North America is currently experiencing an unprecedented and rapid loss of species. What is believed to be the main trigger of such events, either directly or indirectly?
A) continental drift
B) increased human population
C) climate change
D) increased predation by wild carnivores
B
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A distinguishing feature of Lepidosauria is their:
A. hard shell B. kinetic skull C. external fertilization D. shell-less eggs E. none of the choices provided
An example of an echinoderm is a ________.
What will be an ideal response?
Features of the fungi as a group include which of the following?
A. Presence of chitin in the cell wall B. Presence of ergosterol in the cell membrane C. Reproduction by means of spores, either asexually or sexually D. All of the above are correct E. Heterotrophic nature
Which of the following is considered dangerously underweight?
A. A BMI of 15.5 or lower B. A BMI of 18.5 or lower C. A BMI of 25 or lower D. A BMI of 29.9 or lower E. A BMI of 40 or lower