Sperm cannot fertilize an oocyte until they a. are activated by sustentacular cells of the vagina. b. undergo activation. c. are in the vagina for 3 days. d. lose their acrosome. e. undergo capacitation.

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

Bio molecules are essential to all living things. which biomolecule is “d” from the table

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals