Which of the following is true about lethal alleles? Group of answer choices A They can kill an organism before birth.
B They can be dominant or recessive.
C They can alter the number of offspring the organism has.
D All of these are true.

Which describes radioactive decay of a substance

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.

Brian made this table to organize his notes on changes of state change of state energy change melting gain freezing lose deposition gain condensation lose