Colour of the blood of a snail

A new EMT asks you why the elderly are at a higher risk for developing pneumonia, as compared to younger individuals. You inform him that one reason the elderly are more susceptible to respiratory infections because of a (n) :

What is the gastrointestinal system? What does it do?

One organism benefits while the other is killed.

Which water source becomes polluted as it travels over the earth? ponds groundwater oceans O runoff

Which statement best describes how a tree and a mouse get the glucose they need as a source of energy A) Both a tree and a mouse get glucose indirectly from other living thing B) A tree makes glucose using the suns energy, and a mouse gets glucose

Explain wether nitrogen atoms will form bonds with other atoms

What are examples of radio waves

In a population of spiders there are three different sizes: small, medium, and large. - --The large spiders are easily seen by predators. - --Small spiders have a difficult time finding food.

what is one type of new constellation that edmond halley saw in the sky while he was on the island of st. helena

Global winds and ocean currents are not related to and do not affect climates true or false? and why