The exchange of gases with the respiratory
medium by animals occurs through the process of:
1.Active transport
2.Diffusion
3.Osmosis
4.Countercurrent exchange
2
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Which of the following bioenergetic processes CANNOT occur in hyperthermophiles?
A) chemoorganotrophy B) chemolithotrophy C) photosynthesis D) chemoorganotrophy, chemolithotrophy, and photosynthesis
You are a genetic counselor, and a couple comes to you with concerns that if they have a child
together it could have hemophilia. Neither one of them has hemophilia, but the woman's biological father did have an X-linked recessive form of hemophilia. Which of the following would be a correct thing to tell them?
a. Any child that they produce will have a 50% chance of having hemophilia. b. All of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of having hemophilia. c. None of their offspring should have hemophilia, but all of their female offspring will be carriers for hemophilia. d. Each of their male offspring will have a 50% chance of having hemophilia, and while their female offspring should not have hemophilia, they will each have a 50% chance of being carriers. e. All of their male offspring will have hemophilia, and while their female offspring should not have hemophilia, they will all be carriers.
Carbon dioxide levels in the blood and in cerebrospinal fluid affect pH of these fluids. This enables the organism to sense a disturbance in gas levels as ________.
A) the brain directly measures and monitors oxygen levels and causes breathing changes accordingly B) neurons in contact with cerebrospinal fluid monitor pH and use this measure to control breathing C) the brain alters the pH of the cerebrospinal fluid to force the animal to retain more or less carbon dioxide D) stretch receptors in the lungs cause the medulla oblongata to speed up or slow breathing E) the medulla oblongata is able to control the concentration of bicarbonate ions in the blood
A patient has a suspicious skin infection and a culture is taken. Which media would be appropriate to select for Staphylococci?
A. nutrient agar B. blood agar C. chocolate agar D. MacConkey agar E. mannitol salt agar