science, biology

41,074 results, page 56
  1. Advance Biology

    Compare mitosis and meiosis by completeing the chart. Mitosis- Meiosis-homologous chromosomes pair and then separate Mitosis- Meiosis-needed for sexual reproduction
  2. 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
  3. Science

    I have some homework questions that i am having problems finding. Please help! 1. What is the value of math to science? 2. What is the value of using graphs to represent data? 3. How do units give numbers meaning and help verify correct formulas? 4. Why
  4. Biology

    I know that miller syndrome is autosomal recessive so would i use a karyotype or pedegree to represent that because I have to: Include a pedegree of at least 3 generations to demonstrate the inheritance pattern. Be sure to label and explain the chart
  5. science

    I need help on science project ideas ,please give ideas on what I can do. The answer to this depends on how much time you have, your interests, and your background. I have always been rather favorable to testing the school and home drinking water for lead,
  6. Biology

    Eutrophication refers to 1. the concentration of a toxic substance in the tissues of organisms. 2. depletion of mineral resources as a result of leaching. 3. the warming of the earth’s surface. 4. the damage to the ozone layer that protects the earth
  7. Binomial Distribution

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

    Which parts of Lamarck's theory of evolution are no longer supported today? Choose two of the following. - Organisms change over time - Traits acquired during an organism's lifetime can be passed down to its offspring - War, famine, and disease help keep
  9. Science-help needed

    A letter R on a piece of paper is observed under a microscope. The image observed is vertically inverted and laterally inverted. Why? What is the science definition of laterally inverted? Thanks a lot.
  10. biology

    The plasma membrane: Tick the box next to the ONE answer you believe is TRUE. A. can generate action potentials in excitable cells B. may burst in hypertonic extracellular solution C. can contain carbohydrates which confer ion permeability. D. is made up
  11. 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.
  12. math

    I just do not understand how to figure this out. Find the number of subsets of the given set. {math, English, history, science, art} Would I do something like this: 1. {} 2. Math 3. English 4. history 5. science 6. art 7. Math and English 8. math and
  13. 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
  14. 9th Grade Biology

    Assume that the fish have an average mass of 280g. The average caloric value is 8kcal/g. The heron is able to digest 60% of the fishes’ mass. How many will it need to eat to sustain its caloric intake of 3,000kcal/day?
  15. Biology

    Which one of the following organelles would be especially abundant in the pancreatic cells that produce digestive enzymes? A. rough endoplasmic reticulum B. smooth endoplasmic reticulum C. lysosomes D. microfilaments E. mitochondria Apparently the answer
  16. biology

    Need help with FOV area (mm2) totally confused? im confused i have the FOV diameter they are: 4x = 5 10x = 2 40x = 0.5 a classmate told me she thinks the area for 40 x is: pi(5/2)^2 = 19.6 not sure if that's true or how to do it for the low and medium,
  17. Biology

    Why would the GBI (Georgia Bureau of Investigation) want to use gel electrophoresis? A. Determine if someone has a genetic disease B. Determine the paternity of a child C. Determine the proper genetic sequence to make insulin D. Determine the identity of a
  18. biology-genes

    1)what process must occur between the F1 parents and the F1 gametes? 2)What process occurs between the gametes to poduce the F1 or F2 stage? 1) 2)
  19. Biology

    In anaphase of mitosis, the sister chromatids are separated and pulled to the poles. How do these chromatids, which are only half of a duplicated chromosome, become chromosomes? As I understand it, mitosis produces daughter cells that are identical to the
  20. biology

    Name at least 3 useful purposes for bacterial endospores. -I have only 2, which are: produce antibiotics and produce toxins that kill insects. Also, how is the spore location within the cell used to differentiate species? -All I could find is that the

    Describe the processes of transcription and translation and correctly identify the anticodon for the following DNA template strand-ACG TGG GCA TGA ACG TGG. Which amino acids do these anticodon represent?
  22. Biology

    The water cycle is best described by which of the following statements? Water in the atmosphere must be converted to another chemical before animals can use it. The water on earth changes forms as it moves from one reservoir to another.>----- My answer
  23. Biology 11 U

