science, biology

40,893 results, page 56

  1. biology

    In Angus cattle, the fur color black (B) is dominant to the color red (b). If we cross a homozygous dominant bull with a homozygous recessive cow is it possible for the offspring to be red?
  2. science

    how do different liquids affect egg shells? Sounds like a worthy science project. Why don't you try some liquids and find out? Some might dissolve or soften them, some will change their color. wwell it depends on what type of liquid your useing like soda the acid in it will ...
  3. Math

    Diegos class planning a field tripfor 25 students.They will go to aquarioum and then to science museum. Each ticket for science cost $2 more than each ticket to aquarium. Lunch for each student is $5 additional. Write and expression for total cost of trio.Describle the meaning...
  4. Science

    Lesson 4: Behavior Science 7 B Unit 2: Interdependent Relationships in Ecosystems 1. Which type of behavior is illustrated in the following series of images? 2. Which of the following helps ensure a groups access to resources it needs for survival? 3. Which of the following is...
  5. biology

    If two parents who's blood types are both B produce a child that has blood type O, what can you say about the parent's genotypes? A. one is ii B. one is IBi C. both are IBi D. nothing, this is impossible isnt this C?
  6. BIOLOGY

    A reference calls for the use of "one litre of 0.1 molar acetate buffer pH 5.2” Calculate the amounts of sodium acetate and acetic acid required to make up this buffer, given that for acetic acid Ka = 1.8 x 10-5
  7. biology

    Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)?
  8. 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?
  9. biology

    will the impact of removing all the organisms in a trophic level be different for different levels?can the organisms of any trophic level be removed without causing any damage to the ecosystem?
  10. Biology

    What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain your observations by discussing this reaction on a molecular level.
  11. Biology

    Prokaryotes produce 38 ATP per glucose molecule and eukaryotes produce 36 ATP why? I know that the two are lost, but I am not sure if it is in the processing of the sugars or the transport? Does anyone know where these two are lost or why?
  12. 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.
  13. biology

    After a meal rich in starch, the blood with the highest concentration of sugar would be in what blood vessel? What are the 2 blood vessels containing blood with the highest concentration of oxygen?
  14. 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.
  15. biology

    Butane gas (C4H10) is burned to produce carbon dioxide and water vapour. If 12.8 mol of butane are completely burned, how many moles of water vapour are produced?
  16. Biology

    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?
  17. Biology

    The major vein that delivers blood from the lungs to the heart is the femoral vein. inferior vena cava. superior vena cava. pulmonary vein. jugular vein.
  18. Biology

    Alright, last ones on the test: 37. Hyphae a. increase the surface area-to-volume ratio of the fungus b. have slender filaments c. allow for efficient uptake of nutrients d. all of the above D? 38. In which process do tRNA molecules attach amino acids to the growing chain ...
  19. biology ms sue

    which of the following is an example of human-caused durbance to an ecosystem a. a tsunmi destroys a coastal forest and causes flooding b. a river is diverted to irrigate farmlands during a drought* c. after a volcanic eruption, global avarage temperatures lower d. the snow ...
  20. Maths lit,History,Life Science and B.S.

    What career should I take with these subjects. Maths Lit, Business Studies , Life Science and History?
  21. science

    1) what is the mass of 10 cc of water? 2) why does a block of wood float on water? 3)how and why can density by used to identify an unknown substance? 4) describe the relationship between density, water, an d things that float please help me just need these answers to study ...
  22. biology

    Could a man with type B blood and a woman with type AB blood produce a child with type O blood? Explain
  23. Anonymous -- Science question

    Anonymous -- Please click Post a New Question and then ask your question. Please be specific about the purpose of your science project, your grade, and the type of project that interests you.
  24. Biology

    Are any of these anabolic reactions? a. making starch from many glucose molecules b. making proteins from many amino acids c. making many glucose molecules from many glycogen molecules Since this is not my area of expertise, I searched Google under the key words "anabolic ...
  25. Biology

    Why does Beta Glucose chains have more weak bonds between the chains than there are between alpha glucose chains?
  26. IB Biology/Biology

    Web feet is a sex linked characteristic in Dingbats. Female Dingbats are XX and males XY. A webbed male is crossed with a homozygous normal female and the baby Dingbat is a female with normal feet. Deduce whether the web allele is dominant or recessive. If their next baby is a...
  27. biology

