The valve that prevents black flow into the right atrium is the tricuspid
Answer:
The chromosomes of two diploid cells split apart at the the centromere
Explanation:
Answer:
<em>Alfred Wegner</em> proposed the theory of <em>Continental drift</em> which suggested the continents move and started out in different positions from what they are currently. In the 1960s, scientists discovered the spreading apart of <em>the seafloor</em>. This in turn led to the theory of <em>Plate tectonics.</em> This theory says that the <em>earth's outer crust, the lithosphere</em> is made of plates which float on a "plasticlike" undersurface called the asthenosphere. Where these plates come together at their<em> boundaries</em>, changes take place in the crust and its feature.
Explanation:
Alfred Wegner proposed the theory of Continental drift which suggested the continents all continents were once connected in a large single mass that broke apart around 200 million years ago before slowly moving apart to where they are currently.
In the 1960s, Harry Hess, a geologist and Navy submarine commander during World War II, discovered the spreading apart of the seafloor. This in turn led to the theory of Plate tectonics. This theory says that the earth's outer crust, the lithosphere is made of plates which float on a "plasticlike" undersurface called the asthenosphere. Where these plates come together at their boundaries, changes take place in the crust and its feature.
Can't see the structures so we can't answer your question
Ribosomes are a collection of PROTEINS <span>that are needed for TRANSLATION. RRNA
hope this helps</span>