The genes for light eyes ( lt; light) and straw bristles ( stw; straw) are tightly linked on chromosome ii in drosophila melanogaster. the malpighian tubes of lt larvae and adults are maternally affected in that malpighian tubes of lt/lt organisms, whose mothers were lt+/lt and have more yellow pigment than those from lt/lt mothers. there is no maternal effect associated with the straw locus. give the phenotypes of the offspring from the following crosses. cross #1: lt stw/lt stw; lt+stw+/lt stw
cross #2: lt+ stw/lt stw; lt stw+/lt stw
cross #3: lt+ stw/lt stw; lt stw/lt stw

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

Question 1 of 102 pointswhich best describes adaptive radiation? oa. geographical isolation caused by an adaptationob. biodiversity resulting from few ancestorsoc. a decrease in the rate of speciationd. adaptations that organisms teach each other

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.