BIO 130 PRACTICE EXAM QUESTIONS AND ANSWERS
GUARANTEE A+
✔✔Directional Selection - ✔✔Form of natural selection in which the entire curve moves;
occurs when individuals at one end of a distribution curve have higher fitness than
individuals in the middle or at the other end of the curve
✔✔Directional Selection - ✔✔
✔✔Directional Selection - ✔✔Type of selection involved in lengthening of giraffes' necks
✔✔Stabilizing Selection - ✔✔
✔✔Stabilizing Selection - ✔✔Natural selection that favors intermediate variants by
acting against extreme phenotypes
✔✔Stabilizing Selection - ✔✔Type of selection involved in human infant birth weights
✔✔Disruptive Selection - ✔✔
✔✔Disruptive Selection - ✔✔form of natural selection in which a single curve splits into
two; occurs when individuals at the upper and lower ends of a distribution curve have
higher fitness than individuals near the middle
✔✔Disruptive Selection - ✔✔Type of Selection involved in Daphnia that are either very
small or very large.
✔✔Sexual Selection - ✔✔
✔✔Sexual Selection - ✔✔A form of natural selection in which individuals with certain
inherited characteristics are more likely than other individuals to obtain mates.
✔✔Bateman's Principle - ✔✔The sex which invests more in the young becomes a
resource for which other members of the less parental sex compete
✔✔Bateman's Principle - ✔✔Variance in the reproductive success of males is greater
than that of females, this is ultimately the result of anisogamy.
✔✔Intrasexual Competition - ✔✔
✔✔Intrasexual Competition - ✔✔involves competition for mates, usually by males
✔✔Combat - ✔✔Traits selected by male _________ are called secondary sexual
characteristics (including horns, antlers, etc.), which Darwin described as "weapons"
, ✔✔Alternative Strategy - ✔✔a mating strategy used by males or females that differs
from the prevailing strategy of the sex
✔✔Alternative Strategy - ✔✔Example: High-backed pygmy swordtail populations have
some males who develop early in order to mate faster.
✔✔Infanticide - ✔✔the murder of infants
✔✔Infanticide - ✔✔has the general theme of the killer (often male) becoming the new
sexual partner of the victim's parent, which would otherwise be unavailable.
✔✔Sperm Competition - ✔✔In species where multiple males might inseminate a single
female, natural selection favors males with competitive sperm. Swimming speed seems
to be important.
✔✔Intersexual Selection - ✔✔Selection whereby individuals of one sex (usually
females) are choosy in selecting their mates from individuals of the other sex; also
called mate choice.
✔✔Female Choice - ✔✔Females retain primary control over reproduction. This is due to
the fact that she alone produces eggs and exerts a great deal of control over which
male's sperm will fertilize her eggs.
✔✔Behavior - ✔✔The way an organism reacts to changes in its internal condition or
external environment.
✔✔Cooperative Interaction - ✔✔occurs when organisms act together to promote
common interests or achieve shared goals
✔✔Cooperative Interaction - ✔✔Territorial choruses by male lions discourage intruders
and are likely to benefit all contributors.
✔✔Selfish Interaction - ✔✔Actor (Organism) benefits/recipient is harmed. Opposite of
Altruistic Interaction.
✔✔Altruistic Interaction - ✔✔Recipient befits/actor (Organism) is harmed. Opposite of
Selfish Interaction.
✔✔Spiteful Interaction - ✔✔Cost for the actor (organism) and a negative impact upon
the recipient.
✔✔Spiteful Interaction - ✔✔Infanticide is an example of this type of interaction
GUARANTEE A+
✔✔Directional Selection - ✔✔Form of natural selection in which the entire curve moves;
occurs when individuals at one end of a distribution curve have higher fitness than
individuals in the middle or at the other end of the curve
✔✔Directional Selection - ✔✔
✔✔Directional Selection - ✔✔Type of selection involved in lengthening of giraffes' necks
✔✔Stabilizing Selection - ✔✔
✔✔Stabilizing Selection - ✔✔Natural selection that favors intermediate variants by
acting against extreme phenotypes
✔✔Stabilizing Selection - ✔✔Type of selection involved in human infant birth weights
✔✔Disruptive Selection - ✔✔
✔✔Disruptive Selection - ✔✔form of natural selection in which a single curve splits into
two; occurs when individuals at the upper and lower ends of a distribution curve have
higher fitness than individuals near the middle
✔✔Disruptive Selection - ✔✔Type of Selection involved in Daphnia that are either very
small or very large.
✔✔Sexual Selection - ✔✔
✔✔Sexual Selection - ✔✔A form of natural selection in which individuals with certain
inherited characteristics are more likely than other individuals to obtain mates.
✔✔Bateman's Principle - ✔✔The sex which invests more in the young becomes a
resource for which other members of the less parental sex compete
✔✔Bateman's Principle - ✔✔Variance in the reproductive success of males is greater
than that of females, this is ultimately the result of anisogamy.
✔✔Intrasexual Competition - ✔✔
✔✔Intrasexual Competition - ✔✔involves competition for mates, usually by males
✔✔Combat - ✔✔Traits selected by male _________ are called secondary sexual
characteristics (including horns, antlers, etc.), which Darwin described as "weapons"
, ✔✔Alternative Strategy - ✔✔a mating strategy used by males or females that differs
from the prevailing strategy of the sex
✔✔Alternative Strategy - ✔✔Example: High-backed pygmy swordtail populations have
some males who develop early in order to mate faster.
✔✔Infanticide - ✔✔the murder of infants
✔✔Infanticide - ✔✔has the general theme of the killer (often male) becoming the new
sexual partner of the victim's parent, which would otherwise be unavailable.
✔✔Sperm Competition - ✔✔In species where multiple males might inseminate a single
female, natural selection favors males with competitive sperm. Swimming speed seems
to be important.
✔✔Intersexual Selection - ✔✔Selection whereby individuals of one sex (usually
females) are choosy in selecting their mates from individuals of the other sex; also
called mate choice.
✔✔Female Choice - ✔✔Females retain primary control over reproduction. This is due to
the fact that she alone produces eggs and exerts a great deal of control over which
male's sperm will fertilize her eggs.
✔✔Behavior - ✔✔The way an organism reacts to changes in its internal condition or
external environment.
✔✔Cooperative Interaction - ✔✔occurs when organisms act together to promote
common interests or achieve shared goals
✔✔Cooperative Interaction - ✔✔Territorial choruses by male lions discourage intruders
and are likely to benefit all contributors.
✔✔Selfish Interaction - ✔✔Actor (Organism) benefits/recipient is harmed. Opposite of
Altruistic Interaction.
✔✔Altruistic Interaction - ✔✔Recipient befits/actor (Organism) is harmed. Opposite of
Selfish Interaction.
✔✔Spiteful Interaction - ✔✔Cost for the actor (organism) and a negative impact upon
the recipient.
✔✔Spiteful Interaction - ✔✔Infanticide is an example of this type of interaction
