Which of the following might trigger erythropoiesis?

a) an increased number of RBCs

b) hypoxia of EPO-producing cells

c) moving to a lower altitude

d) decreased tissue demand for oxygen

Give that the half-life of the radioisotope carbon - 14 is 5730 years, how useful do you think this this isotope would be for dating bones that are over a million years old?

Which statement is true of BOTH the sodium potassium pump (a type of active transport) and facilitated diffusion? Both involve proteins in the cell membrane. Both move materials from high concentration to low concentration. Both require ATP.

Which statement best describes a characteristic of a scientific theory? Supported by mathematics to explain a principle of nature A readily demonstrable fact, which cannot be disproven An educated guess that can be consistently testable Supported by

What evidence must be considered when determining whether or not a trait is an adaptation? (site 1)

Post-thyroidectomy, a person develops muscle spasms, increased deep tendon reflexes, and laryngeal spasm. the most likely cause of these findings is:

In this food chain energy moves from one living thing to another. What source of energy starts this food chain?

1) Research the history of terrariums. Find out who developed the first terrarium. What did this particular scientist want to study? 2) What are the two different types of terrariums?

Lab report mouse genetics one trait

How do scientist develop scientific explanations about subjects that are impossible to study through controlled experiments?

Is Bacteria and Bcaterium is same ...