Viruses cannot reproduce without a host, they do not need to excrete waste nor breathe, but they do die and they do evolve. scientists, however, do not consider viruses to be living things. why?
because living things must exhibit all characteristics of life to be considered living
because living things must be able to reproduce on their own
because living things must be able to excrete some form of waste
all of the above are true

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

What is the next step in muscle contraction after the actin changes shape? (apex)

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