A benefit of global warming includes
a. farming in areas that were too cold in the past.
b. more open shipping channels in the Arctic.
c. commercial fishing in the Arctic ocean.
d. milder winters in regions far to the north.
e. all of these.
E
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The soil type that has the best oxygen concentration and water penetration is called ________
a. topsoil b. leaching c. loam d. rock e. humus
A cancer that develops in muscle is
a. malignant melanoma. b. oat cell carcinoma. c. giant cell carcinoma. d. rhabdomyosarcoma. e. Wilm's tumor.
Mutations at the cutting site of restriction enzymes always lead to shorter fragments. Indicate whether the statement is true or false
___________________ were the first organisms in the history of life on earth that could use solar energy to build organic compounds from CO2, and in the process break down water molecules to release oxygen.
a. Cyanobacteria b. Chemolithotrophs c. Retroviruses