science, biology

41,328 results, page 60
  1. Biology

    During transcription, when RNA nucleotides form base pairs with the DNA template, does this mean that RNA nucleotides and DNA nucleotides pair up?
  2. Biology

    Using Darwin’s Theory of Evolution, describe how Eukaryotic cells could have developed from Prokaryotic cells. What advantages would the Eukaryotic cells have over the Prokaryotic?
  3. Biology

    Can someone explain allopatric speciation and sympatric speciation. I know that allopatric speciation is because of geographic isolation. I don't understand sympatric speciaiton, though.
  4. biology

    would you consider that eukaryotic cells got rid of their cell wall to benefit as a heterotroph? They must of had a cell wall to begin with because all cells come from prokaryotic cells.
  5. Chemistry

    Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of
  6. BIOLOGY GR.12

    What are the differnt conditions for yest fermentation. i have to make a hypothesis and experment based on yeast fermentation. I WANT TO KNOW WHAT EFFECTS THE FERMENTATION. for example using a higher temp to put my yeast in will make the fermentation
  7. Biology (respiration)

    Okay...so its about glycolysis in ANaerobic respiration QUESTIONS 1* fructose 1 6 biphoshate or diphoshate (which one is it exactly?) 2* what is the molecular formula for fructose 1 6 di/biphosphate? SOME SITES say C(6)H(10)O(6)P and some say
  8. Biology

    What is the effect of carbon monoxide in the blood? I think its because carbon monoxide combines with the blood to form carbooxyhaemoglobin which reduces the amount of oxygen combining with haemogloblin.Hence a person suffers from lack of oxygen and
  9. Anthropology

    How does the identification of cultural universals impact our understanding of what it means to be human. How does the search for Universals help us better understand human cultural behavior? What examples for out own culture can illustrate the ideas that
  10. biology

    I need a site where I can find these ff microscopic images: a. allium cepa 1. interphase 2. metaphase 3. prophase 4. anaphase b. paramecium 1. interphase 2. metaphase 3. prophase 4. anaphase thanks in advance... facstaff.uww.edu/mckinnoj/Bio1Lb1bCell.doc
  11. Biology

    Which of the following is the muscle action that results in exhalation and causes the air pressure inside the lungs to be higher than outside the chest a) Contraction of internal intercostals b) Relaxation of the diaphragm c) Contraction of the diaphragm
  12. Biology of Environment

    Im having hard time differentiating b/w inductive and deductive reasoning. In inductive you find patterns, then you reach conclusion, in deductive you reach conclusion based on previous known facts, but i still not quite understand. I also not get the
  13. Biology

    We did this lab in which we used 3 brands of hand sanitizers and did the kirby bauer test. We measured the zone of inhibition for each of the three trials in millimeter. I need to make a graph, probably a line graph but im not sure what to put for the x
  14. career help

    one year ago This degree program is designed to prepare students to enter a career upon completing the degree with no further study required. Some are transferable to a state university program to continue education. Associate in Arts (AA) Associate in
  15. MATH

    LAMONT IS REQ TO READ 1 BIO, 1 SCIENCE, AND 1 POETRY BOOK EACH MONTH. HIS BOOK CHOICES ARE: 2 DIFF BIOS 3 DIFF SCIENCE 3 DIFF POETRY HOW MANY COMBINATIONS OF REQ BOOKS ARE POSSIBLE?
  16. biology

    Bromothymol blue (BTB) is a chemical that turns yellow in the presence of carbon dioxide. In the presence of oxygen, BTB stays blue. In his science class, Sanjay used BTB to test for the presence of those two gases in three situations. *Sanjay's Procedure*
  17. biology

    A toxin from a poisonous mushroom has been identified as a hydrophobic weak acid. It somehow can find its way to the inner membrane of mitochondria where it gets protonated on the outer surface of the membrane but deprotonated on the inner surface of the
  18. biology

    Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c? confused cuz transcription
  19. Biology

    a) Initial filtration occurs when blood pressure forces fluid out of the __________ and into __________. b) Blood enters the glomerulus through the __________ and leaves through the __________. c) Describe what normally passes into Bowman's capsule. d)
  20. Biology

