Which of the following processes occurs in G1 phase of the cell cycle?
A.) the cells grow in size and content producing mainly carbohydrates and
membranes.
B.) DNA is copied.
C.) the cells grow in size and content producing mainly proteins.
D.) mitosis and cytokinesis.

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?