Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Ur welcome
This is known as the Norm of Universalism. There are four scientific norms that apply to the pursuit of science. The other three are the Norm of Organized Skepticism which states that no scientific theory or finding is immune to questioning, the Norm of Communalism which states that all scientific knowledge should be made available to everyone and the Norm of Disinterestedness which states that scientists should seek truth not personal gain.
Answer:
Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment.
Explanation:
he outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth's solid inner core and below the mantle. Its outer boundary is 2,890 km (1,800 mi) beneath the Earth's surface.
The answer to number 3 is d.
