What two important factors determine the nature of an ecosystem?
a Temperature and humidity
C, Recycling of nutrients and flow of energy
b. Light and temperature
d. Flow of energy and predation

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

70 give a real life example showing how sensory neurons work with the motor neurons

Acorporation gives out its profits as dividends paid to whom?