Which description of skeletal cartilage is incorrect? fibrocartilages are able to withstand both pressure and stretch. costal cartilages reinforce airways and support the external nose. elastic cartilages are able to tolerate repeated bending. articular cartilages cover the ends of most bones at moveable joints.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

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explanation: