Latrice is helping build birdhouses in an effort to attract more purple martins to her area. Building purple martin birdhouses has been shown to increase the size of populations of this bird, which have declined in recent years. What is the limiting factor for purple martin populations in this area?

i would have a lunch. it's one big package of food, making it one food. : p

condensation. good luck!

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.