Which of the following are not examples of levers? Check all that apply. A. a shovel B. a baseball bat being swung C. a loading ramp D. a bicycle wheel SUBMIT
A loading ramp is from the inclined plane "family"
A bicycle wheel is from the wheel & axle "family"
answered: Guest
answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.
Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems
Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false