In many areas of the world, humans are destroying habitats at an alarming rate. Why is habitat destruction so dangerous?
What will be an ideal response?
Destruction of habitat can remove the homes of many animals and plants. As some animals and plants die off, this affects the entire ecosystem since there is an interdependency of all plants and animals within the habitat. Also, feeding and nesting sites can be lost. These events can lead to extinction of species.
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You discover a bacteria species in a deep ocean sample that can turn olive oil into pure gold. The bacteria do not replicate well at sea level, and one night all of your "Golden" bacteria die. What can you do to possibly retrieve the gold-making gene from the dead Golden bacteria?
A. Transform a live bacterial strain with the Golden bacteria's DNA. B. Transduce a live bacterial strain with the Golden bacteria's DNA. C. Conjugate a live bacterial strain with the Golden bacteria. D. Transduce the Golden bacteria and then infect a live strain of bacteria with the transducing virus. E. There is nothing you can do because the cells are dead. You will have to search the ocean and hope to find the elusive bacteria again.
A response to change in the internal/external environment that adds to the change is called
a. positive feedback. b. physiological feedback. c. reflex feedback. d. negative feedback. e. anatomical feedback.
What organisms convert gaseous nitrogen into ammonium or nitrates that can be used by plants?
a. tertiary consumers b. nitrogen-fixing bacteria c. fish d. legumes e. corn and other grains
Crossing-over alters the composition of chromosomes and results in new combinations of alleles being channeled into the daughter cells
1.True 2.False