Which statements describe long-term environmental changes? check all that apply. they occur in minutes or within hundreds of years. they occur in thousands of years or within billions of years. they affect populations and species more slowly than short-term changes. they have an immediate impact on living things. they can affect the dna of living things over time.

They occur in thousands of years or within billions of years.

They affect populations and species more slowly than short-term changes.

They can affect the DNA of living things over time.

Explanation:

A long term environmental change is the change which exerts it's impact for a long time period about billions of years. It leads to the destruction of the environment at a slow or rapid pace. It makes the environment unsuitable for the survival of the living beings. The living beings either adapt to the change or they may migrate to new locations or they may extinct. The changes in the environment brings drastic changes in the morphology, physiology and genome of the living organisms.

On the basis of the above explanation, the following are the correct options:

They occur in thousands of years or within billions of years.

They affect populations and species more slowly than short-term changes.

They can affect the DNA of living things over time.

let that person have a turn to speak : )

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.