Answer:
Active uptake.
Explanation:
This phosphate active uptake is mantained mainly by two systems: Pst system, which is only used in situations of phosphorus deficiency, when the level of the external Pi (inorganic phosphate) is lower than 20 micromolar. The Pit system is used constitutively, it means, at all time. These systems relies in several membrane proteins.
Both have been impacted by oil drilling and mining.
Answer:
Explanation:
C: the Independent Variable would be the weight of the cows
I'm pretty sure it would be the weight of the cows