    In the U.S. 1 out of 10 000 babies is born with phenylketonuria (PKU). The disease is caused by a recessive allele. The frequency of individuals in the U.S. population born with PKU corresponds to q squared. What is the given information? (e.g. p squared =

    Human tissue cells seem to fit together like pieces of a jigsaw puzzle. How is this arrangement of cells helpful to an organism? The presence of membranes around organelles indicates increasing complexity. Why do you think the presence of such membranes
  25. Biology of environment

    I have to define what these words mean culture and environmental ethics and which one have influence over other For culture I just wrote that its beliefs and customs that are shared of group of people anything to add to that and I don't get what
  26. biology

    Name at least 3 useful purposes for bacterial endospores. -I have only 2, which are: produce antibiotics and produce toxins that kill insects. Also, how is the spore location within the cell used to differentiate species? -All I could find is that the
  27. Psychology/Biology Help!!

    1) What memory system is sensation responsible for? Sensory, short term or long term memory system? Explain. 2) How does encoding memories relate to transfer appropriate processing and fluid intelligence?
  28. biology

    Which process occurs in fungi and has the opposite effect on a cell's chromosome number than does meiosis I? karyogamy mitosis plasmogamy crossing-over binary fission I know that it is not mitosis. And I don't think that it is crossing-over. I was thinking
  29. Biology

    In humans, W=widows peak while w=normal hair line and A=attached earlobes while a= unattached earlobes. A heterozygote in both traits reproduces with a similar heterozygote in both traits. What is the chance of any one child having the same genotype of the
  30. Biology

    The base sequence of the gene coding for a short polypeptide is CTACGCTAGGCATTAGACTGGTA. What would be the base sequence of the mRNA transcribed from this gene?
  31. Biology

    What does b-mercaptoethanol do to secretory proteins?also...If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?
  32. 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?
  33. biology

    escribe the biochemical process of biological fixation of nitrogen. write the general equation of biological nitrogen fixation.
  34. Biology

    What does b-mercaptoethanol do to secretory proteins?If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?
  35. Biology

    I am a bit confused about conjugation, transduction and transformation. I understand the basics but how do they work? More confused with transduction and transformation. Thanks for any help in advance!
  36. Biology

    What does b-mercaptoethanol do to secretory proteins?also...If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?
  37. Biology

    Can someone please help me find a website? I am doing a project on Maple Syrup Urine Disease and need to find a website that says when the disease was first discovered or how long we have known about it.
  38. Biology

    What does b-mercaptoethanol do to secretory proteins?If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?
  39. biology

    Someone has just given you the cDNA for GFP and you would like to design a construct that would result in GFP becoming resident within the ER. What would you do to this cDNA that would result in this final location. Explain.
  40. Biology

    Write a brief description of the procedure required to make 10mL each of 2 M, 1.5 M, and 1 M NaCl solution from a 2 M Stock NaCl. Write the description.
  41. Biology

    What Is The Primary Focus Of All Biological Studies? Answer Now Please The primary focus is to understand life and life processes. i don't know
  42. Biology

    Which of the following statements about enzymes is not true? A) Enzymes work best at a specified pH B) All enzymes have the same shape as their substrates. C) Enzymes are proteins. D) The shape of an enzyme allows it to do its job.
  43. biology

    snail in the low oxygen environment what aspects of the new environment will be salient snail and how will aspects act as selective forces

  45. biology

    substrate concentration and pH affect enzyme activity. Is there another environmental condition you think could affect enzyme activity How would you test your hypothesis?
  46. Biology

    How do you balance equations? The reactants are written on the left and the products on the right.An arrow pointing towards the product is inserted between the reactant and product.The number of
  47. Biology

    "Suggest two things a large cell might do to increase its surface area:volume ratio". The obvious method would be to divide into many smaller cells...but what else can the cell do? I also thought that it could just simply grow larger, but the question
  48. biology

    an experiment, a scientist notices that an enzyme’s catalytic rate decreases when the pH of the environment is changed. Which of the following best summarizes the effect of pH on the enzyme? A. pH changes the shape of the enzyme. B. pH takes energy away
  49. Uh Biology :)

    Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning enzymes in these organisms. Suggest ways ectothermic organisms might cope with this problem.
  50. 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
  51. biology

    1. Owls sleep during the day and are awake at night because of their kind of estivation habituation* circadian rhythm conditioning 2. When a bird sings to signal others of the same species to keep away, it is showing signs of cheerfulness courtship

    The 1918 Influenza Epidemic was the worse one on record. People infected early in the epidemic had a mild flu, while those later infected had a much more severe form of the disease. What is the explanation for this observation and what laboratory studies
  53. Biology

    Among protostomes, which morphological trait has shown the most variation? A. Type of symmetry (bilateral vs. radial vs. none) B. Type of body cavity (coelom vs. Pseudocoelom vs. acoelom) C. Number of embryonic tissue types (diploblastic vs. triploblastic)
  54. Biology

    Should the point (0,0) be plotted on this graph? Average Temperatures in Degrees F. (1)Jan 52 (2)Feb 57 (3)Mar 65 (4)Apr 73 (5)May 80 (6)June 87 (7)July 89 (8)Aug 88 (9)Sept 82 (10)Oct 73 (11)Nov 63 (12)Dec 55 This data represents a repeating cycle. Should
  55. biology

    Question 18 If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms? Answer Release of interleukin-10 Recruitment of B cells Release of
  56. Biology

    What does your body need oxygen for A. It is necessary to aerate the brain C. Cells need it to produce the energy they need to function D. Air flow aids in blood flow within the blood vessels E. It produces hemoglobin, needed to carry carbon dioxide My
  57. Biology

    A trait whose expression is affected by the presence of sex hormones is said to be a. sex-influenced b. sex-linked c. X-linked d. Y-linked I read the section multiple tmes, and the book doesn't really specify. Thanks in advance if you could answer it!
  58. Biology

    In DNA extraction of plants, which plants would work well for extraction and why?
  59. Biology

    Which larger a chromosome or a nucleotide. Which is larger, a chromosome or a nucleus?
  60. biology

    how do some cells become brain cells and others become skin cells when the DNA in all of the cells is exactly the same
  61. Biology: Genetics

    18.Which of these is trueof meiosis? A. n → 2n B. n → n C. 2n → n D. 2n → 2n Is it C.?
  62. Biology

    what kingdom does opalina belong to? and... what kingdom does rockweed belong to?
  63. Biology

    Are chlorplasts necessary for the reduction of DCPIP? why or why not? and is light necessary for the reduction of DCPIP? why or why not? I
  64. Biology

    What does it mean to say that two genes are "linked"? Can linked genes assort independently? Why or why not?
  65. Biology

    What causes acid precipitation, and what are the negative effects of acid precipitation?
  66. biology

    the differences between a living thing and non living thing (essay)
  67. biology

    if you have 1.0*10^9 molecule in tube and perform a 10^-7 dilution, how many molecule will in the new tube?
  68. Biology

    Two parents are blond haired and their children are blond haired. Why is this so?
  69. Biology

    You need to prepare a 0.25 M solution of NaCl but you only need 50 ml of this solution. How many grams of NaCl would you need?
  70. Biology (immune system)

    How does the immune system help maintain homeostasis? Help me please :(
  71. Biology

    Unikonta paraphyletic or monophyletic? Animalia paraphyletic or monophyletic?
  72. biology

    what can we use to measure exactly 0.55ml of water. and what can we use to measure exactly 85ml of water.
  73. Biology

    What kind of animals have eggs that contain yolk? Do all eggs have yolk?
  74. Biology

    Is a enzyme a protein or is a protein an enzyme? Explain. I have no idea please help me thank you
  75. biology

    C6H12O6=180 gm to make 1M how much H2O will you need? to make a o.1M how much H2O will you need?
  76. Biology

    One of the differences between Cambrian animals and pre-Cambrian animals was the appearance of ___________ such as antennae as Cambrian animals evolved. Can somebody help me I literally have no clue.
  77. biology

