Why might variation in guppy coloration have developed as a trait?

Explain, physiologically, why the ERV and IRV are lower during heavy exercise than they are during moderate exercise.

How do organisms return nutrients and water to the environment

Students in a high school Marine Science class are learning about the scientific process. Four students were asked to write a testable prediction about the movement of ocean currents. Their responses are shown in the chart.

As a plant grows, the stem often becomes thickened and somewhat woody since it is responsible for supporting the upper branches and leaves. Cells in this area of the plant develop a. many mitochondria. b. extra chloroplasts. c. thickened cell walls.

Ryan was born genetically male but has external genitals that are completely female. he would be referred to as

If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis? and can u explain because i dont understand

A lab technician runs the results of a simple PCR reaction through a gel electrophoresis to test a sample of imported hamburger meat for the presence of a DNA sequence that is known to be found in kangaroos and not in cows.

If Earth was not titted on its axis, what changes would you expect to see in the seasons?

Why are organelle important for cell homeostasis

In what way does the cerebellum coordinate and "fine tune" skeletal muscle movements? Check all that apply. It consciously coordinates minute muscle movements. It consciously coordinates minute muscle movements.