science, biology

41,328 results, page 61
  1. biology

    explain what is the carbon cycle and why its called a cycle *explain four "moves" that occur in this cycle * explain the importance of this cycle to organisms *explain the human impact and effects on this cycle when fossil fuels are burnt
  2. biology

    explain what is the carbon cycle and why its called a cycle *explain four "moves" that occur in this cycle * explain the importance of this cycle to organisms *explain the human impact and effects on this cycle when fossil fuels are burnt
  3. algebra

    An “A” is considered 4.0, a “B” is 3.0, a “C” is 2.0, a “D” is 1.0, and an “F” is 0. In your first semester you received the following grades. Calculate your grade point average English = credits 3.0 Grade = C Biology = credits 4.0
  4. human biology

    I hope someone can help me answer this queestion: which of the following does NOT involve the sharing of electrons? H20, HCl, NaCl, H2 or C6, H12, O6 and why? The last three compounds you listed do not exist. Among the others, NaCl does not share
  5. Biology

    Why was Charles Darwin able to offer a large amount of evidence for his theory of evolution by natural selection? He compiled the fossil record. He collected data for 5 years while traveling around the world. He conducted in-depth experiments with
  6. language arts/earth science

    hey people.. I'm preparing a speech for my language arts and earth science class (the speech is persuasive, about "why should we use geothermal energy"). so I was looking for some methods how to start my speech (introduction), how to end it, body language
  7. Science

    this my science homework about milo so yeah if you can answer these would be great. What is the solute? What is the solvent? Was the mixture a solution or a suspension explains why? Which part of the mixture is the sediment? Explain why the particles
  8. biology

    Which of the following are three common characteristics of echinoderms? a. tube feet, circulatory system, body symmetry b. marine-dwellers, endoskeletons, water-vascular system c. bilateral symmetry, ossicles, respiratory system d. mouths, protosomes, body
  9. Biology 20

    Name 3 substances that the liver stores: 1) glycogen. When there is lots of sugar in the blood, the liver converts it into glycogen which is used for storage. Glycogen formed us determined by insulin which is released from pancreas. I'm not sure of what
  10. science fair ideas

    What are some really good/cool science fair ideas?
  11. biology need help

    1 – 2 sentences why each of the following unique properties of water is important to living things Water is the universal solvent: Water is less dense as a solid than as a liquid Water molecules are attracted to one another (cohesion) Water molecules are
  12. biology

    1 – 2 sentences why each of the following unique properties of water is important to living things Water is the universal solvent: Water is less dense as a solid than as a liquid Water molecules are attracted to one another (cohesion) Water molecules are
  13. biology

    Can someone explain how the DNA vaccine differ from a traditional vaccine? Since this is not my area of expertise, I searched Google under the key words "DNA vaccine" to get these possible sources:
  14. Biology

    You have a flask with 100ml of fresh media. You place 200 bacteria int he flask. Assume that the bacterai were previously growing in the same kind of media and so the lag is 0. If you knew that this species of bacteria has a doubling time of 45 min in
  15. Biology

    A spermatogonial cell undergoes mitosis before entering the meiotic cell cylce en route to the production of sperm. However during mitosis the cytoplasm fails to divide and only one daughter cell is produced. A resultant sperm eventually fertilizes a
  16. Biology

    During skeletal muscle contraction: Choose one answer. A. the A and I bands do not change length. B. cross bridges are formed between myosin and actin. C. minimal tension can be generated when the muscle is close to its normal resting length. D. the
  17. math

    The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 32 said they had taken physics, 51 said they had taken chemistry and 15 said they had taken both. Ten said they had
  18. Biology

    If a curly haired father and straight haired mother 8 children are born .the ratio of curly and straight haired will be ......
  19. Biology

