Even though the bones are very hard, the two bones that form a joint do not cause friction, except in the elderly. which is an appropriate justification for the smooth movements of these bones? synovial fluid, which is present in the space between the joints, acts as a lubricant, thus avoiding friction of the two bones forming a joint. cartilaginous disc, which is present in the space between the joints, acts as a lubricant, thus avoiding friction of the two bones forming a joint. acetylcholine, which is present in the space between the joints, acts as a lubricant, thus avoiding friction of the two bones forming a joint. nextreset

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

The instructions for making proteins come originally from

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels