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Biology 20 - Chapter 1 and 2 Exam Questions and Answers
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Biology 20 - Chapter 1 and 2 Exam Questions and Answers
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Biology 20 - Chapter 1 and 2 ExamQuestions and Answers
What is an open system? - Answers -Allows energy and matter to cross its boarder.
What is a closed system? - Answers -Only allows energy, not matter, to cross its
boarder.
Matter cycles without what? - Answers -The biosphere.
Energy passes through what in the biosphere? - Answers -The matter.
Chemical energy is transferred from? - Answers -Producers to consumers to
decomposers.
All energy eventually does what? - Answers -Dissipates into the environment as heat.
Surfaces without snow or ice absorb? - Answers -Heat.
Surfaces with snow and ice do what? - Answers -Reflect heat.
What is albedo? - Answers -The amount of reflected energy.
What is the equation for photosynthesis? - Answers -Carbon dioxide + water + energy --
> glucose + oxygen.
What is the equation for cellular respiration? - Answers -Glucose + oxygen --> carbon
dioxide + water + energy.
What is chemosynthesis? - Answers -The conservation of carbon molecules into
carbohydrates in the absence of sunlight. Producers capture the energy stored in
chemical bonds and convert it to chemical energy.
How does chemosynthesis work? - Answers -Bacteria dwell within tissues of organisms
and they are able to split the hydrogen sulfide molecules spewing from the deep sea
vents. The bacteria then captures the energy stored in the chemical bonds of the
molecule. Sulphuric acid is produced as a byproduct of this process.
What is a trophic level? - Answers -Trophic levels are levels through which energy is
transferred.
, What are autotrophs? - Answers -Also known as a producer. Produce their own energy.
Photosynthetic or chemosynthetic.
What are heterotrophs? - Answers -Consumers.
What are producers? - Answers -Organisms that produce their own energy from
processes such as photosynthesis and chemosynthesis.
What does the primary consumer consume? - Answers -Producer.
What does secondary consumers consume? - Answers -Primary consumers.
What do tertiary consumers consume? - Answers -Tertiary consumers.
What are decomposers? - Answers -Organisms that break down biodegradable matter.
Usually small or microorganisms.
How much energy is transferred between trophic levels. - Answers -10%
What is the pyramid of numbers? - Answers -Based on the number of organisms in
each trophic level. Organisms at the higher trophic levels are often fewer in numbers
than those at lower numbers.
What is biomagnification? - Answers -Biomagnification is the tendency of a pollutant to
appear at higher concentrations at higher levels in a food chain.
Water is reused through what cycle? - Answers -The hydrologic cycle.
Water maintain our homeostasis by? - Answers -Controlling body temperature.
Assisting in digestion and transport of nutrients. Bathing cells in extracellular fluid.
What ways does the human body loose water? - Answers -Cellular respiration results in
sweat and loss of heat/urination. Coffee and alcohol are antidiuretic (the body is told not
to contain water).
Water this is produced by cellular respiration is know as what? - Answers -Metabolic
water (water inside the organism).
What is cohesion? - Answers -Water molecules stick together and create high surface
tension.
What is adhesion? - Answers -Water molecules stick to other molecules or other
substances.
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