science, biology

41,099 results, page 54
  1. biology

    When do strands of DNA form chromoshomes? What is a replicated chromosome? How does this differ from a chromosome pair? Is a cell containing replicated chromosomes haploid, diploid, or neither? Why? and Why is anaphase unique in terms of chromosome number?
  2. Biology

    In peas, tall plants (T) are dominant to short (t), purple (P) is dominant to white flower color (p), and round seeds (R) are dominant to wrinkled seeds (r). What is the phenotype of a plant with genotype TtppRr?
  3. 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
  4. 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
  5. Biology

    Transport Through the Cell Membrane What transport protein was used in simple diffusion, facilitated diffusion, and active transport?
  6. Biology

    When a normal female (XX, +/tra) Drosophila is crossed with a normal male (XY, tra/tra), what would be the percentage of males ?
  7. Biology

    For the DNA sequence given below, write the complementary DNA sequence that would compliment the double-strand DNA 3'--ATTGCTTACTTGCATGGTACCTCTAGCGTTTAGGC--5'
  8. Biology

    GRey flies are dominant to black flies. Make a cross between two flies expected to have all black offspring:
  9. biology

    am a fruit, remove my first letter i become a crime, remove my first and last latters i become a genre of music, remove my first two letter i become an animal.what am i?
  10. biology help

    Is photosynthesis only occurring during the daytime? What happens when there is no light? What is the relationship between light dependent and light independent reactions in photosynthesis?
  11. biology

    Red is dominate over blue, give the genotype for an individual who is heterozygous red, homozygous red, and blue.
  12. biology

    1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth
  13. Biology

    Explain why ice forming within a living organism may result in its death. Candice/ Michelle (Whoever you are) I think if you read the link I left above for you, it will be clear. Hint* If ice expands when it freezes and the cell wall/membrane can't
  14. Finite Math

    A biology quiz consists of 10 multiple -choice questions. 7 must be answered correctly to receive a passing grade. If each question has 4 possible answers, of which only one is correct, what is the probability that a student who guesses at random on each
  15. 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
  16. Biology

    1. Prior to sowing rice,a legume crop was cultivated and ploughed back in the field,why? Explain. 2. What is a flower?Describe the parts of a typical angiosperm flower. 3. Write zoological name of the following: (a)Elephant (b)Lion. 4. "There is clear
  17. Biology

    A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large
  18. Biology

    In a mycorrhizal relationship, what benefit does the plant get from the fungus? a. an energy source b. aid in seed dispersal c. products of photosynthesis d. aid in the absorption of water and minerals<-- (My Answer) Please help me, i'm having trouble
  19. 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
  20. Science project fair

    Hello: My daughter is in 4th gde and is about to turn in her displayboard but we are not coming up with a good title. She wants to title it "Flowers with sweet tooth". In her science projct she has discovered that sugar helps cut flowers live longer than
  21. biology

    Use a hypothetical organism with a diploid adult and describe the chromosomal make up of the eggs that would result from two different nondisjunction errors in meiosis. If normal sperm fertilized these eggs,what would the chromosomal makeup be of the
  22. Biology

    Ok i have three questions that i can't find anywhere... 1. Carbon dioxide and water are excreted here during exhalation. 2. Structures in the skin which excrete water. salts, and some urea. 3. Removes toxic substances from the blood and converts excess
  23. biology

    I have to write an essay on about why organ donation should be mandatory in Canada. I need help thinking of arguments. Some that I have thought of are: 1. there is a shortage of organs for transplants 2. it improves the life of the recipient 3. After death
  24. biology

    please help me with these to questions! The trait that viruses share with living things is the ability to a. adapt. b. use food. c. respond. d. reproduce. and Some viruses cause the host cell to reproduce both itself and the virus. Groups of these cells
  25. Biology

    Describe four ways that plants protect themselves from environmental conditions using one example from each of the following categories: a. hormone b. tropism c. plants structure d. plant process In your answer be sure to include the specific threat and
  26. Biology

    This is a 2 factor cross punnett square- An albino, nonhemophilic man, marries a normally pigmented, nonhemophilic woman whose father was hemophilic and whose mother was albino. What kind of children can they have and in what proportion? Hemophilia is a
  27. Biology

