Which of the following statements about steroid hormones is true? They are lipids that bind to receptors on the plasma membrane.

They are proteins that bind to receptors on the plasma membrane.

They are proteins that enter the cell and bind to receptors on the nucleus.

They are lipids that enter the cell and bind to receptors on the nucleus

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

Nucleic acids offer variability because they contain alternate forms of genes called .