Biology and Genetics
101624 questions • Page 1785 / 2033
Why did stromatolites decline during Cambrian and Ordovician time? The massive e
Why did stromatolites decline during Cambrian and Ordovician time? The massive expansion and radiation of animals increased competition and predation The evolution of jaws transfo…
Why did the precipitate line form closer to the origin of the HCI? The TA put th
Why did the precipitate line form closer to the origin of the HCI? The TA put the HCI and the NH_4OH in the tube at nearly the same time. How and why would the results have been a…
Why did the researchers set up four possible matings for each pair of population
Why did the researchers set up four possible matings for each pair of populations: female A+ male A; female B+male B; female A+ male B; female B+male A? o to compare the proportio…
Why did the room temperature water feel warm when your finger was cold and then
Why did the room temperature water feel warm when your finger was cold and then it felt cold when your finger was warm? thermoreceptors can only detect slight temperature differen…
Why did we review glycolysis in two phases: Preparatory vs. Payoff? What are the
Why did we review glycolysis in two phases: Preparatory vs. Payoff? What are the major differences between these two phases? In terms of the Overall glycolytic pathway, what's so …
Why do C3 plants have lower photosynthesis under higher temperatures? A. Stomata
Why do C3 plants have lower photosynthesis under higher temperatures? A. Stomata close to limit water loss as the VPD (vapor pressure deficit) increases with air temperature B. Ph…
Why do Mendel’s experiments disprove the hypothesis of blending inheritance? a.
Why do Mendel’s experiments disprove the hypothesis of blending inheritance? a. Because the trait for both alleles appeared in the F2 generation. b. Because the F1 generation had …
Why do Mycobacteria need to be stained with an \"Acid Fast Technique?\" A. they
Why do Mycobacteria need to be stained with an "Acid Fast Technique?" A. they have a thick cell wall they have a waxy cell wall they do not have nuclei they have positively charge…
Why do X-rays and gamma rays have equivalent RBE values if they provide differen
Why do X-rays and gamma rays have equivalent RBE values if they provide different amounts of energy to the body? Please explain the correct answer to me. The answer choices are as…
Why do adult urochordates (tunicates) lacknotochords, even though larval urochor
Why do adult urochordates (tunicates) lacknotochords, even though larval urochordates have them? Larvae use notochords to induce tissuedifferentiation; in adults, tissue is alread…
Why do agricultural researchers intentionally produce polyploid crop plants? Exp
Why do agricultural researchers intentionally produce polyploid crop plants? Explain in detail what polyploidy means and discuss different types of polyploid plants. Give four spe…
Why do animals require oxygen? Why do plants produce oxygen? (Related to Electro
Why do animals require oxygen? Why do plants produce oxygen? (Related to Electron Transport)
Why do asteroid surfaces tend to be smooth? They are covered with a lot of dust
Why do asteroid surfaces tend to be smooth? They are covered with a lot of dust and small particles left over from many impacts. They have been bombarded by a large number of micr…
Why do calculated recombination frequencies between pairs of loci that are locat
Why do calculated recombination frequencies between pairs of loci that are located far apart underestimate the true genetic distances between loci? Recombination frequencies canno…
Why do cardiac arrhythmias pose such a significant health concern? Why is it tha
Why do cardiac arrhythmias pose such a significant health concern? Why is it that a high electrical voltage ( generally speaking) exposure is preferable to a high (or moderate, or…
Why do cardiac enzymes rise after an acute myocardial infarction? A. White cells
Why do cardiac enzymes rise after an acute myocardial infarction? A. White cells are attracted to the site of muscle injury B. Injured fibers increase their synthesis of cardiac m…
Why do cells maintain low fidelity, error prone DNA polymerases for certain task
Why do cells maintain low fidelity, error prone DNA polymerases for certain tasks when more accurate, high fidelity DNA polymerases are available? gh fidelity DNA polymerases excl…
Why do coastal regions that are next to large bodies of water, like the Pacific
Why do coastal regions that are next to large bodies of water, like the Pacific Ocean, have a more moderate local climate? Select one: a. water has a higher thermal inertia compar…
Why do comet tails only appear when they move into the inner solar system? They
Why do comet tails only appear when they move into the inner solar system? They are too difficult to see when they are in the outer solar system. Heat from the Sun causes ices on …
Why do endothermic animals have, on the average, quicker and stronger muscular r
Why do endothermic animals have, on the average, quicker and stronger muscular responses than do ectotherms? Endotherms have bigger muscles per unit body mass than do ectotherms C…
Why do enzymes that lie downstream of a cell surface receptor in a signal transd
Why do enzymes that lie downstream of a cell surface receptor in a signal transduction pathway amplify as well as propagate the signal? As a cell biologist for a pharmaceutical co…
Why do equatorial sundials have markings in 15 degree increments? 15 minutes is
Why do equatorial sundials have markings in 15 degree increments? 15 minutes is a quarter of an hour, corresponding to a reasonable time interval. On average, the sun moves 15 deg…
Why do fatty acids yield more energy than carbohydrates? Select ALL valid reason
Why do fatty acids yield more energy than carbohydrates? Select ALL valid reasons. Triacylglycerols, the storage form of fatty acids, are hydrophobic and therefore do not store as…
Why do females show an intermediate phenotype? What are the expected phenotypic
Why do females show an intermediate phenotype? What are the expected phenotypic ratios in F1 generation? What are the expected results in F2 generation? 2. Bar eye in Drosophila i…
Why do functionally \"anomalous\" characters (e.g., the whale\'s non-functional
Why do functionally "anomalous" characters (e.g., the whale's non-functional hip and leg bones) support Darwin's inferred evolutionary relationships between certain groups (e.g., …
