In a typical temperate zone forest, the concentration of co2 in the air fluctuates with (choose any/ all that apply, points deducted for incorrect choices)
a. season of the year
b. phase of the moon
c. soil temperature
d. forest age
e. time of day
f. canopy height

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Explain light independent reactions

Two critical interventions to turn around the opioid crises are: