science, biology

40,893 results, page 71

  1. Biology

    I'm having trouble answering this: The average size of a large fish that humans use for food has been decreasing over time, Exp-lain how, exactly, this happens - be sure to discuss genes, proteins, traits, and selection pressure. This is all I can answer :( The large fish are ...
  2. Civics

    In the case The Senate Of Tennessee V. John Thomas Scopes, high school biology teacher John Scopes was accused of teaching content that violated a Tennessee law that stopped public school teachers from teaching evolution. Scopes voted this law , but felt his right to free ...
  3. science

    can some explain to me how birth, death and migration rates affect the population? I have read but really do not understand it? the factors that can affect these rates i am assuming is urbanization cost of raising and educating children educational and employment opportunities...
  4. Physical Science

    1. Which equation correctly shows beta decay? (A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y (B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y (C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y (D) 210/82 Pb -> 210/83 Bi + y (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y 2. The half-life if radon...
  5. Biology

    In 1665, Robert Hooke, an English scientist, reported an interesting observation while looking through his microscope at a cork, "I took a good clear piece of cork, and with a penknife sharpened as keen as a razor, I cut a piece of it off, then examining it with a microscope, ...
  6. BIOLOGY( please help me)

    Oxidized (blue) DPIP becomes colorless when it is reduced – that is, when it receives electrons. A diagram of the photosynthetic light reaction shows that water molecules are the source of these electrons. How is it that the DPIP was only able to receive reducing electrons ...
  7. biology

    What are coupled reactions? Describe the interactions between enzyme, substrate, active site and the induced fit model Explain how changes in temperature, and pH affect the function of enzymes Recognize the structure of ATP, and be able to identify some key functions of ATP. ...
  8. biology

    What chemical fuel powers all cell activities? Since this is not my area of expertise, I searched Google under the key words "cell metabolism chemical" to get these possible sources: http://www.answers.com/topic/cell-metabolism I hope this helps. Thanks for asking.
  9. Biology

    Consider the following events: 1) The protein has sugar added to become a glycoprotein. 2) The protein is in the plasma membrane with the sugar modification facing outside the cell. 3) A membrane protein is synthesized in the rough endoplasmic reticulum. 4) The glycoprotein is...
  10. biology help please

    Compare the pig brain to drawings of a human brain, a fish brain, and a bird brain. Can you see how the pig’s anatomy parallels human anatomy? What can you conclude about our relation to animals like pigs? Like birds? Like fish? I have not been able to find anything on birds...
  11. Biology

    For any given age and body surface area, men have a greater MVV than women. Give one anatomic or physiologic reason why. Is it because men tend to be more stronger and athletic than women, thus allowing respiratory muscles to be stronger Men are larger than women, thus more ...
  12. biology

    Given below is the sequence of the mRNA ready for Translation" 5' - AUG CUA UAC CUC CUU UAU CUG UGA - 3' a) what is the first codon technically known as and which amino acid does it code for? b) how many amino acid residues will make the polypeptide chain corresponding to this...
  13. Biology/Chemistry

    During a “perm”, disulfide bonds can be broken and reformed using which treatments, respectively? I think the answer is a. but can someone confirm this? a. an oxidizing agent followed by a reducing agent b. a reducing agent followed by the use of water c. an oxidizing ...
  14. biology

    If a person with Down syndrome marries a person without Down syndrome, is it possible for their child not to have Down syndrome? I assume that there is a 50% chance that they could have a child that will not have down syndrome. Is this correct?
  15. Biology

    What would happen if your liver stopped producing sufficient quantities of bile salts? A. You would develop gallstones B.Your small intestine would have trouble breaking up fat globules. C. Your small intestine would have trouble neutralizing acid from your stomach. D. You ...
  16. molecular biology

    How did O'Donnell show that the sliding clamp complex actually slides along dsDNA providing processivity to DNA Pol III? I think he took dna, a primer, and one radioactive dNTPs, added Pol III that was isolated, ran a gel, and the conclusion was that it was processive because ...
  17. Biology