    After a family picnic,Ella dumped the ice and rock salt from ice cream maker in the back yard.that area of yard now contains dead,brown grass. Explain why this happened using word plasmolysis in your explanation.
  28. Biology

    Which of the following is the purpose of valves in the venous circulatory system? A. Promoting movement of oxygenated blood toward the heart B. Facilitating stasis of blood in the veins C. Propelling blood through the vena cava D. Preventing backward flow
  29. Biology

    1.Which of the following is a renewable resource? A.wind B.fossil fuel C.minerals (D.land) 2.The goal of -------is to use cells and tissues to treat human illnesses or injuries. A.clone therapy B.therapeutic cloning (C.reproductive cloning ) D.gene therapy
  30. Biology

    What do glycolysis, the Kreb's cycle/citric acid cycle, and the electron transport chain have in common? A the production of ATP*** B the process of trapping solar energy C occurrence of each within mitochondria D the process of breaking down sugar
  31. 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
  32. Science

    how can models help in science, why they are important, what and some examples of models.
  33. math, science

    what are the difference and similarities between math and science
  34. Science

    What is apparent brightness and absolute brightness in Science
  35. science

    5 letter science word, with the 4th letter o
  36. social science

    What is an example of an interdiciplinary social science? explain please
  37. Science

    Could someone please check me previous before previous Science post, thanks
  38. psychology/science

    how may psychology be understood as both science and art
  39. English

    1. I like science but not math. 2. I like science but I don't like math. Does #1 mean #2?
  40. Biology

    For one of our lab sessions, we had to isolate DNA from E. Coli bacteria. During one of the steps in the isolation process, we had to use SDS(Sodium lauryl sulfate) at 60°C. One of the questions was: Why do we use SDS, and why at this temperature. I
  41. Science

    hello my exams are just going to start and i don`t have science book because it`s not available in shops so for standard 6 can you give me some information in these topics: 1. Interdependence and Adaption 2.Scientists in the book scientists` topics are
  42. Science

    I need some ideas for a science project. I need to find a picture of an everyday object which has a similar job or function as that cell part. For example, the nucleus is like a brain. My list includes lysosome, golgi body, cell membrane nucleolus,
  43. Earth Science

    I am struggling with these two questions I have looked all over the internet && even my science book but still no answers...thank you to anyone that can help. ♥ What is unique about Earths position in the Solar system as it relates to water, and why
  44. Biology

    Could someone help me with this question; Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning of enzymes in these organisms. Suggest some ways
  45. biology

    how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an
  46. Biology

    Which of the following is a NOT function of a vacuole? packing of materials transport of materials storage of materials breakdown of materials I'm confused. I know that vacuoles store materials, in other words, C is not correct since it's true. But the
  47. 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
  48. Science

    Which of the following are examples of science? Mark all that apply. A. a journalist writes a story about a man who became rich by buying stock on Tuesdays B.a woman chooses an item to purchase based on its packaging C. a farmer consults a weather almanac
  49. biology

    You are gardening and accidentally puncture your arm with a nail that was in the soil. No significant occurred but your arm was swollen. Recall that soil contains many microorganisms that could be pathogenic. Describe in detail the nonspecific and specific
  50. Human Biology-Birth Defects

    Hey I'm doing a report on clubfoot and I just researched this about it: "Complex segregation analyses suggest that the most likely inheritance pattern is a single gene of major effect, operating against a polygenic background." what does it mean by
  51. BIOLOGY - HELP URGENT!!!!

    How do the following terms relate to one another with respect to a single genetic locus? - Wild Type Allele(s) - Mutant Allele(s) - Gene Product(s) - Population - Genotype - Phenotype - Dominant Allele - Recessive Allele - Individual - Number of different
  52. Biology

    How are proteins, lipids, and polysaccharides similar? A) They contain the same atoms are types of bonds between atoms. B) They are natural polymers composed of repeating monomeric units. C) They are formed during exergonic metabolic reactions in a cell.
  53. Biology

    Evolution by artificial selection is a common way by which people breed plants and animals to have characteristics that we find desirable. Imagine that you are working in a lab where scientists are trying to breed a strain of apple that has much higher
  54. Biology

    after a severe cut, a patinets symptoms were recroded as following: i.weak pulse ii.rapid pulse iii.lower body temprature iv.slightly blue or dark discoloration of the fingertips Explain how blood loss casued each of the above symptoms.
  55. Biology

    if a person has stooped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of carbon dioxide/oxygen?why? Smoking, air pollution and altitude all affect the rate of respiration. Explain the effects
  56. Biology

