The diffusion of oxygen gas across the cell membrane always occurs -
a with the assistance of cellular energy in the form of atp
b along the concentration gradient of the oxygen gas
c from an area of lower concentration to an area of higher concentration
d at the same rate as the diffusion of carbon dioxide gas

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down