Which statement about the connection between subcellular and extracellular components is the most correct? A. Gap junctions are necessary for communication and growing embryos and tissues, such as heart muscle. B. Desmosomes are necessary for communication and tissues, such as muscle cells. C. Tight junctions are bound together by specific keratin proteins. D. Plasmadesmata are typically found interspersed within the cell walls of many types of bacteria.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

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?

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?