    Which is one way that a freshwater wetland differs from a lake or pond? A. water flows in a lake or pond but never flows in a wetland. B. Wetlands are nesting areas for birds, but lakes and ponds are not. C. Water does not always cover a wetland as it does a lake or pond. D. ...
  18. history..maths litercy..geography..life science..isizulu..life orentation..

    im doing grade 11 and next year im doing grade12 so my question is that i want to be a boilermaker and i want to work in sasol so i don't know if this sbject is right to do boilermaker if you have any information please contact me on 0736124260 or 0739615308 in june exam my ...
  19. Biology

    How do you balance equations? http://www.chemistry.ohio-state.edu/betha/nealChemBal/ 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 molecules have to be the ...
  20. college biology

    Consider the following events: 1) The protein has sugar added to become a glycoprotein. 2) The protein is in the plasma membrane with the sugar modification facing outside the cell. 3) A membrane protein is synthesized in the rough endoplasmic reticulum. 4) The glycoprotein is...
  21. Biology

    What is a molecular clock? A)a tool scientists use to date fossils B)a tool scientists use to determine how many mutations a species accumulates over time C)a tool scientists use to determine how long two species have been evolving independently D)a tool scientists use to ...
  22. biology

    an investigation was done to determine the role of petals in insect pollination in apple flowers.when flowers are self pollinated,the tubes grow a little into the stigma and style and fertilization does not take place.(1)10 flowers with petals and 10 flowers without petals ...
  23. Biology

    Why do elderly people experience cold intolerance when they in fact have increased adipose tissue and more lipid storing area? I mean I know temperatures of the body is regulated by the hypothalamus along with the thyroid and all .. but what i always thought a person with more...
  24. English

    Here is the second part of the school description I need to translate. Some words are unclear and the sentences are too wordy. I need your help to improve them. 1) third branch includes the study of two foreign languages: English and French and addresses to all those who wish ...
  25. Biology

    Recent studies of children and juveniles of other species show that when their eyeballs are actively growing, frequent exposure to blurred images can permanently alter the shape of the eyeball. The blurring results when objects in the field of view are at various distances and...
  26. Biology-Is my answer correct

    Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right? A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis of the ...
  27. ap biology

    i need help with this quewstion but i cannot post the graph i some one could help if you would like to give me your email and i will send it there. it would be great please i really need help * how do (1) temperature and (2) pH affect the activity of this enzyme? include a ...
  28. 12th grade Biology

    Consider the following animals: Earthworm Flatworm. Frog. Jellyfish. Lamprey. Tuna. Create a table of fundamental traits for these six animals as a basis for building a cladogram. Use traits that are either present or absent in a given organism. Use the jellyfish as an ...
  29. Biology

    10. 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 wastes c. secretion of bile, digestion of food, and reabsorption of...
  30. Biology Help!!!

    Describe the relationship between ATP and ADP and the importance of this relationship within a cell. My answer: ATP stands for Adenosine Tri-Phosphate, and is the energy used by an organism in its daily operations. It consists of an adenosine molecule and three inorganic ...
  31. Biology

    1.,you drink salty beverages (clams to) and eat pretzels all day. At the end of the day your weight is way up. Why? I think it has something to do with the fact that our cells shrink in size ? I have no clue? 2. Athletes drink Gatorade . Why? Given the description, tell the ...
  32. psy - please revised

    what are some of the ways that psychologists attempt to explain human behavior? One of the major debates within the field of Psychology is the degree to wich nature versus nurture shapes human behaviors and traits. What comprises our nature? How would you define nurture? How ...
  33. Biology

    A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong. Are the following true or false and support your answer: i. Red blood cells and nerve cells in adult humans are suitable for karyotyping (...
  34. biology

    3. A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylinder and the resulting pressure of the air inside the cylinder is measured with a pressure gauge. The results of the experiment are recorded in the following ...
  35. Science

    I did A Lab in science where I had a Small hotwheels car and started and 6 books and made a ramp. I then timed how long it took the car to go 2 meters from the ramp. after each trial I added one more book to make the slope higher. The car stayed the same and the higher the ...
  36. Biology

