A. Prokaryotic cells DO NOT have a nucleus or membrane bound organelles. Eukaryotic cells do.
Explanation: A simple way to remember the is by PROkaryotic has NO nucleus. (Pro-no)
EUkaryotic has a nucleus.
(Eu- sound like you, you have cells and they have a nucleus.)
Fossil Fuels; Once they run out ,humans can not replacing them.
You should start studying a week before
Answer:
The heat given off by Earth's core is circulated through mantle convection.
Explanation:
Heating materials usually causes them to <em>expand</em>; as they become hotter, they also become less dense. Convection describes the transfer of heat from hot areas of liquids and gases to cooler ones. This causes the heated, less dense material to rise and more dense material to fall, as it’s pulled by gravity. Super-heated metal forming Earth’s central core heats rock in the mantle; the hot and cool rock slowly rise and sink- this circulation process is called mantle convection.
Cellular structures and lifestyles
are much diversified.
In spite of these differences, the same basic molecular mechanisms govern the
lives of both prokaryotes and eukaryotes,<span> the general classes of
proteins involved in signal transduction are conserved all over living cell. This is manifested through the
re-used of protein receptors, protein kinases,<span> phosphoprotein phosphates, and ion channel receptors.</span></span>
