The layers of earth's atmosphere are separated by which of the following?

cloud bands
changes in temperature trends
sudden differences in air pressure

layers in earth's atmosphere are defined as regions in which

air mixes together
planes cruise due to jet stream currents
the temperature of the air remains the same

in which layers does the temperature of the atmosphere increase with altitude? select all that apply.
troposphere
stratosphere
mesosphere
thermosphere
exosphere

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

How much does one sucrose molecule weigh in grams?