    We are learning about proteins and their structure, but one thing is confusing me. At what structural point is something considered a protein? Is a protein formed after two amino acids synthesis, or is a protein the whole structure (all four levels) put together? I would think...
  37. Biology

    During translation, the amino acid detaches from the transfer RNA molecule and attaches to the end of a growing protein chain when a. the ribosomal RNA anticodon binds to the messenger RNA codon. b. the transfer RNA anticodon binds to the messenger RNA codon. c. a "stop" codon...
  38. Ap Biology

    In the case of water, solid water is less dense then liquid water. What is happening at the molecular level? a. Molecules move faster in ice than water. b. Hydrogen bonds break more easily in ice. c. Hydrogen bonds break more easily in water. d. Molecules are stationary in ice...
  39. Biology (alert!)

    Which sentence do you think does not agree with the true facts of coral reefs? 1. Off shore coral reefs are the cause of terrible storms in coastal communities. 2. Coral reefs form when the shells of thousands of corals join. 3. Sponges gives out chemicals that harden around ...
  40. Biology

    Janet's boss calls her into the office to discuss why see failed to complete her project for the big meeting this afternoon. Janet's sympathic nervous system: A) makes her thoughts race for an excuse B) Makes her start to perspire C) Enables her to walk in upright D) slows ...
  41. Biology

    As a nurse in a hospital, your observe that certain kinds of pain may be allievated by mere offering of a drug, potent or not. To test this hypothesis, two pain drugs and placebo randomly adminstered to patients following surgery. Time is recorded in hours until patient ...
  42. science

    how did ice get its name?
  43. science

    what is a sample of a gas
  44. science

    what are the 5 branches of physics?
  45. science

    what are the subunits of starch
  46. science

    what are the parts of the cells
  47. science

    what is cell made up of?
  48. science

    what is 7 blue, 3 times???
  49. Science

    What do you mean by Resource
  50. science

    whats correct 1 L = dm^3 or 1 L = cm^3 ?
  51. science

    62m in centimeter
  52. Science

    What are examples of insolubles?
  53. SCIENCE

    WHAT IS A SIMPLE PLANT?
  54. Science

    What is waste management?
  55. Science

    What are societal laws?
  56. Science

    what does deposition mean?
  57. science

    what is the opposite of a stalactite
  58. Science

    If the mass is 5 kg, what is the weight???
  59. SCIENCE

    HOW MANY SATELLITE ARE THERE IN SPACE AND WHAT ARE THEY FOR
  60. science

    who invinted the v2 rocket
  61. Science

    What do waves transfer?
  62. Science

    How do balance an equation?
  63. Science

    I want to know why the rain is cold.
  64. science

    Where does calcite come from?
  65. science

    what is a changed variable?
  66. Science

    Where is Feldspar found?
  67. science

    what is the size of a x-rays?
  68. science

    how do plants reproduce?
  69. science

    were can i go to get information on leopards
  70. Science

    What does chromatin do in a cell
  71. science

    what is cellular respiration
  72. science

    what is biosphere 2? what do they research there?
  73. science

    How do you measure velocity???????
  74. science

    what are 2 types of weathering?
  75. science

    what is a chemical change?
  76. science

    How can I convert 50 kg to pounds?
  77. science

    What is the cell theory
  78. science

    how are faults classfied
  79. Science

    Where is lantana located?
  80. science

    explain an abstract
  81. Science

    Help! What is s reflected ray
  82. physical science

    1000000 uL = ?L
  83. Science

    Why do we name rivers?
  84. Science

    What Do Peaple Invent?
  85. Science

    why is the moon important?
  86. Science

    why is the moon important?
  87. science

    what are food webs?
  88. science

    where is the nucleus located?
  89. science

    what is a data table
  90. science

    what is (aenosss) unscrambled
  91. science

    what are 3 types of symbiosis
  92. science

    how d scientst contribute?
  93. science

    how do scientist contribute?
  94. science

    What is the formula for velocity??
  95. science

    what are electric charges?
  96. science

    evidnce for evolution
  97. science

    what is the defenition of dissolve?
  98. science

    how tall is a mole
  99. science

    who is the primminster of Canada
  100. Science

    What is the definition of expansion?
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