One way in which a virus gains control of a cell is to direct the synthesis of new viral proteins, which include such molecules as enzymes. to do this, however, the virus must provide the cell with mrna for the production of such proteins. viruses can achieve this goal in one of three basic ways: (1) they can import mrna into the cell in the form of the viral genome (2) they can allow the cell to make viral mrna through normal cellular genetic processes by providing the cell with viral dna (3) they can use unique mechanisms to convert their genomes into a form suitable for protein production • ex. + ssrna virus; this type of genome essentially mimics the mrna found in the cell • ex. dna virus, either ds or ss, which can take advantage of normal cellular processes to produce mrna • ex. - dsrna virus, which uses a novel enzyme called rna - dependent rna transcriptase to convert its genome into + ssrna, which can then be used for protein synthesis

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production

it would be heredity

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.