If you follow the longest food chain in the food web below from grass to owl,

how many trophic levels are there?

grass

aspen

grasshopper

rabbit-fox

frog

#snake

owl

o

A. Three

B. Five

C. Four

D. Two

What is the biggest danger of UV rays from the sun? A. sunburn B. heatstroke C. skin cancer D. ozone damage

Nitrate acts as a poison by interfering with oxidative enzymes. oxidizing hemoglobin to methemoglobin, which cannot carry oxygen. reacting with enzymes that break down toxic wastes in the liver. blocking cell protein synthesis.

Explain how a small amount of chlorofluorocarbons can destroy a large amount of ozone. Small amount of chlorofluorocarbons can destroy a large amount of ozone Because the released halogen is a catalyst, a single CFC molecule can cause the

What happens if you increase the thickness of a membrane what happens to the rate of diffusion?

How does heat energy get from the Earth's surface to air? A) Convection B) Conduction C) Emission D) Radiation

In what way are slime molds similar to kelp?

What does not exist in a supersaturated solution

When dust and ash particles from a volcanic eruption block out sunlight and reduce solar radiation, earth experiences the. This results in temporary climate cooling

Which of Jupiter's moons is volcanically active? Io Ganymede Europa Callisto

Risk assessment depends on