For each scientist listed below, explain how they contributed to the cell theory. Contribution to Cell Theory Scientist 1. Robert Hooke 2. Matthias Schleiden 3. Theodor Schwann 4. Rudolf Virchow

What are charcteristics of lithosphere?

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

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