Suggest why the nucleus and ribosomes are so important in all eukaryotic cells.
A)The nucleus controls the passage of substances into the cell. The
ribosomes are necessary for new proteins to be made.
B)The nucleus acts as a brain for the cell. The ribosomes store proteins for the cell.
C)The nucleus contains genetic material, controlling cell function andinstructions for making new proteins. The ribosomes are where new proteins are made.
D)The nucleus and ribosomes are needed for photosynthesis, providing food for the cell.

Option C is correct.

The nucleus contain genetic material controlling cell function and instructions and nucleus is a place where new proteins are made.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.