Biology

Which of these actions is a reproductive strategy?A. a lioness teaching her young how to huntB. a tiger hunting deerC. cattle grazing on meadowsD. bats hanging upside down on trees
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Question 2 (Multiple Choice Worth 2 points)Which of the following correctly describes a way in which Earth's atmosphere interacts with the biosphere?
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Rosalind Franklins photographs of the X-ray diffraction pattern of DNA provided important clues about the structure of the DNA molecule. What was revealed by the photograph that enabled Watson and Crick to build their model of the DNA molecule? Select all that apply. A.The nitrogenous bases form the backbone on the outside of each DNA strand. B.The DNA strands are twisted around each other. C.There are two strands in the DNA molecule. D.The nitrogenous bases are near the center of the DNA molecule.
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Ecosystem distribution is related to precipitation; regions that receive large amounts of precipitation are wet and therefore
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The most common forms of peptic ulcer are duodenal and gastric ulcers. What are the most common risk factors for peptic ulcer disease?
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Corrine was getting a cup of coffee at a local convenience store when the cashier was confronted by masked gunmen. As the cashier reached below the counter to press an alarm, one of the gunmen shot her. Two weeks later, Corrine is still badly shaken. She is too frightened to run routine errands in her neighborhood. She startles easily. Although she is troubled by random flashbacks to the event, she finds that she can recall surprisingly little about it when she is directly asked. Corrine is MOST likely to be diagnosed with ______ disorder.
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Aerobic respiration is ultimately the reaction of glucose with oxygen to generate carbon dioxide, water, and energy. However, in a cell this process involves the transfer of electrons from glucose to carriers such as NAD over a lengthy series of steps. Why don't cells employ the direct reaction of glucose with oxygen to generate energy?
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Which of the following cheeses would likely spoil the most quickly? a. A high fat, high salt variety. b. A low fat, low salt variety. c. A low fat, high salt variety. d. A high fat, low salt variety.
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The vagina is at risk for infection because of its location and because it opens to the outside of the body. What is a protective mechanism of the vagina to keep from becoming infected? A) Maintains an alkaline pH of 7 to 8, which destroys invading bacteria B) Normal vaginal pH is acidic (4 to 5), which protects from infection C) Normal vaginal flora act as phagocytes of invading bacteria D) Produces its own natural antibiotics
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A situation where there are more than two alternative forms of a given gene would be called ________.
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If Jacques were to hold his breath the air in his lungs would be kept at a constant temperature. Would it be safe for Jacques to hold his breath while ascending from the bottom of the lake to the surface?
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Due to the constant random motion of its atoms and molecules, a substance will exhibit net movement from a region where it has a higher concentration to a region where it has a lower concentration. This net movement is called ___________.
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Consider the following definition: "A cell is the smallest unit of an organism capable of independent functioning, composed of a membrane, enclosing a nucleus, cytoplasm and inanimate matter." Which of the following phrases best criticized this definition?Human cells die apart from the body that supports them
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A 75-year-old client is diagnosed with atrial fibrillation and chronic congestive heart failure. The physician orders a combination of digoxin and diuretics to treat the client's diseases. Recent laboratory results indicate that the client's potassium level is 2 mEq/L. This client is at risk for which problem?Digoxin toxicity T/F
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Two steel balls that are the same mass and size are rolled with the same force across different level surfaces.The ball rolling across carpet will come to a stop faster than the one rolling across concrete because ofA)air resistance.B)friction.C)gravity.D)speed.
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Nitrogen atoms are part of the structure of some organic molecules, such as all amino acids and some modified carbohydrates. What other organic molecules contain nitrogen?
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Consider the demographics of a hypothetical low income country versus a high income country. Consider the total fertility rate (TFR) of the two countries. What statement would NOT apply in evaluating their TFR's? A)The low income country exists in a lower stage of demographic transition. B)In the high income country women have more access to educational resources. C)The low income country relies on agriculture for subsistence; the high relies on technology. D)We would expect to find adequate health care in the high income rather than the low income country.
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which of the followings are true about the pentose pathway? A. Pentose pathway generates NADH B. Pentose pathway generates 5-carbon monosaccharide C. Pentose pathway generates GAP D. Pentose pathway generates 4-carbon and 7 carbon monosaccharides
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The observed results of an oxperiment that occur from changes in the test variable (independent variablo) are known as _A.outcome variablesB.trialsc.D.constantscontrolled variables
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In mitosis, how does the number of chromosomes in a daughter cell compare to the number of chromosomes in a parent cell?Question 10 options:The daughter cell has one-fourth the number of chromosomes.The daughter cell has one-half the number of chromosomes.The daughter cell has twice the number of chromosomes.The daughter cell has the exact same number of chromosomes.
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Which of the following chemical reactions could be used to distinguish between a polyunsaturated vegetable oil and a petroleum oil containing a mixture of saturated and unsaturated hydrocarbons? A) addition of bromine in carbon tetrachloride B) ozonolysis C) hydrogenation D) lipidification E) saponification
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4. A small population of chimpanzees lives in a habitat that undergoes no changes for a long period.How will genetic drift probably affect this population?a. It will accelerate the appearance of new traits.b. It will promote the survival of chimpanzees with beneficial traits.c. It will increase the number of alleles for specific traits.d. It will reduce genetic diversity.
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