Saliva has a pH normal range of 6.2-7.6 with 6.7 being the average pH
Answer:
C. They are multicellular.
Explanation:
The answer would be dermal. This is the outermost part of the plant that
serves as the protection from the outside environment. This is the part
that creates cuticle, the waxy layer of the plant, and this helps the
plant retain its water. Therefore, when you are eating a celery stick,
you are eating the dermal tissue of the plant.
Answer:
Explanation:
the first officer to arrive
The flow of energy from the Earth's interior originates from two main sources: the radiogenic and primordial heat respectively. Radiogenic heat is produced by the radioactive decay of isotopes in the mantle, whereas primordial heat is the energy left over since the Earth's formation.
Without using any sensitive scientific equipment, this flow of energy is observable at stress points between the tectonic plates, such as volcanoes. These are ruptures in the crust of the planet through which materials from the interior of the planet are expelled.