Select the correct answer. Sodium has the atomic number 11. How many electrons are in a sodium lon, which has the symbol Nat?
OA. 10
OB. 11
O C. 12

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

Dna replication or repair occurs in a cell in all of thw following situations except when