Soft-shell crab is a prized dish in many ocean-side resorts. why are the crabs' shells soft? the crab has just molted and the new exoskeleton has not yet hardened. these species have evolved a light and soft exoskeleton so that they can float in the water column. these species have evolved a light and soft exoskeleton so that gases can diffuse directly between body of the crab and the surrounding water. these species of crabs live under rocks and therefore have lost the hard exoskeleton over evolutionary time.

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.

what are the awnser choices? i mean, without choices, it is an incompleat

answer///unconditioned stimulus;