In this simulation, how is respiration rate being measured?
a. CO2 production
b. CO2 consumption
c. O2 production
d. O2 consumption
a
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Membranes of thermophilic bacteria are stabilized by phospholipids with
A. fatty acids that tend to be more saturated. B. All of the choices are correct. C. fatty acids that have more double bonds. D. fatty acids that have lower molecular weights.
If a student was not being careful to pipette up and down several times between dilutions, (added the 1 mL of milk to the 1:10 sample, then withdrew 1 mL from the 1:10 sample and added it to the 1:100 dilution, then withdrew 1 mL from the 1:100 sample and added it to the 1:1000 dilution), what effect would that have on the dilutions being prepared?
A) The number of organisms per dilution would be artificially high B) The number of organisms per dilution would be artificially low
How are negative stains different from other types of stains?
a. They stain the desired structure or specimen black. b. They stain more than one type of specimen. c. They stain the background, leaving the cells colorless.
An atom can be changed into an ion by adding or removing:
A) a neutron. B) a proton. C) an electron. D) either a neutron or a proton. E) either a proton or an electron.