Which of the following statements is true of passive transport of solutes across the plasma membrane?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Abnormal softening of a gland is known as

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above