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.
kinetic energy
B.
chemical energy in glucose molecules
C.
carbon dioxide and water
D.
oxygen
Question #2
All of the living things on Earth along with all of the places where life exists is known as ___________________.
A.
an ecosystem
B.
a biological community
C.
the biosphere
D.
a population
Question #3
An organism with a cell wall, but no nucleus, is most likely a member of domain ________________.
A.
Archaea
B.
Protista
C.
Animalia
D.
Eukarya
Question #4
What was Charles Darwin's most significant original idea?
A.
He explained the relationship between genes and evolution.
B.
He explained how evolution occurs.
C.
He documented change in organisms over time.
D.
He observed variation within a species.
Question #5
Which example is a controlled experiment?
A.
making a list of all of the bird species observed at a feeder
B.
comparing the growth of ten seedlings grown under white light and another ten seedlings grown under red light
C.
using a microscope to observe organisms
D.
comparing the growth of ten seedlings grown under white light at 30°C and another ten seedlings grown under red light at 25°C
Question #6
Which four elements make up approximately 96% of living matter?
A.
carbon, hydrogen, nitrogen, oxygen
B.
carbon, sodium, hydrogen, nitrogen
C.
carbon, oxygen, phosphorus, hydrogen
D.
oxygen, hydrogen, calcium, nitrogen
Question #7
Two atoms that have the same mass number must have the same ___________________.
A.
number of protons + neutrons
B.
number of electrons
C.
protons
D.
atomic number
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 hydrophilic bond
B.
a covalent bond
C.
an ionic bond
D.
a hydrogen bond
Question #9
Which is considered a compound?
A.
O2
B.
H2
C.
N2
D.
NaCl
Question #10
A covalent bond is formed by ___________________.
A.
transferring an electron from one atom to another
B.
sharing a pair of protons between two atoms
C.
sharing a single electron between two atoms
D.
sharing a pair of electrons between two atoms
Question #11
A nonpolar covalent bond is one in which ____________________.
A.
one atom transfers an electron to another atom
B.
two atoms share a pair of protons equally
C.
two atoms share a pair of electrons equally
D.
two atoms share a pair of electrons unequally
Question #12
In what state of matter is water most dense and the water molecules closest together?
A.
liquid
B.
solid
C.
gas
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.
high specific heat
C.
evaporative cooling
D.
adhesion
Question #15
In an aqueous solution, a strong acid like HCl _______________________.
A.
acts as a base
B.
dissociates completely
C.
is a strong buffer
D.
increases the pH
Question #16
Buffers keep pH stable by releasing H+ ions when __________________________ are added.
A.
water molecules
B.
acids
C.
bases
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.
carbon dioxide and water
C.
kinetic energy
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 biological community
B.
a population
C.
the biosphere
D.
an ecosystem
Question #19
In the Galapagos Islands, finches with bigger beaks get more food, survive longer, and produce more offspring. This is called ____________________.
A.
mutualism
B.
an emergent property
C.
natural selection
D.
the organization of life
Question #20
Which organisms absorb nutrients from the environment as their main way of getting food?
A.
animals
B.
fungi
C.
plants
D.
mammals
Question #21
A control group is important because it __________________.
A.
provides extra experimental subjects
B.
helps the scientist determine whether a treatment has a significant effect on the experimental group
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.
calcium
B.
nitrogen
C.
iron
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.
mass number
C.
number of neutrons
D.
total number of electrons
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.
van der Waals interaction
B.
covalent bond
C.
ionic bond
D.
hydrogen bond
Question #27
electronegative. Which molecule has the most polar covalent bonds?
A.
O2
B.
CH4
C.
H2O
D.
H2
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.
2
B.
10
C.
100
D.
1
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.
evaporates
C.
contracts
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.
increasing the ocean temperature
B.
decreasing the H+ ion concentration
C.
increasing the H+ ion concentration
D.
decreasing the amount of carbonate ions
Question #31
In which state of matter is water least dense and the molecules of water farthest apart?
A.
solid
B.
liquid
C.
gas
Question #32
When CO2 is released into the bloodstream, the blood pH ________________________.
A.
stays the same
B.
decreases slightly
C.
increases slightly
Question #33
For water to evaporate, ___________________ must be broken.
A.
hydrogen bonds
B.
nonpolar covalent bonds
C.
polar covalent bonds
D.
ionic bonds
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