When studying a complex biological phenomenon, it is required to look at the workings of the various systems associated with it. The research is a top-down approach of getting down to the very detail of the cells and molecules taking part in it. Example, a person finds it difficult to digest milk and vomits it on ingestion. As we go a level down, we identify the systems getting affected by the milk. Then, further down, the cells that take in digesting the milk are identified. The enzymes that break down the substances in the milk are identified. The gene regulation of this enzyme (lactase) is studied to check its regulation. This work of doing a top-down approach to find the signalling pathway within the cells to identify the problem with the working of lactase to digest milk, is a necessary approach.
Answer:
thanks i need more point bopleals
The ocean surface currents circulate counter clockwise direction in the southern hermisphere duebto the coroilis effect.
These are the ones i was taught
1. molecule transport
2. signal receptors
3. intercellular junctions
4. cell to cell communication and recognition
5. gives the cell structure
6. protects the cell
7. acts as enzymes
c would be your answer i just took the test