    To a curly haired mother and straight haired father 8 children are born. The ratio of curly and straight haired will be 1) 6:2 2) 4:4 3) 2:6 4) 3:5
  20. biology

    what statement describes the 1st step of ecological community it is known as? A. reed plants attract dragonflies and mayflies. B. frogs and snakes arive after emergent plants are established. C.climax trees such as ash and beech appear and eventually
  21. biology

    is heat capacity the same as specific heat capacity?
  22. Biology

    Why do eukaryotic cells develop, or how do eukaryotic develop?
  23. Biology-Respiratory System

    What can you do to keep your respiratory System functioning well?? Thanks
  24. biology

    Are all mixtures solutions? Are all solutions mixtures? Give an example.
  25. biology

    30. Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the importance of temperature-regulating
  26. Biology

    Blockage of the common bile duct would be expected to affect lipid digestion. protein digestion. carbohydrate digestion. nucleotide digestion. cellulose digestion. lipid is the only common sense one?
  27. 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?
  28. biology

    How is a cow protein different than a human protein? How is cow DNA physically different from human DNA? Remember all proteins are made up of amino acids
  29. Biology

    What could be a benefit for a plant that can switch between cyclic and non-cyclic electron transport? Think about the products of electron transport and what products are needed for the Calvin Cycle.
  30. 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?
  31. 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?
  32. 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).
  33. science

    what are the answers to the ecosystems packet for 7th grade in science? I need the answers asap because i need to finish getting all of the answers to the packet so i can study it tonight because i need to make up the test to that packet and it is because
  34. Biology

    Equal sized potatoes are dipped into water,weak sucrose and strong sucrose solution.Predict (a)What potato would increase in size (b)What potato would decrease in size (c)Comment on the stiffness of the potatoes before and after dipping them into the
  35. biology 101

    Produce a family tree for at least three generations of your family or a friend’s family following these genetic traits: Eye color Hair color Dominant hand Height Widow’s peak Hitchicker’s thumb A family genetic disorder Can't seem to start could you
  36. Biology 20

    Identify one biochemical that is of particular significance to your animal. Explain why it is significant to your assigned animal and describe it. This chemical could be an enzyme, a toxin, something used in scent marking, or any other biochemical agent
  37. biology

    Please help me answer these questions: 1. Advantage and disadvantage of cell division on the economy of animal? 2. In what part of plant is most likely to find mitosis? 3. Where to look to find mitosis in animal? 4. During what stage of the cell are the
  38. Biology

    What is the difference between necessary and essential nutrients? I don't think any difference. essential nutrients is the term used more frequently by health care professionals. Se the two sites below:
  39. biology

    Hi, I am doing a summary assignment on the Temperate Deciduous Forest Biome and i need help finding "Highlights of abiotic and biotic factors", Climate graph showing temperature and percipitaion, a food web and a map showing Canadian location of The
  40. Biology

    How is the eartworm's digestive system adapted for extracting relatively smal amounts of food from large amounts of ingested soil
  41. Biology

    Which of the following is true? A. In the human female, ovulation occurs in nine-month cycles. B. Egg cells develop in a structure called the uterus and are released at the rate of one a month. C. Spermatogenesis is the process of fertilization of the egg

    a student uses the unduiluted glucose stock solution in a reaction and finds that the absorbance values over 90 seceonds are all 1.900. What does this result tell you abou the enzyme activity of glucose oxidase in this reaction after the 90 seconds time
  43. biology

    Why did Nicholas Copernicus wait to publish his works on his deathbed? His work on the three laws of motion contradicted the Lutheran Church. His work on heliocentric theory went against Catholic doctrine and beliefs. His work included the dissection of
  44. Advanced Biology

    A recessive lethal gene in chickens causes circulatory failure and death of the embryo at 70 hours.A commercial hatchery finds that a hatching failure due to this gene of greater than 4% is unacceptable.What is the upper limit for the frequency of this
  45. Science, Nature Science,

    Give 3 examples of nutrients that WE NEED in our bodies that are soluble in water. Give 3 examples of gases that are soluble in water. Could you please help me these questions?
  46. Biology

