Which statement best describes an individual ecosystem?
a. an closed system with regard to energy, but an open system with respect to matter.
b. an open system with regard to energy, but an open system with respect to matter.
c. a closed system with regard to both energy and matter
d. a open system with regard to both energy and matter.

Grignard reactions are highly exothermic and are performed in ether solvent. there is a real risk of fire during this reaction. in the case that a fire should occur in your distillation apparatus, what is the best course of action? g

Which of the following statements is true? a. the main cause for speciation is an increase in gene flow. b. organisms that reproduce asexually are not considered part of a species. c. on a tree of life diagram, speciation is shown by the merging of two different lineages. d.the size of the geographic area inhabited by a population can cause speciation.

Mutations associated with albinism affect proteins involved in synthesis