    Need help with these 2-- 37. Wings, fins, and arms are limb adaptations that allow mammals to a. live in different environments b. attain diverse sizes c. nurse their young d. communicate with other mammals 38. Which characteristic is NOT widely adapted to
  21. biology

    Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions. what would this type of ATP
  22. BIOLOGY

    how does the structure of DNA contribute to the accurate transmission of hereditary material? hereditary material Not much help courtney. I'd say its structure utilizing vanderwahls forces allows it to have a quaternary structure which takes up less space.
  23. Biology

    37. Wings, fins, and arms are limb adaptations that allow mammals to a. live in different environments b. attain diverse sizes c. nurse their young d. communicate with other mammals 38. Which characteristic is NOT widely adapted to allow mammals to live in
  24. biology

    Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c? confused cuz transcription
  25. biology

    A person(between 11-17) gets up and goes somewhere after sitting 20 mins in a place then he stops at a place for his work but a blackish region surrounds his face for 5secs and he falls on the ground ?after 10secs he feels that now his brain is ok and he
  26. biology

    Identify the plant like protest phylum or phyla that these phrases describe a.lack a cell wall b.mainly multicellular members c.photosynthetic d.cell wall composed of silica e.nuclear envelope f.ancestors of higher plants I am not sure which belongs to
  27. biology

    The primary reaction catalyzed by catalase is the decomposition of hydrogen peroxide to form water and oxygen, which occurs spontaneously, but not at a very rapid rate. Write a balanced equation for this reaction. (Remember that catalase is not a reactant
  28. Biology

    Question states a made up organism and want me to classify it by kingdom , phylum and genus am i supposed to "make up" the genus since they are not real animals. an animal example is this Butter-roaches: genetic engineering created these butterfly-like
  29. biology

    Generally,mankind( I believe across all cultures) prefers to eat foods that are served hot or sometimes chilled.I have the impression that it should be more natural,beneficial and tastier to eat food as it is i.e. at room temperature, as what other animals
  30. biology

    what cells are involved in the diffusion of substances? (Broken Link Removed) All cells are involved in diffusion, across thier surfaces and between the intracellular orgelles and the intracellular fluid.
  31. Biology: Genetics

    How do nucleotides and hydrogen bonds affect the structure of DNA? Maybe something like nucleotides make up DNA and hydrogen bonds hold the nitrogenous bases together? Can you help me explain?
  32. biology

    Dihybrid cross what is the phenotype distribution of each: Dominant green seeds Recessive yellow seeds Dominant purple flowers Recessive white flowers ?
  33. biology

    how is the knee jerk reflex (like when a hammer hits the knee and the leg stretchs out) related to proprioception? if someone doesn't have proprioception why would their leg not move when it is hit by the hammer?
  34. biology

    Im carrying out an investigation on respiration, comparing the different rates in maggot tissue and mung beans. i was wondering if you could help me to find out why maggot tissue and mung beans are efficent to use?
  35. biology phenotypes

    If the parents are PPLLXppll, then the F1 generation is PpLl. Say that the F1 generation is crossed with PPLL. It would be a cross between PpLl X PPLL. Then what is the F1 generation or in other words what are the different gametes I can use to make a F2
  36. biology

    1.can introduced species strengthen the immune system of the native species 2. can an introduced species change thec composition of the natural habitat so it is unsuitable for the native species
  37. biology

    The height of a man grows on cell division.During cancer there will be uncontrolled mitotic division.That is cell divides continuosly.Does the height of the person increase when he get cancer.
  38. biology

    A Scientist gradually increases the amount of carbon dioxide available to a plant. The plants rate of photosynthesis increases at first, but then levels off. What else might the plant need to further increase its rate of photosynthesis?
  39. Biology- GI Tract

    I have a question regarding the gastric wall. Do the epithelial cells of the mucosa secrete substances directly into the lumen or do they secrete into the gastric pits then then from there the substances go into the lumen?
  40. Biology

    imaginary population of fruit doves, Half had purple head feathers and half had green head feathers. Describe how natural selection could act upon this population. What change might you see over time? (really need help with this, looked in my textbook i
  41. Biology Lab

