Modern restoration biologists recognize that it may not be prudent to restore the same species to an ecosystem that has been disturbed. Which of the following statements and or explanations supports this?
A. Restoring an ecosystem should involve rebuilding the systems that allowed the habitat to successfully operate.
B. Restoring an ecosystem requires a replica of the original state, this version of restoration is called "pristine."
C. Due to global warming certain species may no longer flourish in the ecosystem.
D. Often we do not have a full list of species that made up the original ecosystem.
Answer: D
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In the Morse code, a series of dots and dashes code for letters of the alphabet. How is this analogous to the genetic code?
A) There is complementarity in the genetic code (A is complementary to T, and C is complementary to G). B) The bases that make up DNA are coded by the sugar-phosphate backbone. C) The machinery involved in DNA synthesis is analogous to the telegraph equipment used in sending Morse code. D) The bases of DNA code for the more complex amino acid sequence of the proteins in cells.
To control pathogenic and disease-causing organisms, spices can be fumigated using ________.
A. ammonium gas B. chlorine gas C. heavy metals D. ethylene oxide
The process of a high-energy "donor" molecule physically transferring a phosphate group to ADP is called
A. substrate-level phosphorylation. B. glycolysis. C. oxidative phosphorylation. D. photosynthesis. E. electron transport.
The HIV virus can take over much of the cell's machinery to produce many copies of the virus. Two classes of drugs that have been effective against HIV are base analogs (e.g., AZT) and protease inhibitors. How do these work to slow or stop HIV replication? What other steps in the HIV life cycle might be targets for drug development? What else can be done to try to stop the spread of HIV?
What will be an ideal response?