Analyzing the pros and cons of a decision can help you make a difficult choice. Which of the following
is a pro associated with the use of geothermal
energy?
O A. Geothermal energy is available everywhere
on Earth.
B. Geothermal energy produces very little
pollution.
C. The chemical reactions involved remove
harmful substances from the air.
O D. A large amount of energy can be released
by a small amount of fuel.

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind