Read the following: Erythrocytes (red blood cells) have no nuclei, mitochondria, or other organelles when they are mature. These organelles are ejected when the erythrocyte enters the bloodstream or shortly thereafter. Post a paragraph that addresses the following: Should erythrocytes still be considered eukaryotic cells? Explain your rationale. What do you predict would be the effects of having no nucleus? Explain. In erythrocytes, the lack of mitochondria is an advantage. Why do you think this is true? Explain.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.

condenser is used to focus in the light microscope.