Multiple Choice

__________________True
False

Question 21 PointAll of the members of the same species occupying the same area at the same time constitute a(n):population
biosphere
ecosystem
community
individual

Question 31 PointIf you observe a cell that contains organelles, then that cell is most likely a(n) prokaryote. __________________True
False

Question 41 PointThe valence shell of hydrogen or helium is unstable when it contains two electrons.True
False

Question 51 PointOxidation occurs when an atom gains one or more electrons.__________________True
False

Question 61 PointConsider the aquatic insects pictured in the accompanying figure. Which characteristic of water molecules directly contributes to their remarkable “water walking” success?ionic bonds
nonpolar covalent bonds
adhesive forces
capillary action
hydrogen bonds

Question 71 PointHow can we identify a particular element?By its number of electrons
By its amount of energy levels
By its number of protons
By its shape of valence shells
By its number of neutrons

Question 81 PointAn organism that is eukaryotic is by definition:belongs to domain Bacteria
is a protist
possesses a nucleus
possesses organ systems
is unicellular

Question 91 PointA salt is a compound in which the hydrogen ion of ____ is replaced by some other cation.an acid
a hydroxide ion
an anion
water
a base

Question 101 PointInformation in living organisms is transmitted by which mechanism(s)?hormones only
genes and hormones
genes, hormones, and neurotransmitters
genes only
neurotransmitters only