The difference between an artery and a vein is that arteries are larger, more muscular and more elastic than veins; they carry blood that is under pressure from having been pumped out of the heart; veins are under much less pressure, so they are not as strong
The answer is four bonds because they can use one electron for each bond.
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Answer:
When wolves were removed from the habitat, the elk thrived, causing a population increase. more elk means an increase in the need for food. The leaves of an aspen tree make good food for elk causing over-grazing and soon, the "aspen trees will be eaten out."
Explanation:
Needles.
Sharing needles or things that you can eject through your skin (ex. drugs)
Infected tattoo needle that wasn't cleaned and disinfected properly
Answer:
The young birds are hosts for the larvae.
Explanation:
A host is an organism that harbours the invertebrate or microorganism and experiences disease. The disease that the larvae are causing is threatening the population of birds.
