The left atrium lacks a group of pace maker cells.
Answer:
Four
Explanation:
Like all proteins, the "blueprint" for hemoglobin exists in DNA.
<em>Chemical weathering is most effective in;</em>
C) A warm, moist climate
<u>Chemical processes need water, and occur more rapidly at higher temperature, so warm, damp climates are best.</u>
Answer:
Heterotrophs compete for the same food source.
Explanation:
