Question 13 Which of the following are considered causes for adaptation? UV radiation O altitude O temperature and humidity infectious disease O all of the above Question 14 A person with would be more likely to have deep pigmentation if... O they lived in the tropics O they lived in cloudy conditions to prevent rickets O none of the above

Question 13 Which of the following are considered causes for adaptation? UV radiation O altitude O temperature and humidity infectious disease O all of the above Question 14 A person with would be more likely to have deep pigmentation if... O they lived in the tropics O they lived in cloudy conditions to prevent rickets O none of the above

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter28: Animal Tissues And Organ Systems

Section: Chapter Questions

Problem 1CT: Many people oppose the use of animals for testing the safety of cosmetics. They argue that...

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Watch this video (http://openstaxcollege.org/l/2point) to see a quick demonstration of two-point discrimination. Touching a specialized caliper to the surface of the skin will measure the distance between two points that are perceived as distinct stimuli versus a single stimulus. The patient keeps their eyes closed while the examiner switches between using both points of the caliper or just one. The patient then must indicate whether one or two stimuli are in contact with the skin. Why is the distance between the caliper points closer on the fingertips as opposed to the palm of the hand? And what do you think the distance would be on the arm, or the shoulder?
Some photographers develop a sensitivity to certain film developing chemicals leading to severe rashes on their hands such that they are unable to work with them. Explain what is probably happening.
Cultured Skin for Healing Wounds Diabetes is a disorder in which the blood sugar level is not properly controlled. Among other effects, it reduces blood flow to the lower legs and feet. As a result, about 3 million diabetes patients have ulcers (open wounds that do not heal) on their feet. Each year, about 80,000 require amputations. Several companies provide cultured cell products designed to promote the healing of diabetic foot ulcers. FIGURE 31.15 shows the results of a clinical experiment that tested the effect of one such cultured skin product versus standard treatment for diabetic foot wounds. Patients were randomly assigned to either the experimental treatment group or the control group, and their progress was monitored for 12 weeks. FIGURE 31.15 Treatment of diabetic food ulcers. Results of a multicenter study of the effects of standard treatment versus use of a cultured cell product for diabetic foot ulcers. Bars show the percentage of foot ulcers that had completely healed. What percentage of wounds had healed at 8 weeks when treated the standard way? When treated with cultured skin?
Like most mammals, a(n) __________ has a wet nose. a. New World monkey b. Old World monkey c. chimpanzee d. lemur
The astronomer Carl Sagan once said, "We are made of .star stuff." Explain why this is true of all life on Earth.
Like other nocturnal carnivores, the ferret shown in FIGURE 33.13 has light-reflecting material in its choroid. Explain why the presence of reflective material in this layer of the eye maximizes the degree to which light excites photoreceptors. Explain also why having reflective material in this layer causes the perceived image to be somewhat blurry. FIGURE 33.13 Eyeshine of a back-footed ferret A reflective layer in this nocturnal predators eyes enhances its night vision,
Definition Correct Answer Possible Answers nose ___________________ aden/o liver ___________________ cardi/o gland ___________________ hepat/o heart ___________________ ot/o ear ___________________ rhin/o
Which of the following sciences is not considered a natural science? biology astronomy physics computer science
Summoning Moaquitoes Parasites sometimes alter their hosts behavior in a way that increase their chances of transmission to another host. Dr. Jacob Koella and his associates hypothesized that Plasmodium might benefit by making its human host more attractive to hungry mosquitoes when gametocytes are available in the hosts blood. Gametocytes taken up by the mosquito will mature into gametes and mate inside its gut. To test their hypothesis, the researchers recorded the response or mosquitoes to the odor or Plasmodium-infected children and uninfected children over the course of 12 trials on 12 separate days. FIRGURE 21.18 shows their results. FIGURE 21.18 Attracting mosquitoes. The graph shows that the number of mosquitoes (out 100) attracted to uninfected children, children harboring the aseoual stage of Plasmodium, and children with gametocytes in their blood. The bars show the average number of mosquitoes attracted to that category of child over the course of 12 separate trials. On average, which group of children was most attractive to mosquitoes?
Why would you think twice about ordering from a restaurant menu that lists the specific epithet but not the genus name of its offerings? Hint: Look up Homarus americanus, Ursus americanus, Bufo americanus, Lepus americanus, Necator americanus, Lysichiton americanus, Leucoagaricus americanus. and Nicrophorus amcncanus.
Hansen's disease, also known as leprosy, arises when bacteria infect the Schwann cells that wrap around axons of peripheral nerves to form a myelin .shealth. Attacks by the immune system on the bacteria-infected glial cells causes a loss of myelin in peripheral nerves. How is Hansen's disease similar to multiple sclerosis? Why do the symptoms differ? Why are people with Hansen's disease unusually prone to injuring themselves?
Cervical Cancer Incidence In HPV-Positive Women In 2003, Michelle Khan and her coworkers published their findings on a 10-year study in which they followed cervical cancer incidence and HPV status in 20,514 women. All women who participated in the study were free of cervical cancer when the test began. Pap tests were taken at regular intervals, and the researchers used a DMA probe hybridization test (Section 15.3) to detect specific types of HPV in the women's cervical cells. The results are shown in FIGURE 37.26 as a graph of the incidence rate of cervical cancer by HPV type. HPV- positive women are often infected by more than one type, so the data were sorted into groups based on the women's HPV status ranked by type: either positive for HPV16; or negative for HPV16 and positive for HPV18; or negative for HPV16 and HPV18 and positive for any other cancer-causing HPV; or negative for all cancer-causing HPV. Follow-up time (months) FIGURE 37.26 Cumulative incidence rate of cervical cancer correlated with HPV status in, 20,514 women aged 16 years and cider. The data were grouped as follows: HPV16 positive HFV16 negative and HPV18 positive All other cancer-causing HPV Types combined No cancer-causing HPV type was detected. 1. At 110 months into the study, what percentage of women who were not infected with any type of cancer-causing HPV had cervical cancer? What percentage of women who were infected with HPV16 also had cervical cancer?