Human blood cells have a cell membrane, the cell wall is not fully a cell wall as its made up of cellulose.
Answer:
In humans, mature red blood cells are flexible and oval biconcave disks. They lack a cell nucleus and most organelles, to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack.
Explanation:
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Answer:c
The curve slows it down
2nd one is the most realistic of what occurs in ecosyystems
I think B but i’m not for sure
