The answer to your question is Nitrogen.
The answer is Algae and Photosynthesis Hope this helps! ;D
Answer: C.) Shallow Lake
Explanation: This is the answer because external fertilization can only happen with reptiles and other animals that are similar to reptiles.
Example: Snakes and turtles.
A biological community of interacting organisms and their physical environment.
"the marine ecosystem of the northern Gulf had suffered irreparable damage"
(in general use) a complex network or interconnected system.
"Silicon Valley's entrepreneurial ecosystem"
community
noun
1.
a group of people living in the same place or having a particular characteristic in common.
"Montreal's Italian community"
Similar:
group
section
body
company
set
circle
clique
coterie
ring
band
faction
gang
bunch
2.
the condition of sharing or having certain attitudes and interests in common.
"the sense of community that organized religion can provide"
Keith.
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