During the signal transduction process, the signal often triggers a signal transduction cascade. for example, an activated receptor activates hundreds of protein a. each activated protein a activates hundreds of protein b and so on until a cellular response occurs. what purpose does this cascade serve? the cascade serves to amplify the signal, so one activated receptor can have a significant response. having several intermediates allows for the cell to determine what signals it will sense. having a cascade allows the cell to respond to different signals. the cascade makes signaling easier to shut off or terminate.

How would you take a difficult subject matter - such as poaching, deforestation, or climate change and communicate it in a kid-friendly way

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area