Thermal burns are MOST commonly caused by exposure to:
A) hot liquids.
B) hot solid objects.
C) an open flame.
D) superheated steam.
Answer: C) an open flame.
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Which environment would be most likely to produce trees without annual rings?
a. tropical rain forest b. northern evergreen forest c. areas with alternating wet and dry seasons d. temperate-deciduous forests e. annual rings are characteristic of all trees
________ is the perennially frozen subsurface that develops in boreal and arctic systems where the ground temperatures remain below 0°C for extended periods of time
Fill in the blank(s) with correct word
What happens when an action potential arrives at an axon terminal?
A. Membrane voltages stimulate the axon. B. Sodium ions are pumped out of the cell. C. A neurotransmitter builds up so it can be used again. D. The action potential causes an influx of phosphorous ions. E. Chemicals relay the message at a synapse.
Which of the following microbes produces a protein that kills a variety of insect pests?
A) Pseudomonas B) Haemophilus influenzae C) Bacillus thuringiensis D) Thermus aquaticus E) Plasmodium falciparum