If extinction is a natural process that occurs on an ongoing basis, how do extinctions occurring now differ from those of any other mass extinction periods?
What will be an ideal response?
Unlike most previous mass extinctions, the current mass extinction is not the inevitable result of a physical catastrophe such as a volcanic eruption or asteroid impact. Humans are the driving force behind the current rise in extinctions and our actions will determine the extent of the losses.
You might also like to view...
Which of the following statements is true regarding steroid hormones? Select all correct choices
A. They are hydrophilic B. They are hydrophobic C. They have structures similar to cholesterol D. They are composed of single aromatic amino acids E. They bind to cell surface receptors F. They bind to cytoplasmic receptors
Knowledge of silencing genes provided scientists with clues to the expression of what characteristic in flowers such as petunia?
A. number of flower parts B. placement of flower parts C. color expression D. vitamin deficiencies E. time of flowering
How many subunits make up a functional ribosome?
a. 1 b. 2 c. 3 d. 4
What term is used to describe bacteria that can only live in the absence of oxygen?
a. aerobes b. anaerobes c. oxyphiles d. oxyphobes e. methanogens