It's considered to be an advantage to have lungs with increased capacity, because with increased capacity
a. the chest looks more "buff."
b. the lungs will fight off colds and influenza.
c. the lungs can better exchange oxygen and waste products in the blood.
d. anaerobic exercise is easier.

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

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

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.