Answer:1.) solute too large for channels
2.) solute not lipid soluble
3.) solute not able to move down concentration gradient.
The correct answer is A. Cell growth increases both toward the beginning
and the end of the healing process. At the beginning, when a wound is
inflicted, the body creates numerous cells that are designed to fight
any pathogens that might want to enter our body, as well as create extra
cells to seal up the wound. At the end, scar tissue is formed as the
wound closes which is more tissue than there was before the wound.
Each cell expresses, or turns on, only a fraction of its genes. The rest of the genes are repressed, or turned off.
The turned on genes are then first transcribed into messenger RNA by the process of Transcription.
Then the mRNA is Translated into protein by the process called Translation.
This is how the specific genes are expressed.
The answer is D. The natural selection is a theory which illustrates the gradual process of evolution in the population due to the change of environment. The key point is the mutation (variation) exists in the population before the environment changing. For C, if the environment does not change, though the adaptation is useful to environment, it will not be selected. Because the organisms without the adaptation will not die.
