Circle the letter of the sentence that is true about the law of superposition.
a. younger rocks lie above older rocks if the layers are undisturbed.
b. older rocks lie above younger rocks if the layers are undisturbed.
c. rock layers are never disturbed.
d. the youngest rock layers are typically at the bottom.

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o