    Can you please show me how to answer this question using C1V1=C2V2 A scientist receives a vial containing a protein at at concentration of 35mg/ml and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the
  42. Biology

    ***I read the textbook assignment and I have read all the information on the lesson, however I cannot find the answer to this question. Nor can I find anything written about it anywhere in the lesson. Please help a girl out.*** True or False? There are
  43. Biology quick help

    What is the method of nitrogenous waste removal for the following & choose between ammonia, urea or uric acid Tunicates Fishes Amphibians Reptiles Birds Mammals I think tunicates are urea and fishes are ammonia? But please help because I'm not sure and I
  44. Biology Research

    Hello, I have to analyse two research articles about how carbon dioxide affect plant growth. one of the questions I have to answer is to "compare the research approach" for the two articles. I am not completely certain what " research approach refers to"
  45. Grade 12 Biology

    I am confused about this question, and can't find anything on the internet, anyone care to explain? Why is the tertiary structure of an enzyme, such as amylase, so important? An enzyme is a protein, so is it really asking why is this stage important? And
  46. biology

    all life forms currently have a basic cell membrane so we presume that the earliest forms of life had this "fence" isolating the internal organization from the external chaos. It is likely that the primordial environment was acidic. In such a case, the
  47. Science repost for iiii

    science - iiii, Monday, October 29, 2007 at 8:08pm What test would you need to perform to prove that it is the combination of glucose and the Glucose Indicator Solution that changes color when heated and not just the glucose or the Glucose Indicator
  48. science project

    I'm filling out forms for my freshmen science fair project and I'm not sure what they mean by this question: Data Analysis: Describe the procedures you will use to analyze the data that answer research question or hypothesis HELP! Depends on the data. Most
  49. 6th /7th grade science

    i have 2 daughters which are in 6th/7th grade, both of them have 1wk left to turn in their science projects.I have been looking with them to find a good one but haven't been succesful,maybe due to this is my first time doing one with them.My income at the
  50. science (important project help!)

    im working on a science project which is what laundry detergent works best on stains and it was either between all oxi clean or tide. I need to present tomorrow so what if one of the questions they ask are to compare tide to the otheres which are oxi clean
  51. Biology

    MEIOSIS 1)name the process unique to meiosis that occurs during bivalent formation that may increase genetic diversity? 2)how are sister chromatic made and what is the structure that holds them together? 3)what do we call package of genetic information
  52. mathematics(pure), life science, business,tourism

    Hi i need help with career choice. I am currrently Grade 9. I choice the subjects Life Science, Buisness,Tourism and Mathematics(pure) Where can this lead me into? And what College/university can i study at? Please help if any potions available. Thnx
  53. Biology

    I hope you can help me with this question: "Imagine that you go to a party with a friend who starts drinking alchohol.Describe , step by step , the effects to that individual as he drinks more and more alchohol as the evening progresses and the long term
  54. biology

    1. Cystic Fibrosis is due to abnormal mucus-secreting tissue. Abnormal pancreatic secretions and respiratory problems will occur. This is an autosomal recessive disease. The mother and father are carriers for the disease. A. What is their genotype? B. What
  55. cell biology

    Motor proteins such as as kinesin and dynein move along the cytoskeleton using the energy generataed from the hydrogen________, this phosphorylated nucleotide. a. GDP B. GTP C. ATP D. ADP i THINK THE RIGHT ANSWER IS "C" PLEASE CHECK Since this is not my
  56. biology

    Cells such as neurons, which rarely if ever divide, can be explained as __________. A) being in the G0 phase of the cell cycle B) unable to activate apoptosis C) being in the G1 phase of the cell cycle D) having no active cell cycle I'm pretty sure it's A
  57. Biology

    In the small intestine, the digestion of food molecules is completed and absorption occurs. Structures from the circulatory system are associated with the small intestine. Explain how these structures assist the small intestine in its function.
  58. Biology

