Which of the following statements are not true of carbohydrates? triglycerides are the most common type/ monosacharrides, disacharrides, and polysacharrides are the most common types. they are the most readily available source of energy for organisms. certain carbohydrates are enzymes or catalysts.

Match the types of competition to their descriptions.

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

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?