    The scientist analyzes the insulin molecules, which are proteins, of three different species, A, B, and C. The insulin from A is different from B in six ways and from C in three ways. The insulin from B is different from C in two ways. Which two species
  47. 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
  48. Science

    it is now 8:59am but when the bell rings at 9:00am Suzete will be late for Science class. She must get from one side of school down three different hallways. She runs down the first a distance of 35.0 m at a speed of 3.50m/s. The second haallway is filled
  49. biology

    When genetically engineering an organism, a plasmid a. is the main chromosome of the bacteria that is cloned. b. is cut with a restriction enzyme to accept the gene of interest. c. helps screen for cells that did not take up the gene of interest. d.
  50. biology

    Genetic problem-monohybrid crosses with domimance. If a brown eyed woman marries a blue eyed man and they have ten children, all brown eyed, can you be certain that the woman is homozygous? If the eleventh child has brown eyes, will that prove what the
  51. biology

    Give the phenotype and genotype for the F2 generation of a person with Type a heterozygous blood and a type O blood type. Remember to use all possible parents. Using Punnett squares I got 50% type a blood and 50% type o blood is this right??
  52. math

    There are 30 books in a bookcase. The books in the case are either math, science ,or history books. Ten of the books are math books. There are 6 fewer science books than history books. How many science books are in the bookcase??????
  53. Biology

    Has anyone done this experiment before? I need help with the final results. What would happen when I place 2 mL of hydrogen peroxide into 5 test tube, add manganese dioxide powder to the first one, then add sand to the second one, liver to the third one,
  54. biology

    27. Pretend you are a carbon atom that was part of a molecule of CO2 dissolved in the water at the beginning of the experiment. Describe a path you could take through both organisms in this experiment, including the molecules you would be a part of and the
  55. Biology

    If a normal man marries a normal woman whose father was colourblind, what are the chances that their sons and daughters will be colourblind? Colourblindness is a sex-linked trait that affects males more often than females. With the aid of a Punnett square,
  56. biology test

    study guide last one purpose of 3 types of RNA My answer 1. rRNA - bonds proteins and mRNA to provide the site of protein synthesis 2. tRNA - is used to pair their anticodons with the matching condons on the mRNA strand 3. mRNA - is to be the transcript of
  57. 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?
  58. MATH

    The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 23 said they had taken physics, 47 said they had taken chemistry and 5 said they had taken both. Seven said they had
  59. English

    Which is the best way to write this sentence. Today the Pink Palace Museum has a science center too. 1.Today the Pink Palace Museum is having a science center too. 2.Today the Pink Palace Museum had a science center too. 3.Today the Pink Palace Museum will
  60. science

    A science student drops a rok down a mine shaft. It takes 3 sec. for the rock to hit the bottom of the shaft , at what speed of the rock just before impact? 32 feet per second per second is the acceleration rate of earth. At the end of second 1 the speed
  61. Math

    Jance spend from 7pm to 9pm doing her homework. She spend 3 times as mach time on her english project as she did on math. the science homework took twice as long as her math homework. How meny minutes did she spend on her science homework?
  62. Biology

    Proteins are manufactured from the "blueprints" found on DNA. After they are translated, they are moved through a system of internal membranes before being distributed throughout the rest of the cell. At some point in this process, they are modified to
  63. biology

    Stuck on this question. When infected by the Hepatitis B virus (HBV), many patients experience flu-like symptoms such as fever, loss of appetite, nausea, vomiting, and malaise. This is called acute hepatitis. During this stage, what is the HBV doing? What
  64. Biology!!!!!

