The rock and fossil record shows that

a.

the earth has not changed very much over the course of its history.

b.

all of the changes during earth's history have been very sudden.

c.

both gradual and sudden changes have occurred during earth's history.

d.

all of the changes during earth's history have been slow and gradual.

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

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

To store strawberries in sugar syrup, lucy placed them in a jar and covered them with sugar but did not add any water. do you think syrup will be formed? justify. a. no. since water is not added, there cannot be any syrup formation. b. no. the higher concentration of sugar on the outside will cause the water from the sugar to diffuse in the strawberry cells causing them to swell without formation of any syrup. c. yes. the higher concentration of sugar on the outside will cause the water from the strawberry to diffuse out resulting in syrup formation. d. yes. the sugar will melt over time and form the syrup.