4) The Earth's atmosphere supports the biosphere by providing A. Protection from all of the sun's electromagnetic radiation
B. Gases that reflect energy back to the Earth
C. Energy that powers the ocean's tides
D. Matter cycling that moves materials between the atmospheric layers

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.