q1 Flashcards
(26 cards)
A hypothesis is a(n) ________________.
Tentative answer to a question
What is biology?
the scientific study of life
Which of the following is NOT a property of life?
Populations of organisms rarely change over time.
Which of the following structures can perform all the activities required for life?
cells
Relative to prokaryotic cells, eukaryotic cells are usually ________.
larger and more complex
The DNA of a eukaryotic cell is found within the ________.
nucleus
Which domain(s) consist(s) of prokaryotic cells?
Bacteria and Archaea
Which of the following is a producer?
oak tree
Humans are __________.
consumers
Science is _________________.
the inquiry-based effort to describe and explain nature
How do hypotheses differ from theories?
Theories are more comprehensive than hypotheses.
Which of the following statements about the domain Bacteria is true?
All bacteria lack a nucleus.
An atom’s ________ are found in its nucleus.
neutrons and protons
The lower the pH of a solution, the ________.
more acidic the solution
Which of the following is an example of a polysaccharide?
sucrose
What name is given to bonds that involve the sharing of electrons?
covalent
Sweating cools your body by ________.
evaporative cooling
Adjacent water molecules are joined by ________ bonds.
hydrogen
Proteins are polymers constructed from __________ monomers.
fatty acid
Human body cells are approximately ________ water.
70–95%
The tendency of molecules of the same kind to stick together is called ________.
cohesion
As water freezes, ________.
its molecules move farther apart
Sugar dissolves when stirred into water. The sugar is the ________, the water is the ________, and the sweetened water is the ________.
solute… solvent… solution
Relative to a pH of 6, a pH of 4 has a ________.
100 times higher H+concentration
