Biology

Sierra decides to write down everything she likes to eat. Then, she draws branches under each animal on the list and writes everything they like to eat, and so on until she is down to all plants at the bottom of the page. What did Sierra make a diagram of?
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True or false: even when your research does not support your hypothesis, the hypothesis has value.
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economic importance of scorpion
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Choose two of the early cell formation hypotheses and discuss their differences:
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Another thermophile, Thermus aquaticus, was isolated from a hot spring in Yellowstone National Park. It is the source of the enzyme Taq polymerase, which is used in the molecular technique called polymerase chain reaction (PCR). PCR is used to amplify sequences of DNA. What extremophile characteristic of this enzyme makes it an essential component in a PCR reaction?a. Taq polymerase is stable under acidic or alkaline conditions.b. Taq polymerase is stable under extremely cold temperatures.c. Taq polymerase is heat-stable and can withstand high temperatures.d. Taq polymerase is stable in solutions that are extremely high in salt.
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When astronauts sleep in space, they sleep in small cabins or in sleeping bags that are attached to the wall of the station.Which condition requires them to attach their sleeping bags to the wall?
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What concept, inspired by the work of Charles Darwin, proposes that the diversity of human cultures represent different stages of development, from simple to complex?
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What are pharyngeal pouches, and how arethey evidence of evolution?
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Claim: An individual virus docks on the surface of a cell, infects it, hijacks the cellular machinery inside, and replicates itself, sometimes thousands of times. Justification: Based on what you learned about size, scale, and the component parts of a virus, justify with scientific reasoning how a virus is able to accomplish this.
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Belinda's food choices are lacto-vegetarian. Since vegetarians require 1.8 times more iron to make up for the low bioavailability of their diet, what would her daily iron requirement be?
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All of the following statements were part of the original cell theory proposed by Schleiden and Schwann, and many others including Remak and Virchow, with the EXCEPTION ofA)all cells come from other cells.B)the cell is the most basic unit of life.C)all living things are composed of one or more cells.D)viruses are not living since they are smaller than a cell.
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What covers the ends of bones in adults?A bloodB cartilageC marrowD ligaments
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6. Adaptations that result from natural selection are expected to increase the fitness of an organism.In terms of natural selection, which of the following best describes fitness?a. Being able to escape from predatorsb. Being among the strongest organisms in a populationc. Being able to survive, find a mate, and produce offspringd. Being able to survive long enough to reach the adult stage
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What happens to contraction of a muscle cell if some of the Ca2+ that was released during a contraction is still in the cytoplasm (sarcoplasm) when the next stimulus arrives? Group of answer choices The muscle contracts with the same tension generated as during the first contraction, because muscles contract in an all-or-none fashion. The muscle contracts with the same tension generated as during the first contraction, because the number of cross-bridges formed is always the same during a contraction. The muscle contracts with greater tension generated because there will be more Ca2+ in the sarcoplasm after the second stimulation, which will bind to more troponin molecules. The muscle contracts with greater tension generated because more troponin molecules bound means greater myosin-binding sites (active sites) are revealed on the actin, leading to a larger number of cross-bridges formed.
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7.What are the 3 checkpoints normal cells go through to prevent unregulated cell division?
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The moon rotates around the earth at a speed of 2,288 miles per hour. Is the moon accelerating?
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Work a punnett square for a father who is type A heterozygous and the mother is type B heterozygous.What is the phenotypic ratio?
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Which of the following reasons best explains why a scientist would want to examine a possible link between modern women waiting longer to have children and an increase in the number of female babies? A. to test the predictions of current theories B. to discover new aspects of the natural world C. to test the conclusions of prior investigations D. to explain recently observed phenomenaReset Submit
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true or false? Stratified squamous epithelium forms the surface of the skin, the lining of the mouth, and the lining of the esophagus.
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Which is a component of a phospholipid?carbon ring hydrophilic headlong-chain alcoholamino acid
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Why is it helpful for scientists to compate substrate samples in the arson case discussed in the video
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In 1944 Avery, MacLeod, and McCarty performed transformation experiments using live, harmless bacteria and extracts from virulent bacteria treated with various enzymes. Which of the following enzymes were used and why? (A) Proteases and RNases to rule out protein and RNA as the transforming factors (B) Lipase (an enzyme that facilitates the breakdown of lipids) to rule out lipoproteins as the transforming factor (C) Kinase (an enzyme that facilitates transfer of a phosphate group from ATP to a substrate molecule) to show that transformation is phosphorylation dependent (D) ATPase to show that transformation is not dependent on ATP
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Which of the following ancillary or supportive criteria is addressed in this statement: Infants who are put to bed prone less than half the time have an increased incidence of SIDS compared to those who are never put to bed prone. Those who are always put to bed prone have an increased incidence of SIDS compared to those who are put to bed prone less than half the time.A. Consistency. B. Biological plausibility. C. Strength of the association. D. Dose-response relationship.
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Sandy has a huge crush on Casey. When he is nearby, Sandy doesn't pay attention to anything or anyone else. Psychologist Donald Broadbent explained that we selectively attend to the most important information in _________ model he developed.
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