C) The Earth is at least three billion years old. :)
<span>Human height is a qualitative complex traits that is measured on a continuous scale.</span><span>
Genetic variation can not always determine the differences in a given trait between individuals because the </span>phenotype cannot always<span> be </span>determined without knowing the environment. Both conditions are required and must be presented in order to see a phenotype.
The best answer among the choices given is option D. Both growth and reproduction is the <span>characteristic of living things that is important to the survival of a group of animals rather than an individual member of this group. These two are very important in order for the survival of all the living things on Earth. Without these things, life here on Earth will end.</span>
The answer is facilitated diffusion. Facilitated diffusion happens when there is a
carried changing the cell membrane so the nutrients can pass through. During facilitated diffusion, the absorbed
nutrients such as water soluble vitamins need a specific carrier to transport
the to the cell membrane.