Which molecule is used by cells as an energy source?
Responses
A ATPATP
B DNADNA
C phosphatephosphate
D oxygen
13 answers
A - ATP (adenosine triphosphate)
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19:17
Question
The animals in the food web release _____________ into the environment, which plants then use for ___________.
Responses
A oxygen:respirationoxygen:respiration
B carbon dioxide:respirationcarbon dioxide:respiration
C water vapor:photosynthesiswater vapor:photosynthesis
D carbon dioxide:photosynthesis
19:17
Question
The animals in the food web release _____________ into the environment, which plants then use for ___________.
Responses
A oxygen:respirationoxygen:respiration
B carbon dioxide:respirationcarbon dioxide:respiration
C water vapor:photosynthesiswater vapor:photosynthesis
D carbon dioxide:photosynthesis
D - carbon dioxide:photosynthesis
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19:52
Question
Solar radiation travels through the earth's atmosphere and warms the planet's surface. Greenhouse gases like carbon dioxide in the earth's atmosphere reabsorb the heat and warm the planet. The amounts of greenhouse gases have been increasing over the past century, causing the earth's surface temperature to increase. This gradual temperature change is thought to have many negative environmental consequences.
Select which of these might be a POSITIVE effect of the increase in carbon dioxide levels?
Responses
A rise in sea levelsrise in sea levels
B decrease in plant growthdecrease in plant growth
C increase in plant growthincrease in plant growth
D increased melting of ice caps
19:52
Question
Solar radiation travels through the earth's atmosphere and warms the planet's surface. Greenhouse gases like carbon dioxide in the earth's atmosphere reabsorb the heat and warm the planet. The amounts of greenhouse gases have been increasing over the past century, causing the earth's surface temperature to increase. This gradual temperature change is thought to have many negative environmental consequences.
Select which of these might be a POSITIVE effect of the increase in carbon dioxide levels?
Responses
A rise in sea levelsrise in sea levels
B decrease in plant growthdecrease in plant growth
C increase in plant growthincrease in plant growth
D increased melting of ice caps
C - increase in plant growth
This model shows the process of photosynthesis. The Law of Conservation of Mass reminds us that matter is neither created nor destroyed, so the atoms present in the reactants of photosynthesis are still present in the products of photosynthesis. Which of these equations accurately portrays this fact?
Responses
A CO2 + H2O + light energy → C6H12O6 + O2CO 2 + H 2 O + light energy → C 6 H 12 O 6 + O 2
B 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O26 CO 2 + 6 H 2 O + light energy → C 6 H 12 O 6 + 6 O 2
C 6 O2 + 6 H2O + light energy → C6H12O6 + 6 CO26 O 2 + 6 H 2 O + light energy → C 6 H 12 O 6 + 6 CO 2
D 6 CO2 + 6 H2O + light energy → 6 C6H12O6 + 6 O2
Responses
A CO2 + H2O + light energy → C6H12O6 + O2CO 2 + H 2 O + light energy → C 6 H 12 O 6 + O 2
B 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O26 CO 2 + 6 H 2 O + light energy → C 6 H 12 O 6 + 6 O 2
C 6 O2 + 6 H2O + light energy → C6H12O6 + 6 CO26 O 2 + 6 H 2 O + light energy → C 6 H 12 O 6 + 6 CO 2
D 6 CO2 + 6 H2O + light energy → 6 C6H12O6 + 6 O2
B - 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2
During the light-dependent reactions of photosynthesis, we would expect what compound(s) to be produced?
Responses
A glucoseglucose
B ATP and NADPHATP and NADPH
C water and NADPHwater and NADPH
D glucose and oxygenglucose and oxygen
Question 2
During the second set of photosynthetic reactions, called the Calvin cycle, all BUT ONE of the following occurs.
Responses
A Glucose is the end product of the Calvin cycle.Glucose is the end product of the Calvin cycle.
B By-products of the Calvin cycle include water vapor and oxygen.By-products of the Calvin cycle include water vapor and oxygen.
C Carbon dioxide, a reactant of photosynthesis, is utilized during the Calvin cycle.Carbon dioxide, a reactant of photosynthesis, is utilized during the Calvin cycle.
D ATP and NADPH, high energy molecules, are utilized to produce stored chemical energy.
Responses
A glucoseglucose
B ATP and NADPHATP and NADPH
C water and NADPHwater and NADPH
D glucose and oxygenglucose and oxygen
Question 2
During the second set of photosynthetic reactions, called the Calvin cycle, all BUT ONE of the following occurs.
Responses
A Glucose is the end product of the Calvin cycle.Glucose is the end product of the Calvin cycle.
B By-products of the Calvin cycle include water vapor and oxygen.By-products of the Calvin cycle include water vapor and oxygen.
C Carbon dioxide, a reactant of photosynthesis, is utilized during the Calvin cycle.Carbon dioxide, a reactant of photosynthesis, is utilized during the Calvin cycle.
D ATP and NADPH, high energy molecules, are utilized to produce stored chemical energy.
During the light-dependent reactions of photosynthesis, we would expect the compound ATP and NADPH to be produced. (B - ATP and NADPH)
During the second set of photosynthetic reactions, called the Calvin cycle, glucose is the end product of the cycle. (A - Glucose is the end product of the Calvin cycle)
During the second set of photosynthetic reactions, called the Calvin cycle, glucose is the end product of the cycle. (A - Glucose is the end product of the Calvin cycle)
Consider this living plant a system. To be alive, the plant needs energy. As a plant, it produces its own usable chemical energy by photosynthesis and uses that same energy through cellular respiration. One output of photosynthesis is a critical reactant or input for respiration. That is
Responses
A water.water.
B oxygen.oxygen.
C sunlight.sunlight.
D carbon dioxide.
Responses
A water.water.
B oxygen.oxygen.
C sunlight.sunlight.
D carbon dioxide.
B - oxygen
During winter, what factors can reduce the rate of photosynthesis in evergreens such as pine trees? Choose "2" that apply.
Responses
A less sunlightless sunlight
B colder temperaturescolder temperatures
C more water availability
more water availability
D increased oxygen availabilityincreased oxygen availability
E decreased carbon availability
Responses
A less sunlightless sunlight
B colder temperaturescolder temperatures
C more water availability
more water availability
D increased oxygen availabilityincreased oxygen availability
E decreased carbon availability
The factors that can reduce the rate of photosynthesis in evergreens such as pine trees during winter are:
A - less sunlight
B - colder temperatures
A - less sunlight
B - colder temperatures
1 answer