The human skin that contains blood vessels, nerves, and glands is called the dermis.
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Answer:
None of the above
Explanation:
There exist some protists which are autotrophs such as green algae others are heterotrophs such as amoebas and paramecia but known of protists are eukaryotes, they are all prokaryotes. Don't forget concepts, eukaryotes have a true nucleus and other memebrane bound organelles such as mitochondria and since protists lack such structures, they cannot be considered as eukaryotes.
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The marble is release from the top of the ramp.Gravitational potential energy decreases as it roll down the ramp,at the same time the marble gains kinetic energy as well as a lost of energy in the form of heat due to friction.
Chenge in PE=change in KE
therefore energy remains the same on all parts of the ramp
The correct answer is option
.
The
is an ion made up of two atoms nitrogen and hydrogen.
The polyatomic ions are those ions, which are formed by the binding of the two or more elements, which has a charge and act as an ion. As all others are formed by a single atom, they are not polyatomic, only
is formed by two atoms, hence, it is an polyatomic ion.