science, biology

41,099 results, page 70
  1. biology help please- check my answer???:)

    What happens during photosynthesis? A)Heterotrophs consume ATP. B)Heterotrophs produce ATP. C)Autotrophs consume carbohydrates. D)Autotrophs produce carbohydrates. I think its D.
  2. biology

    What happens to denatured enzyme? Explain the reason with the help of the lock and key model. -i can explain for the denatured enzyme but how can i expalin it in term of the lock and key model....
  3. Biology

    Under which condition can you hold your breath longer? First breathe in as much as you can and hold your breath, and time it. (Lungs completely inflated) After, breathe out as much as you can, hold your breath, and time it. (Maximal expiration). Which
  4. biology

    A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the
  5. biology

    A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the
  6. 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
  7. Biology

    In recent years phytoplankton have been investigated as a potential source of energy for humans. Researchers have therefore been interested in whether these organisms could be ‘farmed’ to provide food or fuel. In terms of biomass, Gross Primary
  8. Human Biology please help

    components of sense and smell Olfactory receptors in the nose travel directly to the olfactory (A)__________ before arriving at the olfactory cortex in the frontal area of the brain. This part of the brain has a direct link with the amygdala, which is
  9. 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
  10. Biology

    Which is the correct base pairing: Adenine - Guanine Adenine - Cytosine Thymine - Guanine Thymine - Adenine Cytosine - Thymine
  11. science

    49. A researcher writes a grant proposal to repeat an experiment that was recently published by another researcher. Which of the following statements best supports the grant proposal? A. Funding this grant proposal will allow this laboratory to continue to
  12. Biology

    10. Which of the following is NOT true about the digestive system of annelids? a. It contains setae to move the food through the anus b. It is similar to an open tube c. It passes nutrients through the intestinal wall to the bloodstream d. It stores soil
  13. Biology

    10. Which of the following is NOT true about the digestive system of annelids? a. It contains setae to move the food through the anus b. It is similar to an open tube c. It passes nutrients through the intestinal wall to the bloodstream d. It stores soil
  14. teachers aide curriculum comtent

  15. science

    Posted by Josh on Saturday, March 17, 2007 at 10:58pm. How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? For Further Reading science - DrBob222, Saturday, March 17, 2007 at
  16. English

    I need you to check the question and my answer to it. Shall I include more details in the question? In sentences 3 and 5 I don't know which connectors to use (to express a contrast between two different concepts). How can't find a suitable verb to finish
  17. Biology

    Herring live in salt water. which do they have to do..expel large amounts of water to offset osmosis, need to take in large amounts of water of offset osmosis, slowly dehydrate over the course of their lives, or slowly swell upover the course of their
  18. English

    I urgently need you to revise this email. Thank you very much in advance. 1) My science colleague is willing to work on a project in English concerning ecology with some of her students in the years 10-11. 2) Though we haven't got a bilingual branch at the
  19. Biology

    b) Identify one similar and one different way each type of cell [prokaryote and eukaryote] uses flagella. My answer: In both prokaryotes and eukaryotes, flagella protrude from the cell's surface and enable movement. Prokaryotic flagella rotate, propelling
  20. physical science

    how does matter connect to science? how does matter connect to the world? how does matter connect to you? how does matter connect to math?
  21. math-5

    Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. multiply 1/2 by 3 c.
  22. 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
  23. Biology

    Which of the following is the balanced equation for photosynthesis in plant cells? A 3C0+ 3H0 + Energy --)-CH120 + 30 2 266 2 B. 6C0+ 6Hp + Energy--)-CHp + 60 2 616 2 C. CH0 + 30--)-3C0+ 3H0 + Energy 6126 2 2 2 D. CHp + 60--)-6C0+ 6Hp + Energy 616 2 2 I
  24. Biology

    When a teapot boils, we see a white cloud rising from the spout. The white cloud is composed of: A. water in the liquid phase B. water in the gaseous phase c. water molecules coming apart to from H+ and OH- ions D. H+ and OH- ions coming together to form
  25. language arts

    abc order for geology geography geologist graphite autograph photograph biopsy biology biosphere transact enact actor react import transport portable export When you get them in ABC (alphabetical) order, please re-post and we'll let you know how you did. A
  26. biology plz help

    Holly knows from talking with Renee that genes control traits and are determined by the sequence of nucleotides. When that sequence of nucleotides is altered for some reason during DNA replication, it can lead to the gene being expressed in a different way
  27. Biology

    We cut a slice of the target gene from the gel which ran electrophoresis. And then purified the gene from the gel by using Gel-M column, WN buffer and WS buffer. After these steps, we ran another electrophoresis of the purified gene and there was no band
  28. Biology