    7)State whether the following sentences are true or false. Rewrite them if they are false. a) Every chemical reaction taking place in cells is regulated by a specific enzyme. b) Enzymes work inside cells only. c) Enzymes are carbohydates d) An active site
  65. Help: biology

    1. You have in front of you three vials containing a clear liquid. You are told that each vial contains one of the following carbohydrates: Fructose, Sucrose, Amylose. What experiments could you carry out to determine the composition of each vial. What
  66. Biology

    if the incidence of cystic fibrosis is 1 in 2500, what is the expected frequency of carriers for the CF allels? assume that this population is in Hardy-Weinberg equilibrium. I appreciate a hint to start this answering this problem. p^2 + 2pq + q^2 = 1 p +
  67. biology

    in addition to the above a labelled diagram is also required to show the product cells derived from this cell at the telophase 2 stage of meiosis.there is no crossng over.what differences would there be in the product cells at telophase 2 of meiosis if
  68. statistics

    An economist wants to estimate the mean income for the first year of work for college graduates who majored in biology. How many such incomes must be found if the economist wants to be 95% confident that the sample mean is within $500 of the true
  69. Biology - gylcolysis history (help+check)

    The process of glycolysis is thought to have emerged very early in the origins of life. What evidence to support this theory can you find in the material presented in this section? Be prepared to defend your ideas. Ans: is this question indirectly related
  70. Biology help :(

    Place the following process in the correct order. a) urine is stored in the bladder. b) blood enters the afferent arteriole. c) fluids pass from the glomerulus into Bowman's capsule. d) urine is excreted by the urethra. e) sodium ions, glucose and amino
  71. biology

    the unique properties of water make life possible on earth, select three properties of water and: a) for each propery, identify and define the property and explain it in terms of the physical/chemical nature of water b) for each property,describe one
  72. science

    Compare and contrast viruses and monerans? Since this is not my area of expertise, I searched Google under the key words "viruses monerans" to get these possible sources: (Broken Link Removed)
  73. Science

    lesson 9: energy and the environment unit test science 8 A Unit 4: Energy and the environment Please HELPPPPPP!!!!!!!
  74. Biology

    Which group in an experiment is not exposed to changes in the independent variable? (Points : 1) dependent group control group independent group responding group 9. The different parts of cells that have been broken apart can be separated by the process of
  75. Biology

    Which of the following helps explain why fungi are now classified in a separate kingdom from plants? A. The cells of fungi are not surrounded by cell walls B. Fungi are heterotrophs that cannot make food by photosynthesis C. The cells of fungi do not
  76. biology

    The brain stem is responsible for a. directing information in the brain and secreting hormones. b. regulating vital functions and memory. c. motor processing and regulating homeostatic functions. d. sensory processing and regulating balance. B?

    1. what are the differences between white blood cells and antibodies? 2.why is HIV not detected immediately as foreign material once it enters our blood stream or white blood cells? 3.what is the enzyme used by HIV to convert RNA to DNA?
  78. Biology!!!

    In humans, short fingers and widow's peak are dominant over long fingers and straight hairline. A heterozygote in both regards reproduces with a similar heterozygote in both regards reproduces with a similar heterozygote. What is the chance of any one
  79. Biology

    I have tried to look this up but can't find it... The basal metabolism rate can be measured by calculating the amounts of _______________ and ______________. (1 point) nitrogen and carbon dioxide nitrogen and oxygen oxygen and carbon dioxide - my guess
  80. biology 5

    which of the following is correct? A. mitosis results in 4 identical daughter cells B. meiosis is used for the production of gametes C. cells go through two series of divisions in mitosis D. daughter cells produced by meiosis contain the same number of
  81. biology

    A person carrying a heavy bag normally finds the impact of the weight differently if he carries it in different ways. For example if he carries it by the handle or by a strap on the shoulder or putting the whole bag on top of his shoulder. Why is this so
  82. Biology { PLEASE HELP :D }

    From an ATP production viewpoint, use fact B to make a statement regarding the efficiency of fats vs. carbs. Fact b - Carbs bind and store water. The metabolism of water yields no ATP. Fat has no water bound to it.
  83. Biology - GI Tract

