Ascientist discovers a new planet with a blue color in its atmosphere. what can he assume about the planet? a. the planet is very dense. b. the atmosphere contains hydrogen and helium. c. the atmosphere contains methane. d. the planet is not very dense.

Which of the following organisms are capable of self-fertilization? a. plants b. tigers c. humans

What tool do geneticists use to predict the outcome of genetic crosses? a. karyotype b. punnett square c. centrifuge

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food