Original source of sand was from rocks rubbing up against each other in the ocean and the current of water in the ocean bringing them to land.
<span>Taste buds consist of both gustatory cells and basal cells. They are located deep between circumvallate papilla</span>
Answer:
valence electrons an element has in its outer shell, the easier it is to complete.
The most electron shells an element has, the easier it is to fill its outermost shell.
Explanation:
Non metals atoms bond to other elements by sharing or completing the valance electrons in other element. This is easily made when the other element lacks a small number of electrons, for example with Hydrogen it has 1 valance electron because of that it is easier to bond with other elements.
The given statement is true the International System of Units is important and it is the basis of the communication between all the scientists
Explanation:
The International Systems of Units is the basic unit for the measurements and this system is accepted world wide and they do not change over the time period since each country use different units of measurements
This is the modern method of the metric system and there are seven base units like the meter kilogram second ampere kelvin mole and candella
Answer:
A- Tunica intima, tunica media, tunica adventitia.
Tunica intima
Is the internal layer of the arterial wall, it is a sqaumous epithelium which is surrounded by connective tissue and elastic fibre, it provides a one way flow of blood.
Tunica media
The middle layer is made of smooth muscles and is the thickest layer that changes the arteries diameter controlling blood pressure and flow.
Tunica adventitia
A dense outer layer of the arterial wall made of connective tissue. It consist of collagen fiber and provides protection to the blood vessel.