Acid rain can be caused by factors and there chemicals in the air
Acid rain effects- getting into our under ground waters, the animals might get sick from the acid rain, fish might die, animal health, and human health when it gets in our drinking water
Acid rain-meaning that it has elevated levels of hydrogen ions. is a rain or any other form of precipitation that is unusually acidic.
Hope this helps have a nice day

5 0

3 years ago

A scientist finds a fossil that she thinks might make a good index fossil.

Mekhanik [1.2K]

Answer:

An index fossil is also known as guide fossils or indicator fossil. They are fossils used to determine and identify geologic periods.

The main characteristics of an index fossil include :

1.It must be distinctive.

2.It must be widespread.

3. It must be abundant

4. It must be limited in geologic time.

Due to trends and studies of most fossil-bearing rocks being formed in the ocean, the major index fossils are mostly marine animal or plant organisms.

6 0

3 years ago

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What is a fixed allele

Oksana_A [137]

A fixed allele is an allele that is the only variant that exists for that gene in all the population

8 0

3 years ago

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