Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
<span>The ecological condition of that patch is MICRO CLIMATE. Micro climate is the climate of a restricted area, which differs from the climate of the surrounding area. Local climates can vary greatly in a particular area depending on the prevailing factors such as wind, moisture, topography, vegetation, etc.</span><span />
Answer:

Explanation:
The given compound is an alkane because all the bonds between carbon are single. Alkanes have all single bonds and are thus called saturated hydrocarbons.
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Hope this helped!
<h3>~AH1807</h3>
Answer:
Babies with blue eyes :b
Brown eyes: B
Round head: H Pointed head: h
Possible genotypes
1. bbHH
2. bbHh
3. bbhh
4. Bbhh
5. BbHh
6. BbHH
7. BBhh
8. BBHh
9. BBHH