Which molecules are typically used in aerobic respiration to produce ATP?
What will be an ideal response?
lipids, glucose, proteins
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Growth of new blood vessels is stimulated by vascular endothelial growth factor (VEGF). This ligand binds to the VEGF receptor, which leads to the dimerization and autophosphorylation of this receptor on cytoplasmic tyrosines. What type of receptor is the VEGF receptor?
A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor
Using the allele frequencies in the table below, what is the probability that a random person who was heterozygous 12/14 for VAW would also be homozygous 18/18 for FAG? (Assume that the two loci are unlinked.)
What will be an ideal response?
A nursing student develops a positive reaction to the tuberculin skin test. A history reveals possible exposure to patients with tuberculosis. A sputum sample is acid-fast negative. When asked for vaccination records, the student reports that childhood
vaccination records were lost when the family emigrated from a Southeast Asian country. What is the best explanation for the test results? A) The student has been infected with Mycobacterium tuberculosis. B) The student has been exposed to Mycobacterium tuberculosis. C) The student is not infected. D) The student has been exposed to Mycobacterium tuberculosis or was vaccinated with BCG vaccine. E) No conclusion is possible with the information provided.
Tinbergen observed that after gull nestlings hatch, the parents remove the eggshells from the nest. To understand why (ultimate causation), he painted chicken eggs to resemble gull eggs, which had camouflage coloration to allow them to be inconspicuous against the natural background. He distributed them throughout the area in which the gulls were nesting, placing broken eggshells with their prominent white interiors next to some of the eggs. As a control, he left other camouflaged eggs alone without eggshells. He then noted which eggs were found more easily by crows. Because the crows could use the white interior of a broken eggshell as a cue, they ate more of the camouflaged eggs that were near eggshells. Tinbergen concluded that eggshell-removal behavior is adaptive:
it reduces predation and thus increases the offspring's chances of survival.Rank these experiments from worst to best to study why gulls remove broken eggshells from their nests.____ Place broken eggshells near brown chicken eggs painted with dark brown spots, and record predation by crows.____ Place broken eggshells near real gull eggs, and record predation by crows.____ Place broken eggshells near brown chicken eggs, and record predation by undergraduate students acting as "predators."____ Place broken eggshells near brown chicken eggs painted with dark brown spots, and record predation by undergraduatestudents acting as "predators."____ Place broken eggshells near white chicken eggs, and record predation by undergraduate students acting as "predators." What will be an ideal response?