Acertain oak tree can only support a population of 25 squirrels - there isn't enough room or food for more. the number 25 is this tree's
exponential growth
population rate
carrying capacity
bycatch

How does human environment effect the biosphere

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.