Roots are important plant structures because
a) are the main site of photosynthesis and sugar production.
b) give plants protection and flexibility.
c) absorb sugars from the soil and anchor plants in the ground.
d) anchor plants in the ground and absorb water from the soil.

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

the answer is d p: cell, q: organ, r: organ system, s: tissue