Quiz 1 Intro to Biology and Ecosystems
What is the mechanism of evolution as proposed by Charles Darwin?
natural selection
Two atoms of the same element with a different number of ________, are called ___________.
neutrons; isotopes
What are the two main processes that ecosystems depend upon?
nutrient cycling and energy flow
cellulose is
structural form found in plants
A hierarchical system of grouping living things according to their degree of similarity is
taxonomy
Autotrophs are essential components of an ecosystem because they
are the primary producers
The lower the pH of a solution, the
The lower the pH of a solution, the
An element has an atomic number of 32 and a mass number of 65. How many neutrons does it have?
33
If an atom has two neutrons, two electrons, and two protons, it has a mass number of
4
The hydrogen bonds between water molecules (check all that apply)
All 1) causes it to be less dense than water when it freezes, causing ice to float on water 2) allow it to absorb and release heat more slowly than other substances 3) make it a metal 4) allow it to easily mix with fats and oils
What is the fundamental difference between covalent and ionic bonding?
In a covalent bond, atoms share at least one pair of electrons to fill electron shells; in an ionic bond, one atom atoms accepts electrons from the other to fill electron shells.
Glucose and Fructose are
Monosaccharides
Check all that are found in the nucleus of an atom.
Neutron, electron, proton
All atoms of an element have the same number of _______.
Protons
An atom that is neutrally charged has the same number of ______ and ______
Protons and Electrons
A secondary consumer eats primary consumers true or false?
True
How does taxonomy assist biologists?
by categorizing diverse items into smaller and smaller numbers of groups
What are the basic units of life?
cells
We join the fatty acid chain to the glycerol molecule when building a triglyceride by pulling out ______. This is called the ______
condensation reaction, dehydration synthesis
A glycerol with three fatty acids attached is referred to as a _______.
fat
starch is
food storage form found in plants
Which of the following subatomic particles are NOT found in the nucleus of an atom?
only electrons
The type of bond formed between amino acids is called a:
peptide bond
A community is composed of
potentially interacting populations of different species of organisms
The linear sequence of amino acids in a polypeptide chain is referred to as a protein's ____________ structure.
primary
Enzymes are:
proteins
glycogen is
storage form found in animals
What sugar group is found in molecules of RNA and ATP?
ribose
Carl Linneus grouped organisms by
similarilty of physical characteristics
When a protein has achieved the ____________ level of protein structure, it takes on a 3-D shape due to the R-group interactions.
tertiary
The main abiotic reservoir for carbon is _____.
the atmosphere
In order to join to simple sugars together , ______ is removed and this process is called the ______
water, dehydration synthesis