If we had 600 g of radioactive substances how much of the radioactive substance would remain radioactive after 4 half-lives?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.

_is a product of the first stage of photosynthesis.atpglucosecarbon dioxidewater