    How is recombinant DNA technology used today? I have to use bacterial chromosomal or genomic DNA,plasmid,restriction enzyme, vector, sticky end, transformation, DNA ligase, gene cloning,restriction fragment, and restriction site in the answer.
  28. biology

    The mouth, small intestine, and kidneys have functions that involve the a. digestion of food, synthesis of vitamins, and filtering of the blood. b. intake, digestion, absorption, and elimination of food and its wastes. c. secretion of bile, digestion of food, and reabsorption ...
  29. Biology

    Why does the blood go from the lungs to pick up oxygen and then return back to the heart to be pumped around the body ? Why can't it just get out of the lungs from the first pump and then pick up an artery and go around of the body instead of returning ?
  30. Biology

    Transport Through the Cell Membrane Type of Transport Requires Name of Transport Protein Used Energy Transp- Input from ort Cell? Simple Diffusion Facilitated Diffusion Active Transport
  31. Biology/Chemistry

    Consider that the human brain weighs about 1 kg and contains 10^11 cells. Assuming that each cell is entirely filled with water, and knowing that 1 cm^3 of water weighs 1 g, calculate the volume of a brain cell (in picoliters).
  32. Biology

    If there is crossing over between two gene loci A and C occurs in 20% of the tetrads and between C and B in 10% of an individual of genotype ACB/acb, what would be the percentage of gametes of double cross over types (AcB/aCb) ?
  33. Science

    Astrologers relate the location of stars and planets to events in human lives. Many years ago, people classified astrology as a science. Why do modern scientists consider astrology to be a pseudoscience A. Astrology does not involve the use of telescopes. B. Astrology does not...
  34. Biology

    In the course of performing and interpreting daily vaginal lavages in a rat, a rat that had previously been exhibiting regular 4 day cycles starts a prolonged period of acyclicity which is dominated by cornified epithelial cells. A male rat also co-habits her cage, but is ...
  35. biology

    When an impulse moves down the axon, a. sodium ions first rush out of the cell. b. a small part of the axon momentarily reverses its polarity. c. the resting potential of the cell does not change. d. potassium ions are pumped into the axon. B?
  36. Biology

    Why can viruses of the family of the Poxviridae be genetically modified more easily than viruses of most other viral families? A. Because their genome is smaller. B. Because their genome is made of DNA. C. Because their genome mutates more slowly. D. Because their genomes have...
  37. biology

    i need help writing sentences with the following words? autotroph diversity eukaryote heterotroph indigenous infer prokaryote stimulus sustainability I would look the words up to be certain on the meanings: I would use your text definition first, if available. We can check ...
  38. Microbiology- Biology 205

    Can someone please help me with this question.... When you blow bubbles into a glass of water, the following reactions take place: H2O + CO2 --a--> H2CO3 --b--> H+ + HCO3- 1. What type of reaction is a? 2. What does reaction b tell you about the type of molecule H2CO3 is...
  39. 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 Poisson statis...
  40. 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 Poisson stati...
  41. Biology

    Research and discuss an event in Charles Darwins' life that lead to his theory of evolution. Events could be directly in Charles Darwin's life or could be individuals whose ideas Darwin incorporated into his work. Besides the voyage to Beagle and the visit to the Galapogos ...
  42. biology

    Dihybrid cross what is the phenotype distribution of each: Dominant green seeds Recessive yellow seeds Dominant purple flowers Recessive white flowers ?
  43. 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.
  44. biology

    three and 14c have different number of isotopes of carbon 12c 13c and 14c have different number of electrons protons neutrons
  45. Math 156

    On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 32 questions correct. What was the percent of increase?
  46. biology

    In sheep, the allele for white wool (A) is dominant over the allele for black wool (a). How would you determine the genotype of a white ram, or male sheep?
  47. 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
  48. College Math

    Movies A survey of 350 customers was taken at Regal Cinemas in Austin, Texas, regarding the type of movies customers liked. The following information was determined. • 196 liked dramas. • 153 liked comedies. • 88 liked science fiction. • 59 liked dramas and comedies...
  49. giving up

    i'm depressed that no-one has answered my science question so i'm giving up and i don't care if i fail my science because it will be all googles fault the only thing i know about the xenon 135 is that it's a tennis/squash racket and i needed the element xenon 135 grrr p.s....
  50. Genetics (science)