    Which of the following would be the most sigificant between mitosis and meiosis? A. Chromosomes are duplicated before mitosis B. Meiosis is not followed by cytokinesis C. Homologous Pairs of chromosomes are split up in meiosis. D. Crossing over occurs in
  59. Art Question

    When children draw cross-sections of plants, they are: 1. intergrating science and art (Or) 2. intergrating mathematics and science Lordy. Surely you have some thinking on this, this question hardly stimulates the cerebral cortex. Did you mean integrating?
  60. Math

    The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 90 said they had taken physics, 138 said they had taken chemistry and 45 said they had taken both. Thirty-two said
  61. Science

    As an environmental science teacher, how would you respond to someone who tells you (a) that he or she does not believe in biological evolution because it is “just a theory, “ and (b) we should not worry about air pollution because through natural
  62. biology

    Cells can conserve energy and resources by making proteins only when they are needed. Which of the following levels of control is the most energy-efficient? a. transcription regulation b. degrade the mRNA after it is made c. prevent translation of the mRNA
  63. Grade 12 Biology

    I am confused about this question, and can't find anything on the internet, anyone care to explain? Why is the tertiary structure of an enzyme, such as amylase, so important? An enzyme is a protein, so is it really asking why is this stage important? And
  64. biology

    People with a lactose intolerance are able to take products such as Lactaid that contain the lactase enzyme with their meals. These products can be taken in pill form. Considering the fact that the pill form of the enzyme would have to travel through the
  65. Music Video Project

    Hey guys! I am in a bit of a dilemma. I am doing a music video project for my AP Biology class and My topic is GENE REGULATION! I have no clue what to sing for it. What could be a good chorus? hook? What should be the most important to include in my song
  66. Biology quick question

    What is the method of nitrogenous waste removal for the following & choose between ammonia, urea or uric acid Tunicates Fishes Amphibians Reptiles Birds Mammals I think tunicates are urea and fishes are ammonia? But please help because I'm not sure and I
  67. Biology -Nervous System

    While examining the victim of a serious car accident, a physician lightly pokes the patient's leg with a needle. The pokes begin near the ankle and gradually progress toward the knee. Why is the physician poking the patient? Why begin near the foot?
  68. Biology

    Which of the following is true of an exergonic chemical reaction? A.Reactants lose mass as products are reformed B.Bonds are broken in reactants and new bonds are formed in products C.No activation energy is required to initiate it D.The energy released is
  69. Biology

    Suppose that a species of toads is introduced into a new environment in an attempt to reduce the population of insects. The toad has no natural predators in the new environment. The toad population would most likely? A)increase exponentially. B)increase
  70. Biology

    What are 2 reasons for a species to become threatened or endangered? Usually a change or restricting a habitat will cause a species to become threatened or endangered. Also -- when new predators are introduced or old ones become more powerful, native
  71. biology

    Genetic question If a man with blood type A, one of whose parents had blood type O, marries a woman with blood type AB, what will be the theoretical percentage of their children with blood type A?
  72. Biology

    What is the difference between an environment with freshwater and an environment with pristine wates? I need to design an experiment with a shrimp that is found in freshwater but not in pristine but I don't understand what is the difference between the
  73. Biology

    How do you find out how many tRNA are in a sequence? How do you name a RNA? http://en.wikipedia.org/wiki/Transfer_RNA http://en.wikipedia.org/wiki/Translation_%28genetics%29
  74. biology

    If the surface area of a cell that is shaped like a cube increases 100 times, it volume increases about a. 5 times b. 10 timesc. 100 times d. 1000 times***
  75. biology please help

    explain how the small intestine is speicalized for digestion and absorption my answer the small intestine, is where the major part of digestion and most of the absorption takes place.
  76. biology

    the index of refraction of h2o is 1.33. find the angle of refraction of a beam of light in air hitting the h2o surface at an angle of 60 degrees n(air)=1.00
  77. Biology

    Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. How many cells do you expect will be in this 20 microliters drop you placed under the microscope?
  78. Biology/Physiology