    I have a question about Vit B12. Where is it absorbed in the body? In lecture, the professor stated once that it's absorbed in the small intestine and then later stated it was the large intestine. I'm thinking small intestine makes more sense but I'd like
  84. Biology-Ecology

    Multiple choice What is the ultimate source of energy for most ecosystems, and in what form does the energy leave the ecosystem? 1. plants; animals 2. light; heat 3. plants; heat 4. producers; consumers 5. heat; light
  85. biology

    need help If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand? Compare and contrast mitosis and meiosis as to: number of divisions, number of cells produced, number of chromosomes in parent cells and in gametes.
  86. biology

    If your ears were larger, you would: a. be able to hear sounds at lower amplitude (softer sounds) b. lose the ability to hear low amplitude high frequency sounds c. not experience any difference in your hearing ability d. none of the above
  87. biology

    If a brown-eyed man marries a blue-eyed woman and they have ten children, all brown-eyed, can you be certain that the man is homozygous? If the eleventh child has blue eyes, what will that show you about the father’s genotype?
  88. Biology

    During the follicular stage of the menstrual cycle, both FSH and estrogen are high, but aren't estrogen and FSH on a negative feedback loop? Is it just because FSH is not directly involved in the increase of estrogen (it is the follicle that increases
  89. biology

    Need Help with these questions If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand? Compare and contrast mitosis and meiosis as to: number of divisions, number of cells produced, number of chromosomes in parent
  90. biology

    what are organisms that can synthesize energy-containing organic compounds? organisms that add to the total energy stored in organic compounds? organisms that require sunlight in order to survive? choices: a) autotrophs b) heterotrophs c) both any help is
  91. biology 4

    one strand of DNA could be as long as a football field if it were stretched out lengthwise. One of the factors allowing DNA to fit inside the nucleus of a cell is its ability to: A. break apart into separate genes B. extend to form very long, thick
  92. English

    From the play, "Inherit the Wind" What does it mean, when Hornbeck refers to Cates as "boy-Socrates, latter-day Dreyfus, Romeo with a biology book?" Why would he make those references? He is talking about his being an idealist.... a philosopher... not
  93. Biology

    When infected with certain bacteria or viruses our bodies produces a fever. Fevers occur when the hypthalamus changes its temperature set point. Signaling of the hypothalamus could be direct (from infectious agent itself) or indirect (from the immune
  94. biology honors

    Why do leaves tend to be flat.choices that water can easily be absorbed and carried to the rest of the plant. that sunlight can easily penetrate to the leafs photosynthetic tissues. that nutrients can easily enter the plant and be be used
  95. Biology

    Living yeast cells placed in a particular type of red dye (called Congo red) remain colourless. However, dead yeast cells placed in the same dye turn red. Explain this observation.
  96. biology

    In a population that is in Hardy–Weinberg equilibrium for two alleles, C and c, 16% of the population shows a recessive trait. Assuming C is dominant to c, state the percent of the population shows the dominant trait? Show your work. Thank you!
  97. Biology

    Describe how you would prepare 90 mL of a 5 mM NaCl solution from a 2 M NaCl stock solution. Describe your actions–exactly what you would do –step-by-step–when preparing this solution. Also show all calculations. Be sure all amounts include units of
  98. Biology

    Produce a nucleotide sequence with a single base-pair substitution mutation that still produces the same amino acid sequence. Indicate the site of the mutation and explain why the amino acid sequence is not affected.
  99. biology

    a) Describe the niche of the sea lamprey. b) Find out how sea lampreys may have entered the Great Lakes ecosystem. c) Identify the interspecific interactions of the sea lamprey and its effects on the Great Lakes.
  100. Biology

    I have a question: Name the differences in muscles between a weightlifter and long distance runner? A long distance runner has lean muscles but would you say weightlifters have bulk for muscles? I can't find a web site to help me. Any ideas. Thanks