molecule to the partially positive region of hydrogen.

Question 22

Covalent bond

Answer 22

Attractions between ions of opposite charges.

Question 23

Ionic bond

Answer 23

Two atoms that share one or more valence electrons.

Question 24

How is matter conserved in chemical reactions?

Answer 24

Temperature

Question 25

List some properties of water that are due to it being polar.

Answer 25

Ice, Water

Question 26

True or False: A solvent is dissolved or mixed into a solute to create a solution.

Answer 26

false

Question 27

Define an acid and a base.

Answer 27

Acid- a substance that donates hydrogen ions and therefore lowers pH.
Base- a substance that absorbs hydrogen ions and therefore raises pH.