First one who answers this questin wi beee marked brainliest.
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how can scientists use a seismograph to determine the density and depth of earth's layers?

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

Which element provides strength to the exoskeleton of clams and oysters

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.