    Describe two practical applications for being able to extract DNA from cells. Genetically engineering insulin producing bacteria Crime lab testing of blood (white cells have DNA) and semen what are some biome characteristics for a freshwater wetland
  57. Human and Social Biology

    In guinea pigs short hair S,is dominant to long hair. A heterozygous guinea pig mated with a homozygous recessive pure breed. State the proportion of the geno type and the phenotype of the offspring
  58. Biology

    I was wondering if someone could please explain this to me (please don't give me links to websites, I already have a thousand saved under my favourites, I just don't understand how to find my answer from the information the websites have provided).
  59. Biology

    I had to observe slides of onion root tip to study plant mitosis. And the question I have to answer asks,if your observations had not been restricted to the area of the root tip that is actively dividing, how would your results have been different? I
  60. biology

    Explain how you might determine the role of an essential developmental gene using the following as a guide: *use of model organism? Why? *Use of conditional knockouts/knockouts/hypomorphic allele/null allele/ RNAi? Why? *locate its products, mRNA and
  61. biology

    Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?
  62. biology: chitinase

    In an experiment I did, Serratia marcescens grew really well in the Sherry cooking wine I used. Is this because the chitinase that the Serratia marcescens producing binds the carbs with the alcohol?
  63. Biology

    Humans have about 20,000 genes in our genome. Explain how cells differentiate into different kinds of cells even though they have the same set of 20,000 genes in their nuclei, so they are genetically identical.
  64. Biology

    Our most potent weapon in the fight against viruses is: 1.Antibiotics and sulfa drugs 2.Vaccinations 3.Gene therapy 4.Sulfa drugs 5.Antibiotics I don't know if it is 2 or 5. I am thinking more 5 but then I think about 1 also. Someone please help.
  65. Biology

    Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?
  66. Biology

    Why (in detail please) in the carboxypeptidase mechanism, the weak bonds between an enzyme and a substrate will stretch the peptide bond of the substrate which lowers the bond energy? I just want to know why in detail this happens... Thank you.
  67. Biology

    Describe the G protein receptor system and the tyrosine-kinase receptor system. Explain how these two systems are similar and how these two systems are different, in terms of structure and function please.
  68. Biology

    A bricklayer has an assistant who brings bricks to the bricklayer so she can build a wall. What part of translation most closely resembles the assistant's job? What do the bricks represent?
  69. Biology

    What are five specific examples of Interdependence from the book "Silent Spring" by Rachel Carson? OR What are examples of steps in the scientific process found in "Silent Spring"?
  70. 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 ?
  71. biology

    Albinism (lack of pigment) is caused by a recessive allele in humans. If normal parents have an albino child, what is the probability that their next child will be normal for pigment?
  72. biology

    In a population with two alleles, B and b, and the allele frequency of b is 0.4. Calculate the allele frequency of heterozygotes if the population is in Hardy–Weinberg equilibrium? Show your work. Thanks for any help in advance!
  73. biology

    a field mouse eats 10000 g of leaves each year, among other things. If each gram of leaves has absorbed 150kj of energy from the sun, about how much energy is available for the mouse ?
  74. biology

    A scientist wishes to determine how effective a vaccine is in protecting rats against a contagious disease. What experimental procedure should the scientist use to determine the vaccine's effectiveness?
  75. biology

    Which one of these occurs durning the light reactions of photosynthesis? a. carbon dioxide fixation b. g3P production c. NADPH production d. reduction in carbon dioxide
  76. Biology

    Describe the G protein receptor system and the tyrosine-kinase receptor system. Explain how these two systems are similar and how these two systems are different, in terms of structure and function please.
  77. Biology

    How do you find chi squared? and how do you find the expected values for chi squared? I understand the formula but i conducted the experiment and it doesnt give me the theoretical value of it?
  78. BIOLOGY

    Predict which would diffuse faster, briefly explain why. a. Methylene blue or KMnO4 with the same concentration b. 1.0M vs 0.1 M methylene blue solution c. KMnO4 at 0oC and 100oC
  79. biology

