Why does sodium react so easily with chloride to make sodium chloride?
A. Both atoms have incomplete outer orbitals and they complete each other's when they combine
B. Sodium chloride is table salt, one of the most reactive molecules in living things.
C. Opposites attract.
D. Both atoms have outermost shells full of electrons.
E. Sodium chloride is highly explosive.
What is meant by the statement âlife is diverse?â
A. There are many living organisms on Earth
B. Each living thing is a unique individual.
C. All living things are related to each other.
D. There are many different kinds of living organisms on Earth
E. There are many places to live on Earth.
What is considered the fundamental unit of life?
A. DNA
B. Carbohydrates
C. A molecule
D. Nucleic acid
E. A cell
In evolution, why is it important that individuals vary from each other?
A. Variation allows some individuals to do better than others, so those variations are selected for.
B. If variations or mutations are extreme enough, new species can result.
C. Variations are important because individuals have to change through time.
D. Variations are important because they're inherited.
E. Variation gives every individual an equal chance of surviving so they can be selected for.
If every species on Earth came from some other species, if you look backwards in time, what is the logical conclusion?
A. Species do not change through time.
B. All species are unique.
C. Species cannot adapt to environmental changes.
D. All species will eventually go extinct.
E. All species are related.
Why does sodium react so easily with chloride to make sodium chloride?
| A. | Both atoms have incomplete outer orbitals and they complete each other's when they combine | |
| B. | Sodium chloride is table salt, one of the most reactive molecules in living things. | |
| C. | Opposites attract. | |
| D. | Both atoms have outermost shells full of electrons. | |
| E. | Sodium chloride is highly explosive. |
What is meant by the statement âlife is diverse?â
| A. | There are many living organisms on Earth | |
| B. | Each living thing is a unique individual. | |
| C. | All living things are related to each other. | |
| D. | There are many different kinds of living organisms on Earth | |
| E. | There are many places to live on Earth. |
What is considered the fundamental unit of life?
| A. | DNA | |
| B. | Carbohydrates | |
| C. | A molecule | |
| D. | Nucleic acid | |
| E. | A cell |
In evolution, why is it important that individuals vary from each other?
| A. | Variation allows some individuals to do better than others, so those variations are selected for. | |
| B. | If variations or mutations are extreme enough, new species can result. | |
| C. | Variations are important because individuals have to change through time. | |
| D. | Variations are important because they're inherited. | |
| E. | Variation gives every individual an equal chance of surviving so they can be selected for. |
If every species on Earth came from some other species, if you look backwards in time, what is the logical conclusion?
| A. | Species do not change through time. | |
| B. | All species are unique. | |
| C. | Species cannot adapt to environmental changes. | |
| D. | All species will eventually go extinct. | |
| E. | All species are related. |
Related textbook solutions
Related questions
As entropy increases there will be more useful energy to doâworkâ. True or false?
False. As entropy increases, there will generally be less usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. Imagine a car motor, which attempts toturn chemical potential energy into kinetic energy (movement). Lessefficient motors will get hotter for the same amount of fuelconsumed. When you drive a car you hope that most of the fuelenergy is converted into kinetic energy and not lost as heat(entropy). The hotter the car (and thus the more entropy) the lessefficient the ability to do âworkâ (the moving of the vehicle). |
| True. As entropy increases, there will generally be more usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. In most biological and mechanicalsystems it is heat energy which is captured to do useful 'work'.Heat energy, the random movement of molecules, and increases inentropy are central to doing useful work. |
Biological systems sometimes appear on the surface to break theSecond Law of Thermodynamics â by seemingly increasing the order inthe overall system. They donât. Why?
| a. Earth (and living things on it) are not a closed system. Thesun's constant input of energy in the form of photons is harnessedby living things to create internal order within themselves. Butwithout such a constant input of energy, most biological systems onearth would break down. |
| b. The Second Law tells us that no natural process can occurunless it is also associated with an increase in the entropy of theuniverse. A living organism (such as an animal or plant) brings inmatter and energy from its environment and uses this to creategreater order within its body: the processes of life. But it isimportant to keep in mind that all animals and plants are also partof a larger system of the environment around them. While creating asmall âpocketâ of order, the processes of life (metabolism,movement, etc..) releases heat into the environment â thusincreasing the entropy of the universe and following the2nd law. |
| c. Living things, by harnessing energy to create order (withinand around themselves) actually create a paradox in questionssurrounding the first and second laws of thermodynamics andseemingly violate many previously held assumptions. |
| d. Both a and b above are correct. |
When plants capture energy in the photons of sunlight andconvert that energy into the chemical bonds of organic molecules,are they creating new energy?
| No, the energy is being transferred from one form into another.But no new energy is being created. |
| No, the overall total energy is decreasing over time. |
| Yes, by capturing photons, the plants are creating newenergy. |
| Yes, by capturing photons, the plants are creating new energy -of a different wavelength. |