Why do individuals who are blind read Braille with the tips of their fingers rat
Why do individuals who are blind read Braille with the tips of their fingers rather than the backs of their hands? It would look silly to use the back of the hand there are more m…
Why do ion channels not function like open pores? What is membrane potential? Ho
Why do ion channels not function like open pores? What is membrane potential? How do K+ leak channels work? Why is the membrane potential of a resting cell negative? What is patch…
Why do irreversible reactions tend to be the most heavily regulated? Select the
Why do irreversible reactions tend to be the most heavily regulated? Select the BEST answer. A. To ensure that an unfixable mistake does not occur (i.e. once a product is made, th…
Why do magmas rise from the mantle and lower crust? What is the difference betwe
Why do magmas rise from the mantle and lower crust? What is the difference between a royalties and a basalt? A rock with a porphyritic: What are phenocrysts? A mafic magma: A sili…
Why do many oceanic volcanoes occur as long lines of volcanoes that are active a
Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? O The lithosphere moves over a stable hotspot in the mantle. The mantle convection …
Why do most cells in the body require oxygen molecules? A. Glucose cannot be bro
Why do most cells in the body require oxygen molecules? A. Glucose cannot be broken down without oxygen. B. Oxygen is generated by the conversion of pyruvic acid to oxaloacetic ac…
Why do most leaves have more than one type of pigment, like chlorophyll and caro
Why do most leaves have more than one type of pigment, like chlorophyll and carotenoids? Select one: a. Multiple pigments allow the plant to have both photosynthesis and cellular …
Why do moths fly to lights? Please put in an essay form 350 words +- 10 words Ot
Why do moths fly to lights? Please put in an essay form 350 words +- 10 words Other than these 2 theories. {Moonlight theory - Navigate using the moon. The sex theory - females gi…
Why do muscles need to come in, at least, pairs? Explain. What is unique about t
Why do muscles need to come in, at least, pairs? Explain. What is unique about the cat's skin muscles? Why are they arranged this way? You have studied the musculature of each spe…
Why do northern and southern Africa appear much darker in Figure 25-4b than in 2
Why do northern and southern Africa appear much darker in Figure 25-4b than in 25-4a? (a) Has the ocean around the continent changed temperature during the time between the first …
Why do pilot trials face obstacles in providing reliable safety and tolerability
Why do pilot trials face obstacles in providing reliable safety and tolerability data? The 95% confidence interval is too stringent in a pilot. Participants in a pilot may neglect…
Why do pimary alkyl halides typically undergo SN2 substitution reactions mor rap
Why do pimary alkyl halides typically undergo SN2 substitution reactions mor rapidly than do secondary or tertiary alkyl halides? nmany al halides art most Suite ble fur Snz becar…
Why do plants in early stage exhibit high levels of tolerance? Early plants cann
Why do plants in early stage exhibit high levels of tolerance? Early plants cannot inhibit the growth of plants. Early deal with harsh conditions, such as fluctuating temperatures…
Why do plants put so many nutrients in fruit when the fruit does not provide nut
Why do plants put so many nutrients in fruit when the fruit does not provide nutrients to the growing seed? A. the fruit attracts insects which pollinate the flower; otherwise the…
Why do plasmids used to carry foreign genes into E. coli cells invariably also c
Why do plasmids used to carry foreign genes into E. coli cells invariably also carry the gene for resistance to an antibiotic? Select one or more: a. The gene is necessary to safe…
Why do public health workers worry about sna 8 Trematodes like the liver fluke i
Why do public health workers worry about sna 8 Trematodes like the liver fluke inhabit humans and other vertebrates. Why do public health workers worry population size in relation…
Why do researchers believe color deficiencies often havegenetic causes? Dietary
Why do researchers believe color deficiencies often havegenetic causes? Dietary patterns affect colordeficiencies. Color perceptionchanges somewhat as we get older. …
Why do scientists refer to Charles Darwin\'s ideas about evolution as the theory
Why do scientists refer to Charles Darwin's ideas about evolution as the theory of evolution? A.After numerous hypotheses were developed by Charles Darwin, they were collected tog…
Why do sedimentary deposits tend to become smaller-grained and better sorted wit
Why do sedimentary deposits tend to become smaller-grained and better sorted with greater distance from their source? Select one: a. Small sediments are usually found closest to t…
Why do sodium ions need channels in order to move into and out of cells? Because
Why do sodium ions need channels in order to move into and out of cells? Because they are charged, and the hydrophobic interior of the phospholipid bilayer prevents them from movi…
Why do some stickleback populations lack pelvic spines? In lakes where there are
Why do some stickleback populations lack pelvic spines? In lakes where there are no large predatory fish, there is no advantage to having pelvic spines. In lakes with dragonfly la…
Why do some vertebrates, like a hellbender salamander, exchange oxygen as well a
Why do some vertebrates, like a hellbender salamander, exchange oxygen as well as carbon dioxide through their skin but bony fishes, like a goldfish, only exchange oxygen? * 2 poi…
Why do some vertebrates, like a hellbender salamander, exchange oxygen as well a
Why do some vertebrates, like a hellbender salamander, exchange oxygen as well as carbon dioxide through their skin but bony fishes, like a goldfish, only exchange oxygen? (Choose…
Why do the Hawaiian Islands form a chain of volcanoes? O The mantle below flows
Why do the Hawaiian Islands form a chain of volcanoes? O The mantle below flows slowly to the east, creating new volcanoes as it goes. O The Hawalian Islands are not part of a cha…
Why do the deltoids need to generate a greater torque when your arm-forearm is c
Why do the deltoids need to generate a greater torque when your arm-forearm is closer to your side versus straight out at 90 degree? a. Because the moment arm of the center or mas…
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