Which was a possible source of high energy on early Earth that likely contributed to the origin of life?

a. redox energy
b. gamma radiation
c. volcanic activity
d. infrared radiation
e. geothermal energy


c

Biology & Microbiology

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Amylase has specific active sites for which type of molecule?

a. carbohydrates b. proteins c. lipids d. amino acids

Biology & Microbiology

What biosafety level is required when working with Staphylococcus aureus and Streptococcus pyogenes?

A. 3 B. 1 C. 2 D. 4

Biology & Microbiology

The two brain hemispheres are connected via what structure?

a. thalamus b. basal ganglia c. corpus callosum d. amygdala

Biology & Microbiology

Consider the following segment of a food web: Snails and grasshoppers eat pepper plants; spiders eat grasshoppers; shrews eat snails and spiders; and owls eat shrews. The shrew occupies the trophic level(s) of __________.

a. primary consumer b. secondary consumer c. tertiary consumer d. primary and secondary consumer e. secondary and tertiary consumer

Biology & Microbiology