Use the drop-down menus to complete the statements. Each organism in a population produces more offspring than can survive. This is called
.

In order for natural selection to occur, populations must have
.

When the environment changes, nature selects favorable
. Over time, these
in a population.

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.