Question

can you answer these

Which is most likely a source of air pollution?
littering
CFCs
oil spill
runoff

When comparing dogs to wolves, scientists found evidence that supports the idea they come from a common ancestor. Which combination of evidence would most strongly support this idea?
comparable anatomies, fossils, and behavior
different anatomies, similar development, and different DNA
comparable anatomies, similar development, and similar DNA
different anatomies, fossils, and behavior

A Russian citizen has illegally obtained a Siberian tiger and is trying to sell the tiger’s fur in the United States. What treaty does this violate?
Tiger Treaty
Lacey Treaty
CITES
EPA

A scientist measured an increase in nitrous oxide in the atmosphere. This increase would result in
an increase in the greenhouse effect.
a decrease in the greenhouse effect.
no change in the greenhouse effect.
a stabilization of the greenhouse effect.

Why is water considered to be abiotic?
because it is not part of the biosphere
because it came from something living
because it is dead
because it is not living and never lived

Answer 1

1) CFCs — they are airborne chemicals that damage the ozone layer and act as air pollutants.

2) comparable anatomies, similar development, and similar DNA — matching morphology, development, and genetics most strongly support common ancestry.

3) CITES — the Convention on International Trade in Endangered Species regulates international trade in protected species like Siberian tigers.

4) an increase in the greenhouse effect — nitrous oxide is a greenhouse gas, so more of it strengthens the greenhouse effect.

5) because it is not living and never lived — water is abiotic because it is a nonliving part of an ecosystem.