    Imagine you start an experiment with two vials of flies. One fly vial has 20 flies, the other has 200 flies. After 20 generations of mating, which vial has lost the most alleles across the genome? Has genetic variation increased or decreased within each
  29. Biology

    Compared with a smaller cell, a larger cell of the same shape has a. the same surface-to-volume ratio. b. a smaller cytoplasm-to-nucleus ratio. c. less surface area. d. a smaller average distance between its mitochondria and the nucleus. e. less surface
  30. Biology

    Using RNA a s a template for prot e in synthesis instead of t r ans l a t ing prot e ins directly from the DNA is advantageous for the cell because A) RNA is much more stable than DNA. B) RNA acts as an expendable copy of the genetic material, allowing the
  31. 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
  32. 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
  33. Biology - Genetics

    What is the expected genotypes and phenotypes of F1 flies in the cross between virgin brown eyed female with scarlet males (genes for brown and scarlet eyes are on different autosomes)? I know that brown eyes and scarlet eyes are both recessive but I'm not

    Is there any websites for teens to read short stories (or long), then you answer ONLY multiple choice questions, grade you, and to have a profile or something to see all of your grades if your making progress each time (to see if your improving). I want to
  35. Biology Imagine you had made an RNA copy of each strand of a DNA double helix. If you were now to mix these two RNA single-strand copies together, do you think they would form a double-stranded RNA
  36. Biology

    Which example best illustrates the difference between a community and a population? A)The two terms are interchangeable, a population IS a community. B)All the people in a town would be a community; all their cattle would be a population. C)All the people
  37. biology

    what is a microscope who uses a microscpe when was the microscpe discovered who discovered the microscope
  38. biology

    What’s one advantage to being eukaryotic rather than prokaryotic? What’s one advantage to being prokaryotic rather than eukaryotic?
  39. Biology

    PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of
  40. biology

    A man with brown eyes and dark hairs (whose father was blue eyed),marries a woman with blue eyes and blue curly hairs (whose mother was red straight hair). They have 4 children. What is the genotype of children 1)BbRR:BbRr:bbrr:bbRR 2)BbRR:BbRr:bbRr:bbRR
  41. 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 I chose a) evaporation of the
  42. Biology 10B

    According to the pressure-flow hypothesis, which of the following statements is not true • Water moves from the xylem to the phloem of a plant. • Water is necessary for sugars to move through phloem. • Phloem is able to move sugars in either
  43. AP Biology

    A biologist measured the amount of DNA in several single diploid cells taken from a culture. He knew that these cells could divide mitotically, but not meiotically. His data is shown below: Cell Number and DNA content in micrograms: Cell 1 (11.1
  44. Math

    In Mrs. Wallace's science class one half of the students are boys of the boys 1/8 or left-handed what fraction of the students and Mrs. Wallace's science class are left handed
  45. cell biology

    1.The________particle halts the translation of the mRNA to a polypeptide before checking to the ER a. singal recognition, permanently b. signal recognition protein receptor, permanently c. singal recognition, temporarily d. signal recognition protein
  46. Molecular Biology

    You are working in a lab that has recently discovered a new viral protein. Describe in detail how you could generate a polyclonal antibody preparation against this protein. Include a full description of production and purification. Describe in detail an
  47. biology

    How does mitosis in plant cells differ from that in animal cells? A. Animal cells lack a cell plate. B. Plant cells lack centrioles. C. Plant cells lack spindle fibers. D. Animal cells lack cytokinesis. I chose b but I got it wrong please help....
  48. Biology

    |Question| Living organisms are composed of millions of organic compounds, each having a unique structure. What element is responsible for this huge diversity of molecules? Describe the diversity of structures that can be formed and the properties of this
  49. 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
  50. Anatomy/Biology-Please check

    I'm posting this again today hoping someone can clarify this for me-I've posted it prior but no one answered yesterday so I'll try again. Thank you in advance I have two question 1.In a dehydration synthesis reaction which of the following occur- a.
  51. Math

    You have 34 math and science problems for homework. You have 10 more math problems then science, how many of each do you have?
  52. Science

    Please help me on my science homework....Motor A uses 1000 joules of energy to move 200 newtons of force a distance of 3 meters. Motor B uses 1200 joules of energy to do the same job. What is the difference in percent efficiency between Motor A and Motor
  53. Biology

    How is it a solution of 300mOsM NaCl is both isotonic and isosmotic to a red blood cell with an osmolarity of 300mOsM? Yet a solution of 300mOsM urea is only isosmotic to that red blood cell?
  54. biology

    How does photosynthesis work? wikipedia has stuff type photosynthesis in google! or type this in google "how stuff works photosynthesis" Well,basically just go to google and search it up!LOL! Go search it on Google!
  55. urgent mc biology

    After the blood in is the left heart you would next find it (a)entering the lungs. (b)entering the tissues, like muscles. (c)entering the right heart. (d)leaving the lungs. (e)leaving the tissues, like the muscles. Please help
  56. biology!

