What happens when a membrane contains a substantial amount of lipids that have chemical features that make them prone to forming more ordered structures (i. e., have saturated alkyl chains, such as sphingolipids, or are planar, such as cholesterol), even though it also contains other phospholipids with more fluidity (such as phosphoglycerolipids with unsaturated fatty acyl chains)?

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.

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

Which of the following explains why a tree is often used as a model to represent the principle of common descent