What acts as a "check" valve to prevent blood from flowing back into the ventricle?

Which options correctly identify a feature of a scientific report that would suggest the report reflects scientific thinking? (Select all that apply) A. describes how the hypothesis was verified B. contains arguments that use the data collected C.

Which cell technology was made possible by the development of micromanipulation tools

An amino acid is synthesized by the prokaryote, E coli. The genes for the enzymes responsible for synthesizing this amino acid are encoded in an operon. The operon is regulated by a repressor.

What characteristics of the cell membrane determine what gets into the cell and what doesn't

An organisms's body must be organized in a way that enables it to

Which describes the genetic code in a human? A. Different genetic codes appear in each different type of cell. B. Every human has the same exact genetic code. C. Genetic codes change frequently in reaction to external factors. D.

Over time, natural selection results in species that are what?

With of the following is not an energy source a) monosaccharides B) polysaccharides C) vitamins D) lipids

Scientists evalute if the data fits the hypothesis in this stage of the scientific method: 1 > Hypothesis 2> Observation 3> Experimentation 4> Conclusion

Santos have a standardized definition of life true or false