Plz i'm desperate! why are all people on earth members of the same biological species?
a. all people have the same genetic makeup.
b. all people originated from the continent of africa.
c. all people have adaptions that allow them to live anywhere on earth.
d. all people can mate with one another and have children.

Which transition by an electron will release the greatest amount of energy? oa ob oc od

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

What is the measurement of how fast an object moves relative to a reference point?