Explain why the number of trophic levels in a given ecosystem is limited
What will be an ideal response?
This is because energy is transferred from one level to the next with very low efficiency. As a result, energy loss prevents significant energy transfer at the highest trophic levels. The loss of energy with each transfer also explains why the collective biomass of successively higher trophic levels decreases.
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Which of the following parts of the Golgi complex receives materials from the ER?
A. Cisternal edges B. Trans face C. Cis face D. None of these are correct.
Hemodialysis____
a. involves removing the patient's blood, cleansing it, and returning it to the body b. can be done at home by pumping dialysis solution into the abdominal cavity c. only needs to be performed once a month d. replaces a person’s blood during the filtration process e. is only required while a kidney heals itself
You start to fall but then catch yourself, regaining your balance. Which of the following brain regions is responsible for the rapid coordination of muscle activity that kept you from falling?
A) motor cortex B) thalamus C) cerebellum D) pons
What 2 genera produce endospores?
What will be an ideal response?