We should never keep volatile solvents, like as ether, acetone, or benzene in an open beaker or erlenmeyer flask because vapors can ignite and flash back if they reach a flame. all but one safety precaution is necessary when using volatile solvents. that is

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.

Some plants release toxic chemicals that kill or harm nearby plants. what type of example is this? 1 cooperation 2.mutualism 3.competition or 4.parasitism