Which statement best describes the current scientific view of birds?
A) a group of feathered, endothermic dinosaurs
B) a group of feathered, ectothermic lizards that lack teeth
C) a group of flying, endothermic reptiles that have lost teeth, the amniotic egg, and other heavy body features as an adaptation for flight
D) a group of flying mammals that are derived from monotremes, which also lay amniotic eggs
Answer: A
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At an autosomal gene locus in humans, the allele for brown eyes is dominant over the allele for blue eyes. At another gene locus, located on the X chromosome, a recessive allele produces colorblindness while the dominant allele produces normal color vision. A heterozygous brown-eyed woman who is a carrier of colorblindness has children with a blue-eyed man who is not colorblind. What is the probability that their first child will be a blue-eyed female who has normal color vision? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)
What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about X-linked and autosomal inheritance? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Therapies using stem cells are already used in:
A. bone marrow transplantation. B. treating Parkinson's disease. C. treating Alzheimer's disease. D. All three of these choices are correct. E. None of these choices are correct.
Two true-breeding mutant strains of Drosophila have black body color instead of the wild-type gray yellow. When the two strains are crossed, all the F1 flies have wild-type body color. How can these data be interpreted?
A) Recombination occurred. B) Complementation occurred. C) The mutations involved are on two different genes. D) A new mutation occurred in all the offspring. E) Both B and C
The synthesis of ATP in the chloroplast by ATP synthase depends on different concentrations of hydrogen ions in the lumen of the thylakoid and in the stroma
Compare these two compartments of the chloroplast in terms of both actual hydrogen ion concentration and pH scale values. What will be an ideal response?