Answer:false!!!!
Explanation:
I'm pretty sure your talking about Vertebrates
Answer: A is the correct answer for both 3 and 4.
Answer:
phosphates will return to the soils or oceans again during decay
Hope I helped :D
Answer: 100 J
W = F*d
F = 20 N
d = 0,5
-------------------
W = 20 * 0,5
W = 10 J