Blood stasis, changes in the vessel wall, and certain medications affect the ability of the blood to effectively clot.
Explanation:
Clotting is also known as blood coagulation. It is the process by which blood forms a clump which is either gelatinous or semisolid in state.
Clotting is very necessary because it prevents unnecessary loss of blood in case of cuts and injuries.
However the tendency of blood to form random clots is also very harmful because it might lead to blockage in the blood vessels.
Effective blood clotting can result from:
- Blood stasis, a condition in which the flow of blood in the vessels is hindered,
- Changes in vessel walls.
- Certain medication that prevents blood clotting or decreases blood density.
The freshwater flatworm has A. Flame cells. Flame cells function like a kidney, removing waste through filtration. Cilia propel waste matter down the tubles and out of the body through a pore. Looking at a Flame cell through a microscope the cilia cluster looks like a flickering flame.
Answer:
B. Only from the ocean to earth's surface
Explanation:
The biosphere is known as the layer of the Earth where life exists. It reaches a peak of ten kilometers above sea level, which is used by some birds in flight while the biosphere go to depths as low as 8 kilometers deep or the bottom of the ocean.
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Answer:
DNA evidence revealed the American vultures share more recent ancestor with the Storks
Explanation:
The hooded vultures that is mostly found in the African continent have a close resemblance with the American vultures and were traditionally classified to belong to the Falcon family.
However, it was observed that the American vultures shared a similar behavior with Stork which is not common to the vulture found in Africa, including the hooded vulture. The Stork and the American vulture exhibit the behavior of urinating on their legs when being overheated. When the urine gets evaporated, it helps them to cool their body temperature.
This shared behavior between the storks and the American vultures led scientists into using molecular analysis in analyzing the DNA of the hooded vultures found in Africa, the American vultures, and the stork.
Evidence from the DNA analysis later revealed that the American vultures and the storks share a more common DNA sequences than African vultures and American vultures do.
The dark brown color of a penny is most likely oxidation, which occurs when the copper in the penny comes in contact with oxygen.<span> </span>
