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JCCC EVRN 124 Exam 3 Questions with correct Answers
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JCCC EVRN 124 Exam 3
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JCCC EVRN 124 Exam 3Life on Earth exhibits both unity and diversity. The unity refers to the idea that ____. -
answerAll species share the same underlying mechanisms for capturing and storing
energy between generations
Charles Darwin proposed that organisms ____ when he proposed his idea of evolution.
- answer Change with time to fit the physical and chemical environment
After millions of years of favorable adaptations, Pygmy seahorses ____. - answer Avoid
predation through camouflage
A spontaneous, inheritable change in an organism's genes is called a ____. - answer
Mutation
Beneficial inheritable structural or behavioral traits are known as ____. -
answerAdaptations
The process by which accumulated adaptations result in superficially similar animals
derived from different stock is called ____. - answerConvergent evolution
Most mutations have no obvious effect or are unfavorable, and the organisms
possessing them ____. - answerAre eliminated by other organisms
The term used to describe species that are remotely related, yet resemble each other in
shape because their traits were independently selected by environmental conditions
____. - answerConvergent evolution
Dolphins, penguins, ichthyosaurs have undergone ____ that gave them similar shapes
through adaptations that permitted rapid swimming. - answerConvergent evolution
Mass extinctions have occurred ____ in the last ____. - answerFive times; 450 million
years
What do prokaryotes lack? - answerA nucleus
The three domains of living things are the Eukarya, Bacteria, and ____. -
answerArchaea
Cells of the ____ domain are larger than those of the ____ domain. - answerEukarya;
Bacteria
, Linnaeus was best known for his greatest contribution of ____. - answerClassification
system based on hierarchy, a grouping of objects by degrees of complexity, grade, or
class
Living organisms are ____, which differentiates them from nonliving organisms. -
answerAble to capture, store, and transmit energy
In photosynthesis, plants use the energy in sunlight to convert water and carbon dioxide
into ____. - answerCarbohydrates and oxygen
Light energy from the sun is trapped by ____ in primary producers and change into
chemical energy. - answerChlorophyll
____ are responsible for the vast majority of the ocean's primary productivity. -
answerPhytoplankton
Consumers that eat primary producers are called ____. - answerPrimary consumers
The organisms that make their own food are called ____. - answerPrimary producers
Which of the following is an example of a primary producer? - answerPhytoplankton
Scientists can observe primary productivity in the ocean from space by measuring the
____. - answerAmount of chlorophyll in surface waters
Which wavelength of light penetrates to the greatest depth in ocean water? -
answerBlue
In ____, dissolved substances slowly spread out from regions of high concentrations to
regions of low concentration. - answerDiffusion
When the concentrations of dissolved substances in water on either side of a cell
membrane are the same, the situation is described as being ____. - answerIsotonic
The zone of ocean water where photosynthetic organisms have enough light to thrive is
called the ____. - answerEuphotic zone
Though it is difficult to generalize for the ocean as a whole, the bottom of the euphotic
zone is about ____ deep in mid-latitudes. - answer70 meters (230 feet)
A physical or biological necessity whose presence in inappropriate amounts limits the
normal action of an organism is known as a ____. - answerLimiting factor
The average pH of seawater is about ____. - answer8
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