Which of these terms identities the organisms that perform photosynthesis in an ecosystem?
A. Secondary consumers
B. Carnivores
C. Primary consumers
D. Producers
SUBMIT

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna