BI110 Chapter Notes - Chapter 4: Closed System, Thermodynamics, Potential Energy
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1A.
A <---> B
You measure the amount of molecules A and B for the reversible reaction above at a particular time point and find more of molecule A than of B. Your colleague believes that the reaction is at equilibrium. Which of the following statements about this reaction is correct? (select all that apply)
A | A --> B is exergonic |
B | B --> A is exergonic |
C | B --> A is endergonic |
D | A --> B is endergonic |
E | Your colleague must be wrong. If the reaction were at equilibrium, there must be equal amounts of molecule A and B. |
1B. Which of the following is/are true of energy and chemical gradients? (select all that apply)
A | A concentration gradient represents a form of potential (stored) energy. |
B | Movement of a molecule down a concentration gradient across a membrane releases energy that can be used to do work. |
C | If a molecules cross a membrane at equal rates in both directions (is at equilibrium) this movement is neither exergonic or endergonic. |
D | Moving molecules against a concentration gradient is an endergonic process. |
Question 1
Which is a population?
All the members of a species inhabiting a given location. | ||
All the interacting populations in a given area. | ||
The living community and the physical environment functioning together as an independant and relatively stable system. | ||
All of the above |
5 points
Question 2
Which is not an abiotic factor?
Intensity of light | ||
type of substratum | ||
range of temperatures | ||
living things |
5 points
Question 3
What does the fertility rate have to be in order to keep a population stable (neither increasing or decreasing)?
1 | ||
2 | ||
3 | ||
4 |
5 points
Question 4
Japan's population is falling due to a low fertility rate.
True
False
5 points
Question 5
When the population remains relatively constant over a number of years this is known as
steady state | ||
abiotic state | ||
biotic state | ||
Both abiotic and biotic states |
5 points
Question 6
Which are the living components of the environment? |
biotic factors | ||
abiotic factors | ||
neutrality factors | ||
non-organic factors |
5 points
Question 7
What is carrying capacity?
The maximum number of organisms the resources of an area can support. | ||
The amount of abiotic factors in an area. | ||
The amount of energy. | ||
The density of a star. |
5 points
Question 8
Which can synthesize their own food?
heterotroph | ||
herbivore | ||
autotroph | ||
carnivore |
5 points
Question 9
Which is an example of a saprophyte?
vulture | ||
bacteria | ||
mouse | ||
frog |
5 points
Question 10
This consumes both plants and animals.
Carnivore | ||
Herbivore | ||
Omnivore | ||
Tachivore |
5 points
Question 11
Global warming might actually cause global freezing.
True
False
5 points
Question 12
There are good odds that a future virus can cause the extinction of the human race.
True
False
5 points
Question 13
A heterotroph can make its own food.
True
False
5 points
Question 14
According to the 1st Law of Thermodynamics, disorder always increases.
True
False
5 points
Question 15
In 5 billion years the Sun will expand and burn up the Earth.
True
False
5 points
Question 16
Einstein stated that World War 4 will be fought with sticks and stones.
True
False
5 points
Question 17
Which is not true of the First Law of Thermodynamics?
Energy cannot be created | ||
Energy cannot be destroyed. | ||
Energy can change forms. | ||
All are true. |
5 points
Question 18
According to the Second Law of Thermodynamics, the heat death of the universe is its ultimate fate.
True
False
5 points
Question 19
Which is organic?
CH4 | ||
CO2 | ||
H2O | ||
N2 |
5 points
Question 20
The Sun and the core are the primary energy sources for the Earth.
True
False