The mass extinction at the end of the Cretaceous period was likely the result of:
a. rising seawater.
b. loss of vegetation.
c. extreme predation.
d. a dramatic change in climate.
e. the appearance of new competitors.
d
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Knowledge of a pathogen's genome is useful because:
A. It allows scientists to cause mutations in the DNA thereby killing the pathogen. B. It allows scientists to prevent meiosis and the duplication of genes necessary for the survival of the pathogen. C. It allows developing drugs that make antibodies against the pathogen. D. It allows developing drugs that target metabolic pathways unique to the pathogen. E. none of the choices provided
If all the individuals in the threatened population die, this would be described as __________
a. extinction b. local extinction c. mass extinction d. adaptation
The ____________ of a comet can be up to a million kilometers in diameter
Fill in the blank(s) with correct word
It is often said that development is a two-step process. Which two steps are likely to be referred to here?
What will be an ideal response?