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.
Answer:
B
Explanation:
B is the correct answer because the environment effects how the body has to adapt.
1. The sizes of their necks vary
The whales tail which is called fluke are used for swimming and also used when they stick their tail out of the water into the air, swing it around, and the slap it on the water's surface.