    What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface
  78. Biology

    Describe interdependence in a viological community (Broken Link Removed) (Broken Link Removed) why is milk pasteurised or UHT treated?
  79. Advanced Biology

    At the end of the Cambrian Period, fossil evidence indicated that: A.) a great adaptive radiation of amphibians occured B.) amphibian species reached their greatest number C.) most amphibian species became extinct d.) amphibians first appeared
  80. Biology

    Researchers working on Alzheimers disease identify a gene which may help treat the condition., but use a shortened version of the gene ..which codes for all necessary amino acids .. can anyone explain how the shortened version may be obtained .. If any

    Botulism (a toxin produced by bacteria that causes food poisoning) and curare (a natural poison) inhibit the action of acetylcholine. What symptoms would you expect to find in someone exposed to botulism or curare? Provide an explanation for the symptoms.
  82. Biology

    Distinguish between breathing and respiration , i wrote: Breathing is the process of taking in oxygen and eliminating carbon dioxide. Respiration is the breakdown of oxygen in the body- although both are needed for all living organisms Is this true? If not
  83. Biology II AP

    Compared the process of mitosis with the process of meiosis and include answer with study of the change in chromosome number. Where do these changes occur and how are they relevant to the processes discussed? I understand the comparing part, but then the
  84. biology

    Can someone please explain to me the difference between gram-positive & gram-negative bacteria. What are they, what do they do? EXPLAIN I know that you can tell them apart by the method called gram staining. The gram consists of two dyes one violet which
  85. biology

    If you have a gene pathway with three activities, say A, B and C, and you have a mutant where an area of the pathway is affected, what kind of experiment would allow you to distinguish if A, B or C is affected? Does it make sense to plate the mutant
  86. Biology - Diversity

    A scenario where bacteria will undergo sexually reproduction instead of taking the "safe route" and reproducing asexually. I know that they reproduce sexually when conditions are not favorable and will enter a dorment stage until conditions get better but
  87. biology

    A 28.0-g sample of ice at -18.0°C is mixed with 124.0 g of water at 85.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and
  88. Biology question pH

    pH levels are each a 10-fold change so a change by 2 is actually a change by 1000. pH determines certain characteristics in organisms that allow them to live in certain areas so an alteration in pH changes their adaption skills. why is a change by 2 =
  89. science,technology and the environment

    describe,compare and contrast induction and deduction as methods of science.using examples where appropriate.Identify and solve a problem using both induction and deduction.where appropriate illustrate why and how one would use experimentation and cycle of
  90. Science/Standardized test

    How can I prepare for the science portion of a standardized test? There seem to be alot of practice question on anatomy and I never took that course. Are practice questions always similar to the real test?
  91. Childhood Education

    Learning to make candy from a recipe would relate most directly to which two of the 13 activity areas? A Math and science B Social studies and science C Cooking and math D Social studies and cooking . I belive the C is the correct answer
  92. Science - Sally Ride - Contributions

    What did Sally Ride contribute to the advancement of science?
  93. Science

    Is there any website or any way I can get the science probe 10 check your understanding answers cause I want to check my answers?
  94. Biology

    Compare the functions of a normal cell and that of a cancer cell with regards to cell division. Discuss the cell cycle control system and checkpoints and how these might be altered in a cancer cell.
  95. 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
  96. biology

    Minerals ener the plant through the soil solution. SOme are passively carried along with the ater that is taken up. Plants can also selectively absorb minerals and accumulate them. This requires active transport across a cell membrane. If it were not for
  97. 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
  98. Science ...Urgent plz

    Describe, compare and contrast INDUCTION and DEDUCTION as methods of science – using examples where appropriate. Identity and solve a problem using both induction and deduction. Where appropriate illustrated why and how one would use experimentation/
  99. Biology

    If agglutination occurs when blood with a certain antigen and blood with the corresponding antibody mix, why is blood type O the universal donor? Wouldn't the A or B antibodies from the O type blood attack the blood antigens of the recipient and cause
  100. biology

    What is the correct definition of a princible? a)A statement of a relationship between two or more abstractions. b)A simplified, symbolic representation of a theory or conceptual scheme. c)An abstract generalization that presents a systematic explanation