Which of the following best explains how enzymes speed up a chemical reaction? enzymes question 3 options: can add heat to a chemical reaction. remove heat from a chemical reaction. lower the activation energy of a chemical reaction. are not changed as a result of a chemical reaction.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.