Over time the neck length of the giraffe has increased as only those giraffes with longer necks survived by eating leaves high up on the trees and were able to reproduce and pass those long necks genes on to the next generation, this is an example of which characteristic of life?

What was the land like over 500 million years ago? what was under the sea?

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.