The scientific method includes all of the following EXCEPT:
a hypothesis conclusions. an observation. a testable theory. experimentation.
Which of the following is/are characteristic of living organisms?
have membrane bound organelles ability to produce energy eat other organisms have a nucleus maintenance of homeostasis
maintenance of homeostasis
Adaptations include all of the following EXCEPT:
innate migratory behavior of young birds born in the Arctic. reduced heart rate and oxygen consumption in seals that dive deep for long periods of time. enlarged leg muscles in horses, in response to pulling heavy wagon loads. larger body size in male gorillas, which fight over females.
enlarged leg muscles in horses, in response to pulling heavy wagon loads.
Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. Which of the following was his hypothesis?
The bacteria changed their DNA when growing near the mold. The mold was dead. The mold produced a substance that killed nearby bacteria. The mold used all of the nutrients so that the bacteria couldn't grow.
The mold produced a substance that killed nearby bacteria.
A basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell:
lacks DNA. is considerably larger. possesses membrane-bound organelles. lacks a nucleus. is structurally more complex.