    Which of the following statements about the image show below is not an observation? (The object is a the bug) a. The insect has 3 legs on the left side. B. The insect has a pattern on its back. C. Then insects pattern shows that it is poisonous. D. The
  80. Biology

    Hi can someone please help me with this? What are the major advantages and disadvantages of an arthropod's exoskeleton? For the advantages I have provides framework for support, protects soft body tissue and slows water loss in animals that live on land.
  81. Biology

    Human vision can distinguish objects down to about a 4th of a millimeter (~250 micrometers). Given this, which of the following are generally visible to the human eye? Proteins Bacterial cell Animal cell Poxvirus Ribosomes Plant cell None of the above I
  82. Biology

    Will O2 passively diffuse and bind with hemoglobin that is less than 1mm from the surface of a blood sample? The percent of hemoglobin bound with O2 is different at high (10% CO2) and low (5% CO2) CO2 concentrations when the Po2 equals 0mmHg. Is that true?
  83. biology

    Will O2 passively diffuse and bind with hemoglobin that is less than 1mm from the surface of a blood sample? The percent of hemoglobin bound with O2 is different at high (10% CO2) and low (5% CO2) CO2 concentrations when the Po2 equals 0mmHg. Is that true?
  84. biology

    Question: What are the distinguishing characteristics of prokaryotes? My Answer: Prokaryotes range in size from 1 to 5 micrometers, making them much smaller than most eukaryoteic cells. Prokaryotes can be divided into two very different groups Eubacteria
  85. Biology & Math

    Using the following data calculate the number of neutrophils per ml. Total WBC count: 6.3 x 10^6/ml Total cells counted: 157 Neutrophils counted: 53 If possible could you show how to work it out to, thanks :)
  86. Biology

    Can someone help me. I need to know for nervous tissue, it's defined by ??? I have a worksheet and have gone through all the other ones, but my book or a web site hasn't helped me with finding the nervous tissue. I know the 2 kinds, neurons and glia, but
  87. Biology

    Hello and good evening Are there groups of arthropods ? Lots of groups of arthropods. Check out this site. http://www.ucmp.berkeley.edu/arthropoda/arthropoda.html
  88. Biology

    Heterozygous tall and red flowered pea plants were selfed and total 2000 seeds are collected. What is the total number of seeds for both heterozygous traits?
  89. biology

    How does carbon dioxide emissions from factories, cars and trucks effect global warming? How does methane released from landfills and agriculture effect global warming?
  90. Biology

    Which is NOT a major function of proteins? A. Provides cell structure B. Stores energy for the cell C. Functions as regulator molecules in cellular activity D. Functions as carrier molecules is it D
  91. biology

    need a list describing at least five similarities and three differences between plant and animal cells. In addition i need five internal structures of plant or animal cells and describe their functions in my own words.
  92. biology (check answer)

    What is different about every nucleotide of a DNA molecule? a) the deoxyribose sugar b) the phosphate group c) the shape of the molecule d) the nitrogen bases it's the nitrogen bases, am i correct?
  93. biology

    A human cell has 10 ^14 cells and each cell has about 6.4 x 10 ^9 nucleotide pairs of DNA. What is the length, in cm, of double helix that can be formed from the total amount of DNA in a human individual?
  94. Human & Social Biology

    (1)Briefly discribe five main ways in which human pollute their. (2)Briefly outline four inportant social problems maybe reduce by a knowledge of biologist.
  95. Representing Human Traits

    I'm confused on when to use a two capital letters, two lowercase letters or one of each. This is for traits. We just started it in Biology. It has something to do with heterozygous and homozygous dominant and homozygous recessive and so on. For example Pp
  96. biology

    Hello, I have a question. For one molecule of glucose are there six CO2 molecules released during cellular respiration? I'm looking at the kreb/ citric acid diagram and I'm not sure if it is four or six CO2 molecules being released. I'll appreciate your
  97. Eng, Bengali, maths, science, social science

    A rectangular swimming pool measures 15 meters by 10 meters. How wide must a concrete walk around the pool be if the walk is to cover an area of 116 square meters
  98. Biology

    Why is it important to understand the characteristic of life in a health care setting? Can someone please help me with this!!!??? I'm really confused and I'm not sure how answer this... Can you please just give me a few ideas to get started?? I'm thinking
  99. biology 2

    The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the
  100. biology 2

    The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the