    A person has the blood group AB, what determines this blood group? a) different alleles on different chromosomes b) different alleles on the same chromosomes c) the same alleles on different chromosomes d) the same allele on the same chromosomes I thought
  57. biology

    Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a
  58. Biology

    17. When errors in nucleotide sequencing occur, a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one c. purines replace pyrimidines in the DNA
  59. Biology

    17. When errors in nucleotide sequencing occur, a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one c. purines replace pyrimidines in the DNA
  60. Biology

    Based partially on his comparative studies of the fossils of woolly mammoths and the bones of modern-day elephants, Georges Cuvier proposed several new ideas about the history of life on earth. Which general statement can be made about this example?
  61. AE

    You're an elementary teacher in a self-contained classroom. You've got a class of 29 lively sixth graders, and you've been struggling all year with classroom management. Damien, a larger than average boy, seems to resist your efforts at every turn. You
  62. 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
  63. biology

    Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A - A eukaryotic cell is like a college campus was a prokaryotic cell is like a one-room schoolhouse B - A eukaryotic cell is like a flip phone
  64. biology

    ) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table
  65. Biology

    When errors in nucleotide sequencing occur,? a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide. b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one. c. purines replace pyrimidines in the DNA
  66. Biology

    A drop of two dyes, A and B were placed on the surface of gelatin in two test tubes. After 24 hours dye A and B had traveled 2.7 and 1.8 cm below the surface of the gel in their respective tubes. Calculate the diffusion rates. Why dye has a larger
  67. science

    list as many ways as u can how are crystalline solids connected to science? how are crystalline solids connected to math? how are crystalline solids connected to the world? how are crystalline solids connected to you? why is it important?
  68. math lit, geography, life science,business studies

    hey there! what career can do with math lit, geography, life science and business studies?
  69. Biology

    7) The dumping of large amounts of raw sewage into rivers or lakes typically leads to massive fish kills, although sewage itself is not toxic to fish. Similar fish kills also occur in shallow lakes that become covered in ice during the winter. What kills
  70. Biology

    "Emma has difficulty sleeping. Her doctor prescribes Deflex. Deflex is a drug which affects the nervous system. Suggest and explain how Deflex affects the nervous system to help Emma sleep." I have missed a lot of time off of school and I understand how
  71. Biology

    Wine is made by mixing yeast with grapes and allowing the yeast cells to undergo fermentation. Sparkling wine is a type of wine that contains high levels of dissolved carbon dioxide. What is the source of the carbon atoms in the carbon dioxide found in
  72. University Research-level Biology

    Hello, this is an upper-level question, and I would sincerely appreciate help before Tuesday. I am reading a journal article, and there is one conclusion in it that I do not understand. It predicts a postsynaptic mechanism when EPSP amplitudes do not vary
  73. Science (I am new in this website)

    Is there any website I can find pictures of MAMMALS? I need Mammmals Pictures for a science project in school. PLEASE HELP BECAUSE THIS IS MY FIRST TIME IN JISKHA!!!!!!! (I AM NEW) THANK YOU! Try going on Google, clicking on Images, and type in Mammals.
  74. Ap Biology

    Unprotected skin cells mutate at a rate of 20% when exposed to 10 rads of UV radiation. A group of scientists tested whether Sun Screen X will decrease the mutation rate. 1100 cells were tested, exposed and counted. Only 200 cells had mutated, 900 cells
  75. Biology

    Which solute out of protein, urea, glucose, chloride, ammonia, "substance x" cannot be filtered into the nephron? Why? I know that urea, protein, and chloride ions can be filtered. I don't know about glucose, ammonia or substance x. Is glucose found in the
  76. earth

    for this question: Put the folloing words together in a few sentence to explain their meaning and relationship to one another: seismic waves, seismograms, seismoghaps, and seismologists. is this answer suitable: Seismic wave is an elastic shock wave that
  77. Biology I

    Charles Darwin- Evolution? 2) Where does variation occur within an organism that causes evolution? 5) What is the main source of evidence for evolution? 6) What was the occupation that Darwin was originally studying for? 8) What did Darwin believe about
  78. Biology

