Which of these statements can be used to describe a chromosome? select all correct answers.
a. a chromosome is a long, continuous strand of dna
b. histones are proteins that are only present during mitosis
c. chromosomes are tightly packed during mitosis
d. chromosomes float freely around the cell of eukaryotes
e. telomeres are chromosome regions that lack genes
f. each chromosome contains only one gene

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.

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.

answer; blank(1); cervical; blank(2); lumbosacral;