Ecosystem ecology is primarily concerned with
A. ecosystem stability.
B. species interactions in various types of ecosystems.
C. the synthesis of nutrients.
D. patterns of species diversity within ecosystems.
E. movement of energy and materials through organisms and their communities.
E. movement of energy and materials through organisms and their communities.
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Which of the following is an example of potential rather than kinetic energy?
A) the muscle contractions of a person mowing grass B) water rushing over Niagara Falls C) light flashes emitted by a firefly D) a molecule of glucose E) a crawling beetle foraging for food
The following are steps in using SSU rRNA molecules to develop phylogenetic trees. Place these steps in the correct order. _____ Count the number of nucleotide differences between each pair of sequences and calculate the evolutionary distance._____ Input data into computer and use appropriate software to construct a phylogenetic tree._____ Align nucleotide sequences to compare._____ Isolate DNA from cells of each organism being tested._____ Amplify the DNA of the SSU rRNA genes of each organism using polymerase chain reaction._____ Determine the nucleotide sequence of the SSU rRNA genes of each organism.
Fill in the blank(s) with the appropriate word(s).
There are no mandatory screening programs for genetic defects such as PKU and galactosemia in
newborns Indicate whether the statement is true or false.
Which factor may result in the actual carrying capacity of our planet being lower than initially calculated?
A) The average American uses more resources than someone from another country. B) Modern food production relies on nonrenewable resources. C) NPP has been decreasing. D) The human population is growing much faster than was previously thought.