Which of the following organisms would you expect

to find preserved as a fossil?
a. a jellyfish
b. a shelled arthropod such as a trilobite
c. an earthworm
d. a nematode
e. a protistan such as an amoeba


Answer: b

Biology & Microbiology

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Human milk contains _____

a. calcium only b. antibodies only c. calcium and protein, but not antibodies d. sugar and calcium, but not protein e. calcium, antibodies, sugar, and protein

Biology & Microbiology

Scientists have documented that spring seasons starting earlier due to climate change have resulted in some caterpillar species beginning their maturation stage earlier than normal

There are bird species that need the caterpillars to feed their chicks. However, since the caterpillars are maturing before the chicks hatch (and therefore cannot be used for chick food), the birds are experiencing a drop in their lifetime reproductive success. Interestingly, scientists have also documented that the individual birds that are best able to change when they lay their eggs to align with earlier spring seasons have the greatest lifetime reproductive success. These phenomena are examples of ________. A) an evolutionary response to climate change B) an increase in global greenhouse gas emissions due to climate change C) a change in species distribution due to climate change D) the effects of terrestrial biome distribution due to climate change

Biology & Microbiology

Darwin and Wallace were the first to propose _____

A) that evolution occurs B) a mechanism for how evolution occurs C) that Earth is older than a few thousand years D) natural selection as the mechanism of evolution

Biology & Microbiology

In early spring 2009, the CDC reported several dozen cases of novel H1N1 influenza ("swine flu") in the United States. By the end of the year millions of people had been infected. The pattern of novel H1N1 cases in the United States represents a(n) ________ disease.

A. epidemic B. endemic C. sporadic D. pandemic E. opportunistic

Biology & Microbiology