Answer:
Ice is less dense than water
Explanation:
Whenever a substance floats on top of another it has to be less dense.
Answer:
La función del sistema nervioso periférico es doble. Por una parte transporta los estímulos que recibe el organismo, tanto externos como internos, hasta el sistema nervioso central para ser procesados.
Explanation:
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Answer:
D
Explanation:
because molecule A is only shown on the outside and is not exposed to the acidity on the inside of the cells
Answer: The following statements are true about plant cells-
-They have a cell wall
-They have the same functions
Explanation:
A cell wall is present in a plant cell to keep its structure and rigidity. They are made from cellulose.
All plant cells have a nucleus, ribosomes, mitochondria and cell membrane and they all have the same functions as they would have in an animal cell.
Statement 1 is false as plant cells are eukaryotic, which means they have a nucleus.
Statement 2 is also false because a plant cell needs a cell membrane to separate the vacuole and the organelles.
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Answer: the correct answer is C) the hepatic portal vein.
Explanation:
The portal vein is not a true vein, because it conducts blood to capillary beds in the liver and not directly to the heart. It is a major component of the hepatic portal system, one of only two portal venous systems in the body – with the hypophyseal portal system being the other.