You are comparing three species (a, b, and c)
and you face a dilemma. morphologically, species a
and b are very similar, but they are both diff erent from
species c. however, you have sequenced some genes in
all three and the gene sequences indicate a high degree
of similarity between species b and c. how would you
resolve this situation?

The species A and B are analogous species and the species B and C are homologous species.

Explanation:

Analogous species are the species with similar morphology but different anatomy or the line of evolution.

Homologous species are the species having similar anatomy but different morphological features due to similar line of evolution.

Although morphologically similar, B and C share different lines of evolution. But A and B share same line of evolution. So they are homologous species even when they are morphologically different.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!