Answer:
The only haploid cells in humans (with 23 chromosomes and no matching pairs) are:
A. sperm and egg cells
I believe a river is the answer
Answer:
While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere. The exchange of carbon dioxide and oxygen during photosynthesis (Figure below) and cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.
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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