Acomputer model can simulate the aspects of viral reproduction quite well; however, microscope observation of actual viral reproduction can improve understanding because actual
a.) may reveal greater unknown complexities.
b.) are easier than a computer model to view.
c.) are the same each time.
d.) may provide reproduction events in sequence.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

you know they are heterozygous for a trait because they have it as jj or jj.