    Please answer my science question (in detail if possible) Q: in rats the gene for black hair colour is dominant over the gene for brown hair colour. Draw a plunnet square and use it to predict the fractions of both the genotypes and phenotypes produced when two heterozygous ...
  51. 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
  52. 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?
  53. Biology

    The process that traps solids in the cell membrane and brings them into the cell is called: pinocytosis phagocytosis ion pumps I think it is phagocytosis because pinocytosis brings in fluid and dissolved substances. I'm not sure if I'm right
  54. Biology

    Which of the following will happen if mRNA fails to be translated? A The cell's nucleus will produce more chromatin. B. Ribosomes will not be able to create protein. C. Mitochondria will release ATP. D. The cell will produce more mRNA I think it's B
  55. science

    i need help with these questions because i need to write a report on it helpp please What are the implications of stem cell reasearch for today and future generations What are stem cells? What are they capable of? How are they used in science/ medicine presently? What ...
  56. Science Please Check

    Please Check 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...
  57. Science

    We are doing a science fair and we are unsure of what our aim/investigation should be. However we know we want to do something with fingerprints. What can we do? Why don't you examine the prints of twins? Why don't you examine the prints of twins? What? Compare the ...
  58. science

    I have a science experiment and I'm not sure how to do this or have all the materials to do it can anyone help? For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and a strength of a solenoid. Once you have an ...
  59. Biology

    I am doing a chart on function and structure and i am stumped by this question Modified cell products must arrive to specific docking sites—where they are necessary— What structure tells the vacuole to dock where it needs to? - Would this be the nucleus, the nucleus has ...
  60. biology

    At one time the continent of Australia was connected to Asia. About 50 million years ago Australia became separated. It has many unusual animals not found elsewhere, such as the Kangaroo and the Koala bear. Using the concepts of geographic isolation and gene pool , explain why...
  61. Biology

    In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances of their children ...
  62. math (stats)

    A biology professor gives a surprise quiz consist of a true/false question followed by a multiple choice question with four possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Please show your work.
  63. Biology

    What are two traits of an information source that may indicate the information given is scientifically unreliable? Answer: peer review does not necessarily indicate that the other field expert reviews are in agreement with conclusions of the original writer, and a well ...
  64. Biology

    What are two traits of an information source that may indicate the information given is scientifically unreliable? Answer: peer review does not necessarily indicate that the other field expert reviews are in agreement with conclusions of the original writer, and a well ...
  65. Biology; PLEASE I NEED THIS ANSWERED QUICKLY!

    1. Fill in the five levels of human body organization. ~~~ Not sure what it's asking for me to do. Is it asking for me to name the most important body systems? Because in that case EVERY SINGLE ONE comes to mind. Just need a simple explanation and I'll be on my way. Thanks in ...
  66. Biology

    The polymerase chain reaction (PCR) is useful for: A) making many copies of a small amount of DNA B) creating recombinant plasmids C) analyzing a person’s fingerprints D) cutting DNA into many small pieces E) allowing restriction enzymes to cut DNA at palindromes I can't ...
  67. Biology

    You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make large amounts of protein A, but it is in the form of an insoluble aggregate with no enzymatic activity. Which of the following procedures might help ...
  68. biology

    An individual with the genetic condition cystic fibrosis has CFTR protein with the amino acid histidine (at position 482), where the normal CFTR protein has arginine. (No other changes are observed in the protein.) This is the result of a _________ mutation. Select one: a. ...
  69. Science

    What's the vocabulary word for the definition (application of biological science to create new products) http://en.wikipedia.org/wiki/Applied_Science
  70. Physical science

    Physical science a 2.0g metal ball that carries a charge of 10 uC is placed into an electric field. the ball at rest at point A is accelerated to point B with a speed of 1.0 m/s. what is the electric potential difference between point A and point B?
  71. 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.
  72. Biology 110

    Displacement of O2 from its respiratory pigment: A. occur more rapidly in cold temp. B. occur more slowly when Ph alkaline. C. occur more slowly when O2 tissue level low. D. none of these.
  73. 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?
  74. Biology

