A) gravitropism is how they "know"
Second option/ the gametes produced by meiosis allow for closing organisms
<span>The pancreas secretes digestive enzymes in the slender instincts, these enzymes produce endocrine secretions through the hormones and pass through the blood. Endocrine cells called pancreatic islets secrete insulin and glucagon and have endocrine functions that are formed through the hormones and pass through the bloodstream.</span>
That should be the cell membrane. The cell membrane acts as a filter in and out.
The answer is the second choice
