Muscle A and muscle B are the same size, but muscle A is capable of much finer control than muscle B. Which of the following is likely to be
true of muscle A?

A)Each of its motor units consist of more cells than the motor units in muscle B.

B)It contains larger motor units than muscle B

C)It contains smaller motor units than muscle B.

D)It is controlled by fewer neurons than muscle B.
Clear

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

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