    From the problem above, which fish would be most likely to die when dropped into hot water at 30 degrees Celsius, a fish acclimatized to 4 degrees C or a fish acclimatized to 16 degrees C?
  75. Science

    I have to do an assignment on designing an animal that has adapted to life in the waters of the dead sea. But nothing can live in the dead sea so I don't know what to do. Can anyone help with suggestions? What about a micro organism? There are bacteria that can live in the ...
  76. College General Biology

    A man who is a non-tongue roller (t) marries a woman tongue roller (T) whose father was a non-tongue roller (t) - what would the expected genotype and phenotype percentage for their offspring?
  77. 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)
  78. 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
  79. Biology

    A team of researchers do not use a full gene, but use a shortened version .. (which is coded for all necessary amino acids) Can anyone describe how the shortened version of a gene may be obtained ?? or provide a source to help please Thank you .... Totally stuck !
  80. Biology

    c. The cytoskeleton of eukaryotes serves many functions. One of these functions is served in eukaryotes by a different major structure. Which structural feature is it? How do these different structures serve the same function in the two cell types? Is it the cell wall? Thanks -MC
  81. biology

    i am researching an article and am having trouble understanding the title. can someone please explain to me in simple terms: Deficiency of a Beta-arrestin-2 signal complex contributes to insulin resistance. so what is a beta arrestin 2 signal complex?
  82. Biology

    1. Sponges a. are nonsymmetrical and have oscula b. lack organization into tissues and organs but have specialized cells c. possess cells that are capable of recognizing other sponge cells and have a simple digestive system d. both a and b I'm so confused on this question, ...
  83. Biology

    What structures of the embryonic and adult anatomy of manatees and elephants establish the evolutionary relationship between these two animals? manatees evolved from elephants..or elephants evolved from manatees
  84. Biology Raynaud's Disease

    Hey im doing a powerpoint presentation on this raynaud's disease, and could someone please give me some good sites to go through to get info abt this and please mention anything you know about the raynaud's disease as well, thanks.
  85. biology

    What is the effect of enzyme concentration on enzyme activity? Explain how enzyme activity changes as enzyme concentration decreases, and discuss why this occurs (on a molecular level).
  86. math

    On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 35 questions correct. What was the percent of increase?
  87. 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
  88. Biology

    The function of a protein is determined by its ? Answer: shape The shape of a protein is determined by the ? of its ? ? First answer : ? Second two answers : primary structure
  89. biology/evolution

    many of the orchids alive today have nectar that doesn't have any sugar in it. Why are there presently-living orchids whose nectar lacks sugar?
  90. Biology

    A heterozygous brown eyed (Bb) parent and a homozygous brown eyed parent (BB) have offspring. Which of these genotypes would not occur in their offspring? A. bb B. Bb C. BB Not positive but A?
  91. Science

    I have a science project du and im trying to look for a problem on why the sky is blue. I know that why the sky is blue is a question but i cant find the actuall "problem" The sky is blue because of Rayleigh scattering. I know of no problem with that fact.
  92. 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 production be called?
  93. Biology!!!!!!!!!!!!!!!!

    In preparing some blood for observation with a microscope, a student puts a drop of blood into a test tube containing 2 cm3 of water. After mixing, he examines a drop of the mixture. Explain why he cannot see any blood cells under the microscope.
  94. Biology

    you are studying a single-gene locus with two alleles in a population that is in Hardy-Weinberg equilibrium. Examination of a large sample of individuals from the population reveals there are six times as many heterozygotes as there are homozygote recessive individuals in this...
  95. biology 30

    suppose that sample of beef broth initially contains 16 bacterial cells. after 4.0 h, there are 1.6 x 106 bacterial cells in the sample. calculate the growth rate of the bacterial population for the given time interval. (record your answer in scientific notation: x x 10n )
  96. 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?
  97. 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
  98. Biology (Please, Help Me!)

    Please, help me! Differentiate a logistic growth pattern from an exponential growth pattern.
  99. Biology

    What is a characteristic that not all craniates have? Do all the Craniates have a vertebral column?
  100. Science Fair Project

    I need help thinking of a topic for an highschool science fair project the actual topic not a link please i really need help thinking of one Testing the water in your school for lead. DOES SODA LOSE IT;S CARBONATION FASTER AT LOW OR HIGH TEMPERATURE
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