1. Every scientific theory starts with an observation of an unexplained phenomenon. Scientists look to explain such phenomena by developing theories. The first step is to develop a hypothesis, which can be a suggested solution for the unexplained occurrence (phenomenon). After substantial research and experimentation, and if enough evidence accumulates to support a hypothesis, it is widely accepted as the best possible explanation. This hypothesis has now moved on the next step — and it is on its way to becoming a theory — in the scientific method. This theory becomes accepted as a valid explanation of a phenomenon. One of these theories is the Cell Theory. SC.912. L.14.1 . Which is not a part of the Cell Theory? (1 Point) A. All living organisms are composed of cells. B. The cell is the basic unit of life. C. Cells arise from pre-existing cells. D. Cells, the basic unit of life, are derived from spontaneous generation.

What does it mean if an area has high biodiversity? select one: a. different organisms live in the world b. lots of different organisms live an ecosystem c. lots of the exact same organisms live in an ecosystem

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.

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%