Sexual dimorphism is most often a result of
A) pansexual selection.
B) stabilizing selection.
C) intrasexual selection.
D) intersexual selection.
E) artificial selection.
Ans: D) intersexual selection.
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Ice floats in liquid water because there are, on average, fewer hydrogen bonds between molecules in ice than water,
resulting in a lower density.
Indicate whether the statement is true or false.Metabolic fingerprinting could be used ____
a. to determine the structure of a metabolite b. to compare the metabolic differences between healthy and disease cells c. to decipher the mRNA sequence of a metabolic enzyme d. to identify the sequence of a metabolic gene e. for paternity testing
Biologists sometimes damage ecosystems in order to study them. For example, researchers have fogged rainforest
trees with insecticides to search for undiscovered species that fall to the ground when poisoned. Others have deliberately added phosphates to natural lakes to study the eutrophication process. What is your ethical position on such studies? Should they be banned, or is the knowledge gained worth the harm they cause?
What will be an ideal response?All of the following are important to the theory of evolution EXCEPT
A) variation in traits within an entire population. B) inheritance of traits. C) changes in individuals within their lifetimes. D) environmental change. E) mutations.