    What organs of the human body are involved in the urinary system and what is the specific purpose of those organs? How does the urinary system interact with other systems within the body?
  79. Biology

    What differences would you expect to see in a population made up of individuals whose chromosomes experience crossing-over frequently compared with a population made up of individuals whose chromosomes do not cross over?
  80. Biology

    Can you help me find statistics on the amount of people who suffer with genetic disorders/diseases every year or the amount of people who die from genetic disorders. Thanks a million.
  81. Biology

    If it happens that a neurotransmitter binds to a receptor site and produces a negative voltage, the probablity: A) that the neurons are densely connected increases B) of an excitatory response increase C)That the receiving neuron will fire decrease D)that
  82. How get caramel in caramilk bar

    my sister have this question for biology how they get caramel into caramilk bar? she think the inject it in there, but she want to know how they do it.
  83. Biology

    How does an onion stores its carbohydrates? Why? What part of a plant is a potato? What part of a plant is an onion?
  84. Biology

    some proteins (such as HBB) can vary quite a bit from species to species. others (ex., tubulin) vary little from species to species? Why?
  85. biology

    What is the relationship between mass, weight,and gravity? Mass and gravity determine your weight? correct
  86. Biology

    The function of diastase and how it is affected by temperature. I got the function.. but i don't know how temperature affects diastase
  87. Biology- Taxonomy Project

    Distinguish between the schemes that use Domains with those that use Kingdoms. I don't know where to find this stuff. Thank you in advance http://faculty.plattsburgh.edu/neil.buckley/Concepts%20in%20Biology/Lecture6DomainsandKingdoms.htm vashex cnfsaor
  88. Statistics

    Hi - I have some data from a biology experiment that I need to find out if it is significant and I don't know what test to use - maybe Anova - but I am not sure which variables are which. I used 4 levels of light (from dark to bright). 30 sandflies. At 4
  89. College biology

    In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey
  90. Pre-Ap biology

    After an organism is gully grown, cell division continues to function in renewal and repair, replacing cells that die from ________________ During the growth phase (for a cell) known as _____________...is this one interphase? The mitotic phase itself
  91. College biology

    In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey
  92. Biology (multiple choice!)

    I'm studying for a test and can't find the answers for the following questions...please help! What clade of bacteria produce oxygen via photosynthesis? What is a synapomorphy for domain Bacteria? In a symbiotic relationship between organisms of
  93. Biology

    If a human needs to eat about 10 000 kJ per day, estimate (to the nearest gram) the mass of phytoplankton that would be required to meet their daily energy requirements. Based on this value, approximately what proportion of her own body weight in
  94. biology

    what be the greatest visual magnification ahieved with normal kind microscopes like compound type? that be 1000x. but how you can determine this for any microscope? what be the depth of field? and what power be depth of field the smallest? what power an
  95. I need ideas for a Math Project (science related)?

    So I was given a math project in which we need to gather "real world information" and make a scatter plot of the info. With this we must graph a line, parabola and exponential curve of best fit then find those formulas. The math is straight forward but I
  96. 7th grade science

    In a science-fiction TV show several years ago, the hero spent the entire 40 min fretting about running out of fuel before he could pilot his spaceship back to base. Time and again the camera cut from his worried face to the blasting rockets, to the
  97. Science 7R - Homework Check (Q3)

    What's the function of a dichotomous key? My Answer: Dichotomous Key use by scientists are arranged in steps with two descriptive statements at each step. Is my answer to this question is correct??? BTW: I got this answer from my textbook in that section
  98. Science?

    I'm doing a science experiment where I have to light an object on fire to do the experiment.. It can't be oil or electrical fire. So I need some objects I can light on fire. Such as a candle. But I can't use this one
  99. Biology

    Assume you had a round seed garden pea plant and you wanted to find out whether the round seed plant was homozygous or heterozygous. What would you do? (Round is dominant to wrinkled seed)
  100. Biology/History

    Where did the Spanish Flu start? Not geologically, but who or what did it start from? Since we called it an infulenza pandemic did it start from a bird? And once this flu was transmitted to a human how could another human catch the flu?