When a collision occurs between two reactant particles that, between them, have the required minimum kinetic energy, or activation energy, a product does not always form. which of the following reasons explains this?

a. low temperature

b. small surface area

c. unfavorable geometry

d. low concentration

Which best describes carbon dioxide’s path out of the body

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

What part of the body contains bile, an enzyme that break down lipids?