BIOL207 Lecture 19: b207lect19_1 copy.pdf
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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. |