Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.
Answer the following statement true (T) or false (F)
True
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Roots contain starch-heavy plastids known as:
A. chloroplasts B. plastoplasts C. chromoplasts D. statoliths E. strongoliths
Answer the following statements true (T) or false (F)
1. Protists are only capable of asexual reproduction. 2. DNA analysis shows that fungi are more genetically related to plants than animals. 3. As plants evolved to grow taller, their stems had to become more rigid. 4. Plants exhibit a final body form, like animals, which they keep until they die. 5. All fruits are derived from the ovary of an angiosperm.
Before they enter the blood stream, what
modification occurs to erythrocytes?
a. they are loaded with ant-bacterial compounds b. they lose their nucleus and other organelles c. they absorb oxygen and release carbon dioxide d. they are wrapped in a double plasma membrane e. they absorb nutrients and expel wastes
Imagine that a random mutation results in a bacterial cell gaining the ability to grow in an environment with a salt concentration of 13%. The population this mutated cell arose from is growing in an environment with a salt concentration of 1.0%. Over the next 3 weeks the salt concentration of the environment fluctuates between 0.9% and 1.0%. What would you predict might happen to the population over these three weeks?
A) In this example the ability to grow in an increased salt concentration provided the mutated cell with a distinct advantage, therefore the mutated cell was selected for and it began to dominate over the three week period. B) In this example the ability to grow in an increased salt concentration did not provide the mutated cell with any advantage, it was not selected for and did not dominate the population over the three week period.