In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?
A) length and position of the centromere only
B) length, centromere position, and staining pattern only
C) length, centromere position, staining pattern, and traits coded for by their genes
D) They have nothing in common except that they are X-shaped.
Answer: C
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A) paracrine signal B) neurotransmitter C) prostaglandin D) pheromone E) growth factor
The phrase "Modern Synthesis" refers to:
A. the synthesis of Darwin's ideas about evolution with Malthus' ideas about population growth. B. the synthesis of Darwin's and Wallace's independently developed ideas about natural selection and adaptation. C. the synthesis of Darwin's ideas about natural selection and Mendelian genetics. D. the synthesis of Darwin's ideas about natural selection and modern DNA sequencing technology. E. all of the answer options are correct.
Why is the tuberculosis bacterium so hard to treat and destroy in the body?
What will be an ideal response?
How are bacteria important to the genus Rhizobium?
a. They provide fixed carbon dioxide to legumes. b. They provide fixed nitrogen to legumes. c. They carry out photosynthesis. d. They carry out respiration. e. They carry out decomposition