Answer:
A. through proteins embedded in the membrane that "recognize" specific substrates and allow their passage.
Explanation:
Some of the membrane proteins serve as transport proteins. These transport proteins can serve as channels, carriers or pumps and allow facilitated diffusion or active transport of the substances across the membrane. ion channels are transport proteins that allow specific ions to move across the membrane since the charged ions cannot cross the non-polar core of the membranes. Most of the ions channels are specific and allow only particular ions to move through them. For example, Na+ ion channels will allow only Na+ ions to move across it while the chloride ions would not able to move through it.
D. ANGIOSPERMS
The flowering plants, also known as Angiospermae,or Magnoliophyta,are the most diverse group of land plants
If you meant to add a page, you didn't. You might need to re post the question.
A star's color often times determines the temperature of it. In this case, red would be the coolest color (and would be cooler than orange).
Answer:
a complex reaction
Explanation:
light sun and carbon dioxide are created
