Choose all the answers that apply. Which of these statements are true?
A hypothesis is the conclusion of an experiment.
Observation is usually the first step in scientific method.
Dependent and independent variables are the same in an experiment.
Scientists try to understand the phenomena that occur in the environment.
Bias is a judgment that is not based on fact.

Identifying the elements of hypothesis-based science this experiment is an example of hypothesis-based science. what question did the researchers ask? what question did the researchers ask? can predation result in selection for color patterns in guppies? do female guppies prefer to mate with males with bright color patterns or drab colors? do male guppies in pools with pike-cichlid fish have brighter color patterns than females in the pool? do killifish prefer to prey on juvenile guppies or adult guppies?

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.

Which of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis