Compared to other muscle tissues, cardiac muscle has more ________ but less ________
a. glycogen / ATP
b. adipose tissue / ATP
c. nuclei per cell / striations
d. mitochondria / glycogen
d
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Parasitic species tend to have simple morphologies. Which of the following statements best explains this observation?
A) Parasites are lower organisms, and this is why they have simple morphologies. B) Parasites do not live long enough to inherit acquired characteristics. C) Simple morphologies convey some advantage in most parasites. D) Parasites have not yet had time to progress, because they are young evolutionarily.
Approximately 3.5 million years ago the Isthmus of Panama formed. This new landmass severed the connection between the Pacific Ocean and the Caribbean Sea. An ancestral fish population (porkfish) was split in two by this event; the two populations no longer interbreed and are two distinct species. This type of speciation is called
A. allopatric speciation. B. parapatric speciation. C. hybridization. D. sympatric speciation. E. sexual selection due to ecological variation.
We know that the anthropogenic production of CO2 represents the single largest contributor to the greenhouse effect. What is another greenhouse gas that is also increasing as the result of human activities?
A) methane B) nitrogen oxides C) chlorinated hydrocarbons D) ozone E) all of the above
Which of the following infectious particles do NOT have protein in their structure?
A) bacteriophages B) prions C) animal viruses D) viroids E) both prions and viroids