Biology 101 - General Biology » Spring 2022 » Module 1 Quiz 1
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Question #1
Organisms interact with their environments. For example, molecules in plant leaves convert the energy of sunlight to _______________________.
A.
carbon dioxide and water
B.
chemical energy in glucose molecules
C.
oxygen
D.
kinetic energy
Question #2
All of the living things on Earth along with all of the places where life exists is known as ___________________.
A.
a population
B.
a biological community
C.
the biosphere
D.
an ecosystem
Question #3
An organism with a cell wall, but no nucleus, is most likely a member of domain ________________.
A.
Protista
B.
Eukarya
C.
Archaea
D.
Animalia
Question #4
What was Charles Darwin's most significant original idea?
A.
He observed variation within a species.
B.
He documented change in organisms over time.
C.
He explained how evolution occurs.
D.
He explained the relationship between genes and evolution.
Question #5
Which example is a controlled experiment?
A.
comparing the growth of ten seedlings grown under white light and another ten seedlings grown under red light
B.
making a list of all of the bird species observed at a feeder
C.
comparing the growth of ten seedlings grown under white light at 30°C and another ten seedlings grown under red light at 25°C
D.
using a microscope to observe organisms
Question #6
Which four elements make up approximately 96% of living matter?
A.
carbon, oxygen, phosphorus, hydrogen
B.
carbon, sodium, hydrogen, nitrogen
C.
oxygen, hydrogen, calcium, nitrogen
D.
carbon, hydrogen, nitrogen, oxygen
Question #7
Two atoms that have the same mass number must have the same ___________________.
A.
atomic number
B.
number of protons + neutrons
C.
number of electrons
D.
protons
Question #8
The slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called?
A.
a hydrogen bond
B.
an ionic bond
C.
a hydrophilic bond
D.
a covalent bond
Question #9
Which is considered a compound?
A.
NaCl
B.
H2
C.
N2
D.
O2
Question #10
A covalent bond is formed by ___________________.
A.
transferring an electron from one atom to another
B.
sharing a single electron between two atoms
C.
sharing a pair of electrons between two atoms
D.
sharing a pair of protons between two atoms
Question #11
A nonpolar covalent bond is one in which ____________________.
A.
two atoms share a pair of electrons equally
B.
one atom transfers an electron to another atom
C.
two atoms share a pair of electrons unequally
D.
two atoms share a pair of protons equally
Question #12
In what state of matter is water most dense and the water molecules closest together?
A.
liquid
B.
gas
C.
solid
Question #13
Will table salt (NaCl) dissolve more in methanol (a nonpolar substance) or pure water?
A.
NaCl dissolves more in pure water
B.
NaCl dissolves more in methanol
Question #14
An insect, such as a water strider, can walk across the surface of a lake due to the ____________________________ of water.
A.
high surface tension
B.
adhesion
C.
evaporative cooling
D.
high specific heat
Question #15
In an aqueous solution, a strong acid like HCl _______________________.
A.
increases the pH
B.
dissociates completely
C.
is a strong buffer
D.
acts as a base
Question #16
Buffers keep pH stable by releasing H+ ions when __________________________ are added.
A.
bases
B.
water molecules
C.
acids
D.
sodium (Na+) ions
Question #17
Organisms interact with their environments. For example, molecules in plant leaves convert the energy of sunlight to _______________________.
A.
chemical energy in glucose molecules
B.
kinetic energy
C.
carbon dioxide and water
D.
oxygen
Question #18
All of the living things on Earth along with all of the places where life exists is known as ___________________.
A.
a population
B.
a biological community
C.
an ecosystem
D.
the biosphere
Question #19
In the Galapagos Islands, finches with bigger beaks get more food, survive longer, and produce more offspring. This is called ____________________.
A.
natural selection
B.
mutualism
C.
the organization of life
D.
an emergent property
Question #20
Which organisms absorb nutrients from the environment as their main way of getting food?
A.
plants
B.
animals
C.
mammals
D.
fungi
Question #21
A control group is important because it __________________.
A.
helps the scientist determine whether a treatment has a significant effect on the experimental group
B.
provides extra experimental subjects
C.
is required for the development of an "If . . . then" statement
D.
means that an experiment will be repeatable
Question #22
Trace elements are required by an organism in very small amounts. Which trace element is required by all living organisms?
A.
nitrogen
B.
iron
C.
calcium
D.
sodium
Question #23
The atomic number of sulfur is 16, which means that sulfur has _____________________.
A.
8 protons and 8 neutrons
B.
16 protons
C.
16 neutrons
D.
16 protons and 16 neutrons
Question #24
The number of bonds formed by an atom is determined by the ______________________.
A.
number of valence electrons
B.
total number of electrons
C.
number of neutrons
D.
mass number
Question #25
Oxygen has an atomic number of 8 and a mass number of 16. What is the atomic mass of an oxygen atom?
A.
approximately 8 amu (daltons)
B.
approximately 8 grams
C.
approximately 16 amu (daltons)
D.
approximately 16 grams
Question #26
The attraction between two different water molecules is called a(n) ________________________.
A.
ionic bond
B.
covalent bond
C.
van der Waals interaction
D.
hydrogen bond
Question #27
electronegative. Which molecule has the most polar covalent bonds?
A.
H2
B.
H2O
C.
O2
D.
CH4
Question #28
If the cytoplasm of a cell is at pH 7 and the mitochondrial matrix is at pH 8, the pH of the cytoplasm is _________________________ times more acidic than the mitochondrial matrix.
A.
10
B.
2
C.
1
D.
100
Question #29
As liquid water cools from 4 degrees Celsius to become ice (solid water) at 0 degrees Celsius, it ___________________________.
A.
becomes more dense
B.
contracts
C.
evaporates
D.
expands
Question #30
Too much atmospheric carbon dioxide damages coral reefs in the ocean. Which factor is NOT a cause of this damage?
A.
decreasing the amount of carbonate ions
B.
decreasing the H+ ion concentration
C.
increasing the ocean temperature
D.
increasing the H+ ion concentration
Question #31
In which state of matter is water least dense and the molecules of water farthest apart?
A.
liquid
B.
gas
C.
solid
Question #32
When CO2 is released into the bloodstream, the blood pH ________________________.
A.
stays the same
B.
increases slightly
C.
decreases slightly
Question #33
For water to evaporate, ___________________ must be broken.
A.
polar covalent bonds
B.
nonpolar covalent bonds
C.
hydrogen bonds
D.
ionic bonds
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