    Which solute out of protein, urea, glucose, chloride, ammonia, "substance x" cannot be filtered into the nephron? Why? I know that urea, protein, and chloride ions can be filtered. I don't know about glucose, ammonia or substance x.
  79. Biology, Cell Division

    With each cell division , the chromosomes are divided between 2 daughter cells, yet the number of chromosomes in each cell does not change. What process ensures that the normal number of chromosomes is restored after each cell division? During which part
  80. 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
  81. Biology

    Match the terms with the appropriate descriptions. Digestive Excretory Skeletal Circulatory Nervous Respiratory Reproductive _______________________ A. coordinate body activities-nervous B. Removal of waste products-excretory C. Body support and
  82. (19) Chemistry - Science (Dr. Bob222)

    Use the following information to answer this question: Cu+(aq) + e- → Cu(s) E° = 0.521V Cu2+ (aq) + e- → Cu+ (aq) E° = 0.153 V. Given these half cell reactions, an aqueous solution of Cu+ ion in the absence of O2(g) : A. will be
  83. science

    Will you please let me know if you think my Problem and Hypothesis is what my teacher is looking for? This is my first science project and I want to achieve an A. I am testing how heat input can affect the velocity of the ocean currents. PROBLEM: Does an
  84. English

    hello, I have to write a research paper on a paticular author. I chose Mary Shelly since we just finsihed reading Frankenstein. I need to narrow down my topic to make it more specific. I don't know how to start. I want to somehow relate her life with

    The springtail is a very common small insect that lives in rotten logs, rich soil, and other humid places. Its cuticle is water repelling (hydrophobic) except for a strange organ, the collophore, on its ventral side. Because it lacks the excretory organs
  86. Biology

    _____________provided significant sources of energy on early Earth, and were most likely involved in the origin of life. Options A) Volcanic activity, violent thunderstorms, and ultraviolent radiation B) Bombardment from meteorites, gamma radiation, and
  87. English

    I urgently need you to check these sentences I have to include in an e-mail. As far as the project is concerned, I would like to know the opinion of your science teacher. I hope they will help me find the proper words. 1)Thank you for your email of today.
  88. 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
  89. biology

    Given a colored end product is produced, the presence of protein could be detected by spectrophotometry. Outline how you would go about determining the appropriate wavelength to use and the amount of protein in a sample. For the first part, is that like a
  90. Biology

    What are some analogies for Endoplasmic reticulum and Nuclear Reticulum Go here for endoplasmic reticulum

    1.Three fatty acids form a triglyceride with one glycerol. What similarities would the fatty acids have with polysaccharides? What differences? 2. When you consume more food than you require, the mitochondria in the liver are involved n forming
  92. biology

    A researcher wanted to know how many fish were in a dam.He caught 20 fish and marked them by clipping out a small section of their tail fins.He then released them back into dam.A few days later he caught 25 fish and found that 8 had been marked 1.estimate
  93. Biology 202

    Can someone please help me with one part of this question.... Discuss target cell activation by hormone-receptor interaction. What are the steps involved? On what factors does this interaction depend? I know the second part to the question (on what factors
  94. Biology

    Male donkeys have 62 chromosomes in an eye cell. How many chromosomes would be found in a female donkeys egg? Answer: 62 Normally, pigs have 38 chromosomes in each somatic cell. How many chromosomes are there in a cell that has gone through meiosis?
  95. 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
  96. Biology

    What is true of the energy that is passed from one trophic level to the next in a food chain? A)About 10% of the energy passed from one level to the next is released as heat. B)About 10% of the stored energy of one level becomes stored energy at the next
  97. Language arts: check my answers

    For questions 7–15, rewrite each sentence, adding commas where needed. (7) While I was researching skateboards I found an interesting old newspaper story. (8) In the June 29 1999 edition of the Mercury there was an article on skateboarding. (9) Some
  98. Biology

    All known proteins in cells adopt a single stable conformation because (a) any chain of amino acids can fold up into only one stable conformation. (b) protein chains that can adopt several different conformations have been weeded out by natural selection.
  99. math

    please help me solve this problem quickly! John and Melanie are designing a science experiment for the school science fair. Their experiment requires a large amount of copper wire. They need 22 spools of copper wire that each contains 31 meters of wire.
  100. Biology

    How do the kidneys clean the blood? (1 point) • Kidneys clean the blood by breaking down nutrients. • Kidneys clean the blood by filtering it to remove wastes. • Kidneys clean the blood by absorbing nutrients. • Kidneys clean the blood by