Which statement best describes type 1 diabetes?
A. Near-normal insulin levels are maintained.
B. Beta cells are hyperactive.
C. It is the more common form of diabetes.
D. Insulin-producing cells are attacked by the immune system.
E. It often occurs as a result of obesity.
Answer: D
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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 a child with a blue-eyed man who is not colorblind. An ultrasound test shows that the child is a girl. What is the probability that she will be colorblind? (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?
Bacterial Strain A divides every 30 minutes. If you require at least 4 billion cells to perform an experiment, how long will you need to incubate a culture tube inoculated with a single cell of Bacteria A to get enough material to perform your experiment?
A. 16 B. 32 C. 4 D. 8 E. 2
In meiosis in females, only one haploid cell develops into an egg. The remaining haploid products of meiosis are ________, which usually degenerate
Fill in the blank with correct word.
The most heat-tolerant organisms presently known come from
A) tropical deciduous forests. B) tropical rain forests. C) deep-sea hydrothermal vents. D) tundras. E) chaparrals.