What is a possible explanation for why the giant ice caps that covered a
supercontinent in the Paleozoic era melted?
O
A. Volcanic outgassing increased the greenhouse effect.
O
B. Oxygen in the atmosphere built up, raising global temperatures.
O
C. Plant life turned oxygen into carbon dioxide, increasing the
temperature.
O
D. Marine life thrived during this period.

Which statement is true about cell differentiation? cell differentiation happens in all cells. results in two new identical daughter cells. causes cells to change type and become specialized. occurs during cell division.

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.