What do the geochemical and biogeochemical cycles do? select all that apply.
1. process chemicals through multiple stages in living and nonliving things.
2. recycle plastic found in the landfills.
3. recycle old matter into new matter.
4. to biodegrade dead organisms

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)