Which organ is essential in circulating oxygen throughout the body?

a. liver

b. heart

c. lung

d. kidney

What are the cells in the skin called that make hair? columnar epithelium cuboidal epithelium keratinocytes Award for why is so

One example of diffusion in the human body is ...

What are the bases of mrna coded for by this section of dna before the mutation

Some Individuals produce more offspring than others. Which term describes this observation?

You have just finished building a prototype of a race car that is powered by a hydrogen fuel cell. What is the next step in the design process? A) You should test the prototype to see how it performs.

Mendel's observations of pea plants contributed to the study of modern genetics. use these terms gene, genotype, dominant, recessive, phenotype, allele, trait, in your explanation?

What is the process of the ocean floor adds new material to its ocean floor called?

If you were in a boat as Hurricane Sandy passed overhead on October 28 at 4am, at what altitude would Polaris appear in the sky from your location (32°N and 73°W) ?

Which instrument would provide the most detailed information about the internal structure of a chloroplast

Staind yeast were added to a paramecium culture, and some of the yeast were ingested by the paramecia. this activity is most closely associated with which life function A) synthesis B) regulation C) nutrition D) growth