Upper portions of the grand canyon show undisturbed horizontal layers of sedimentary rock. which of steno’s principles explain this?

select one:

a. principle of original horizontality

b. principle of superposition

c. principle of lateral continuity

d. principle of original verticality

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae