What is a "cloning vector"?
A) a cell that is producing protein from a recombinant plasmid
B) a protein such as HGH that is produced by biotechnology
C) an enzyme used to cut or combine DNA
D) a DNA vehicle that carries recombinant DNA into cells
Answer: D
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Fishing by humans has severely affected populations of many different marine species, including whales. Examine the figure above, making sure to note what each axis represents. What can best explain the pattern for minke whales?
A. Minke whale populations were overfished in the early 1900s, then recovered in the 1970s as their competitors were killed off.
B. Minke whales are a new species that evolved during the 1960s as an ecological niche opened up.
C. Commercial whalers did not pursue minke whales until the more valuable whale species had declined.
D. Minke whales were too fast to catch until they become malnourished due to exploitation competition by other whales.
Which of the following is NOT a description of sustainability?
a. sustainability means managing resource use today to ensure a vibrant and successful future for others b. sustainability means living in a way that resource use does not exceed the biocapacity of Earth c. the concept of sustainability means different things to different people and can be difficult to define and measure d. sustainability is a concept that only applies to the actions of tree huggers or environmentalists e. sustainability describes the ways humans use Earth's resources
What is the exchange of gases between the atmosphere and the blood through the alveoli called?
a) external respiration b) internal respiration c) inhalation d) cellular respiration
Calcium ions are commonly stored in the __________ of the muscle cell
a. axon b. myosin c. sarcoplasm d. sarcoplasmic reticulum e. T tubules