Explain why the process in the kidneys is called "filtration." (What is acting as a "filter"?)
What will be an ideal response?
Blood pressure forces fluids from the blood through the walls of the porous glomerular capillaries into the glomerular capsule.
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Who provided X-ray diffraction photographs of purified DNA fibers that suggested a helical structure with a consistent diameter of about 2 nm and a complete helical turn every 3.4 nm?
A. Hershey and Chase B. Chargaff C. Franklin D. Watson and Crick
Various modifications in leaves can make plants better adapted to their habitats. Which of the following is not an evolutionary modification of leaves?
A. floral leaves B. fruit-bearing leaves C. spines D. reproductive leaves E. insectivorous leaves
In eukaryotic cells, transcription and replication occur during of the cell cycle.
A. telophase B. interphase C. prophase D. anaphase E. metaphase
Compounds with carbonyl groups are known as
A. aldehydes or ketones B. ketones or hydrocarbons C. aldehydes or hydrocarbons D. alcohols or hydrocarbons