How many times does the Krebs cycle occur?

According to the pictures information?

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

What are the student's observations and inferences before he starts his investigation?

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth