C. Genetic variation
Bacteria are very numerous, and random mutation of bacterial DNA generates a wide variety of change, including resistance. It happens through mutation and selection. Not only are they capable of sharing genetic bits of DNA to related and unrealted species they can develop ways to remove the antibiotic before it reaches its intended area via biochemical pumps or enzymes to inactiavte the antibiotic.
The first one because ladybugs r apart of the environment and r helping to keep aphids under control
Please mark brainliest
When injected, benzedrine, dexedrine, and methamphetamine increase the release of serotonin, norepinephrine, and dopamine in the brain. Benzedrine, dexedrine, and methamphetamine are examples of amphetamines. They are stimulants, which speed up the messages travelling between the brain and the body. They may be used to treat attention deficit hyperactivity disorder.
There are 72 choir members. This is 24 times 3 = 72. We need to do this operation to find how many people there are in total. It's a bit confusing to explain, but if you need more help, just tell me! Once you get better, you'll understand when to multiply. I hope this helps! :D
