Although reptiles and birds have many differences in terms of movement, there are also many similarities in their bone structure and arrangement in each limb. This cladogram compares the bones from each animal, as well as the lobe-finned fish hypothesized to be the common ancestor of each animal. What conclusion can be drawn from the evidence presented in this cladogram?
a
Birds are more closely related to fish than to reptiles.
b
Birds and reptiles experienced a recent genetic drift, causing their speciation.
c
Birds and reptiles share homologous structures in their skeletons.
d
Birds and reptiles share the same DNA sequence.

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000