Which of the following is NOT regulated by the blood?

nutrient levels
body temperature
pH level
fluid volume

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

How can you keep track of variables in a science experiment?

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.