EVR 2001 Exam 2 Actual set with
Questions and correct/verified Answers
K-selected species_______. - ANSWER-tend to reproduce later in life and have a small number of
offspring with fairly long life spans
A species that is found only on one island would be described as _____. - ANSWER-endemic
A population of squirrels becomes divided into two halves by a flooding river. Over time, the river
becomes larger and the populations are not able to interact for many years. Which of the following is the
most likely outcome? - ANSWER-Geographic isolation may lead to speciation
Species that are r-selected are often ______. - ANSWER-the ANSWER is not capable of acting as k-
selected species in the right conditions
Ecologists primarily focus on studying interactions from the level of _____ to the level of ______. -
ANSWER-organisms; the biosphere
A relationship in which both species benefit best illustrates ______. - ANSWER-mutualism
The process by which members of isolated populations become so different in genetic makeup that they
cannot produce live, fertile offspring if they are rejoined together is best described as ________. -
ANSWER-reproductive isolation
Complex networks of interconnected food chains in ecosystems are best described as _______. -
ANSWER-food webs
_______ is a technology that enables scientists to make new sequences of DNA and to use such genetic
information to design and create new cells, tissues, organisms, and devices, and to redesign natural
biological systems. - ANSWER-synthetic biology
The collective term for factors that act to limit the growth of populations is _______. - ANSWER-
environmental resistance
sharks are especially vulnerable to population declines because ___________. - ANSWER-they grow
slowly, mature late, and have only a few offspring per generation
Giant African millipedes often serve as the home for small mites that scavenge organic matter, but the
millipedes do not appear to be affected by the interaction. This is an example of ____. - ANSWER-
commensalism
A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety
of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take
advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the
meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey
on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the
butterflies and other flying insects, such as bees and wasps.
Questions and correct/verified Answers
K-selected species_______. - ANSWER-tend to reproduce later in life and have a small number of
offspring with fairly long life spans
A species that is found only on one island would be described as _____. - ANSWER-endemic
A population of squirrels becomes divided into two halves by a flooding river. Over time, the river
becomes larger and the populations are not able to interact for many years. Which of the following is the
most likely outcome? - ANSWER-Geographic isolation may lead to speciation
Species that are r-selected are often ______. - ANSWER-the ANSWER is not capable of acting as k-
selected species in the right conditions
Ecologists primarily focus on studying interactions from the level of _____ to the level of ______. -
ANSWER-organisms; the biosphere
A relationship in which both species benefit best illustrates ______. - ANSWER-mutualism
The process by which members of isolated populations become so different in genetic makeup that they
cannot produce live, fertile offspring if they are rejoined together is best described as ________. -
ANSWER-reproductive isolation
Complex networks of interconnected food chains in ecosystems are best described as _______. -
ANSWER-food webs
_______ is a technology that enables scientists to make new sequences of DNA and to use such genetic
information to design and create new cells, tissues, organisms, and devices, and to redesign natural
biological systems. - ANSWER-synthetic biology
The collective term for factors that act to limit the growth of populations is _______. - ANSWER-
environmental resistance
sharks are especially vulnerable to population declines because ___________. - ANSWER-they grow
slowly, mature late, and have only a few offspring per generation
Giant African millipedes often serve as the home for small mites that scavenge organic matter, but the
millipedes do not appear to be affected by the interaction. This is an example of ____. - ANSWER-
commensalism
A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety
of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take
advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the
meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey
on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the
butterflies and other flying insects, such as bees and wasps.
