Ultimate Biology Study Guide - Questions & Answers

why are proton pumps in root-hair plasma membranes important? why are proton pumps in root-hair plasma membranes important? they allow toxins to be concentrated in vacuoles, so the toxins do not poison enzymes in the cytoplasm. they pump protons into cells, generating a membrane potential (voltage). they set up the membrane voltage required for action potentials to occur. they set up an electrochemical gradient that makes it possible for roots to absorb cations and anions.
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which do you think would be able to move more easily, and why? the earthworm, because it uses two sets of muscles to help it move through the watery solution the nematode, because its whiplike motion will easily propel it through the watery solution the earthworm, because it can contract and expand its muscles to burrow down through the watery solution the nematode, because it can move its paddle-like appendages on its segments to help it move through the watery solution
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male ants still produce sperm through meiotic cell divisions. given their cells are haploid at the start, which stage of meiosis is likely to be unnecessary for the formation of their gametes?
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which size of particulates are the most harmful to human health? group of answer choices greater than 4.0 microns 2.0 microns to 4.0 microns 0.1 micron to 2.0 microns 0 microns to 0.1 microns
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The following layers are associated w/skeletal muscles:Endomysium, sarcolemma, fascia, perimysium. Place them in order from superficial to deep
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What is the glomerulus?a. a part of the proximal convoluted tubuleb. a clump of capillaries that is located in the renal corpusclec. none listedd. the food vessels that filter urine just before it leaves the kidneye. a part of the distal convoluted tubulef. blood vessels found near the loop of Henle
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both euglena and cyanobacteria are photosynthetic unicellular organisms found in pond water. the feature that distinguishes euglena from cyanobacteria is the
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all three regions of the brain stem can be observed on the ventral surface of the brain. t or f
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Carotenoids always start out this color, then are changed by chemicals in the body to different colors?a. Trueb. False
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I need help to answer this!
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PLEASE HELP- Why should you wear a seatbelt using Newtons third law
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Which table best compares the events that occur during different stages of the cell cycle? A Phase. event. S. Phase. DNA replication. M. Phase. Nuclear division. B Phase. Event. S. Phase. Nuclear division. M. Phase. Cytoplasm division. C phase. event. S. Phase. cytoplasm division. M. phase. cell growth. D phase. event. s. phase. cell growth. m. phase. DNA replication.
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Why can the plasmids in DNA of some prokaryotic cells be considered dangerous? They are deadly They can be exchanged between cells They multiply quickly They make bacteria stronger
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12)genes q and p are linked and 20 map units apart. in the cross qp/qp x qp/qp what fraction of the progeny will be qp/qp
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when a cell divides and daughter cells are formed, what happens in terms of the dna in the nucleus in the daughter cells?
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consider a mouse population with a total of 500 alleles for a specific gene. how many individuals are in this population?
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what is cosmides and tooby's explanation for why people are good at certain types of reasoning using deontic conditionals
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when using the microscope for an intravaginal infection you see something translucent and colorless, what do you suspect?
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a woman tests positive for the covid-19 virus antibody but has no symptoms. she is considered a carrier. what component of the infection cycle does the woman illustrate?
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assume the scales of sunfish can be dark (dd), intermediate (dd), or light (dd). if a pond contains 325 dark, 130 intermediate, and 195 light sunfish, how many light sunfish would be expected for the population to be in hardy-weinberg equilibrium?
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according to the timeline of antimicrobial resistance, which antimicrobial drug had the shortest time span before microbes were identified that were resistant to it? choose one: a. cefotaxime b. ceftazidime-avibactam c. fluconazole d. methicillin
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a cline: a. is a gradual change in phenotype over a geographical area. b. is variation that falls into discrete categories. c. describes the pattern of occurrence of trisomy 18. d. was used to describe human variation as early as the renaissance.
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Receptors can be grouped into three classes1. Mechanoreceptors are stimulated by mechanical forces such as pressure2. Chemoreceptors detect chemicals or chemical changes3. Electromagnetic receptors react to heat and light energy
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The first individual of the new species would be very unlikely to find a mate.
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