Biology

  1. AP Biology
    How would I calculate water potential? I have the formula but I can't figure out what to plug in. I only have a data table including initial and final mass of a concentration and the molarity of the concentration.
  2. Biology
    Why must the test tubes be thoroughly cleaned and dried when one part of the procedure is completed, before starting the next part of the procedure?
  3. Biology
    What four substances are recycled during photosynthesis and respiration? I’d come up with an answer but I’m confused... Part b: What is one component in photosynthesis that is not recycled and must be constantly available? Thank you.
  4. Biology
    Which of the following statements best explains how the cell membrane regulates what goes in and out of the cell? A. the membrane allows only certain molecules to move into the cell B. the membrane destroys most molecules so that they do not enter the cell C. the membrane ...
  5. Biology
    What kind of chemical bond is involved in forming the primary structure of a protein? What type of bond is a peptide bond?
  6. Check my work
    Danielle likes to work alone and has strong math and analysis skills. She like the challenges of the outdoors and regularly records her observations. For which kind of job would she be most suited? Select two apply. a. Botanist b. Biology teacher**** c. Sales d. Soil ...
  7. biology
    A cell with adefective p53 gene is likely to a. stop responding to growth regulators b. stop dividing to produce daughter cells ***** c. generate hormones that combat tumors d. produce cells without a defective p53 gene
  8. Biology
    which of the following list structures from smallest to largest? A. chromosome, supercoil, coil, nucleosome, double helix B. chromosome, coil, double helix, nucleosome, super coil C. double helix, nucleosome, coil, super coil, chromosome D. nucleosome, coil, double helix, ...
  9. Biology
    Which of the following is NOT considered a biohazardous material? A. Blood and body fluids B. Micro-organisms C. 1 M NaCl solution D. Cell lines C?
  10. biology
    If the surface area of a cell that is shaped like a cube increases 100 times, it volume increases about a. 5 times b. 10 timesc. 100 times d. 1000 times***
  11. Biology
    Hey just wondering if you think my answers right, 1)Biological safety cabinets are not required when working with containment level (blank) materials a) 1, b)2, c)3, d)4 - answer a? 2)Materials in Risk Group (blank) pose the least risk to the individual and the community ...
  12. Biology
    Which of the following lists structures from smallest to largest? A. Chromosome, supercoil, coil, nucleosome, double helix B. Chromosome, coil, double helix, nucleosome, supercoil C. Double helix, nucleosome, coil, super coil, chromosome D. Nucleosome, coil, double helix, ...
  13. Biology
    What's the optimum, minimum and maximum salt concentration of Escherichia coli in food which may lead to foodborne diseases?
  14. Biology
    A student attempts to locate start codons in a region of the genome without the use of the computer algorithm. How many start codons are in the DNA sequence below? Remember, phage use three different codons to indicate the potential start sites of genes (ATG, GTG, TTG). ...
  15. Biology
    Phages have two important structural features that are common to all phages. The first structure, the _________, holds the genetic information or DNA. The second structure, the ___________, aids in attachment of the virus to the bacteria host species.
  16. Biology
    Which of the following is/are feasible within the context of phage research and phage therapy? I. A cocktail of phages personally tailored to an individual’s infection could be used to combat a specific type of antibiotic-resistant bacteria. II. A protein molecule used by ...
  17. Biology
    if the surface area of a cell that is shaped like a cube increases 100 times, it’s volume increases about… A. 5 times B. 10 times C. 100 times D. 1000 times.
  18. Biology
    If we see a DNA sequence in our FASTA file that reads: ATGCCCTTCGGG. What is the corresponding sequence of our double-stranded DNA molecule?
  19. Biology
    How would I figure out how many kilometers in 112 centimeters?
  20. Cell biology
    you ask your lab assistant to prepare IL of solution Zeta at a concentration of 1M. He comes up to you with a 0.5M stock solution ans asks for help in calculating how much to use. what do you tell him? I dont think my answer is correct. I got 2000 mL of stock solution. this is...
  21. Biology 10
    If one lived in a hot country away from civilization, would it seem reasonable that water changes to a solid? What makes an occurrence reasonable? I already looked through Chapter 3 in my Biology book and the answer isn't even in the book all together.
  22. Biology
    Consider the observations you made working with the Paramecium Homeostasis Gizmo. Identify a question about the relationship between the water solute concentration and the number of contractions of the paramecium’s vacuole in a specified number of seconds. Consider writing ...
  23. Biology
    An animal cell that is surrounded by fresh water will burst because osmotic pressure causes... A. water to move into the cell B. water to move out of the cell C. solutes to move into the cell D. solutes to move out of the cell
  24. Biology
    Can someone please explain to me the biological definition of what alternative hypotheses is? I've looked through the paragraphs in my textbook, however, I still can't seem to arrive at a clear understanding of what the definition is.
  25. biology
    which organelle breaks down organelles that are no longer useful? golgi apparatus lysosome endoplasmic reticulum mitochondrion
  26. Biology
    Which of the following is a function of the nucleus? a. stores DNA b. stores sugars c. builds proteins d. packages proteins
  27. Biology
    2. Which macromolecules were present in your saliva and food choices? Explain why you think you got the results you did. food choices: Bread and oil Test indicators: Iodine, copper sulfate, and Sudan III
  28. Biology
    Which one of the following processes requires free forms of thymine containing nucleotides? A. DNA replication B. RNA synthesis C. Protein synthesis D. Starch synthesis E. Cellulose synthesis
  29. Science
    3. How does the study of science benefit society? A. Non scientists in society often use the same experiments conducted by scientists in the laboratory. B. The study of science helps slow down a fast paced society. C. The study of science keeps more people employed than any ...
  30. math
    Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of ...
  31. biology
    Which of the statements is true? a. During active transport, a material may be moved from an area of low concentration to an areaz of high concentration. b. During passive transport, energy is used to move material against a concentration gradient. c. During active transport, ...
  32. biology
    During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will a. move across the membrane to the outside of the cell b. stop moving across the membrane*** c. continue to move across the membrane in both directions d. move ...
  33. Biology
    What is the most consistent with the theory of vitalism
  34. Biology
    Give me three biological procedures applied in onion root tips experiment.
  35. biology
    Which of the following statements about the nucleus is NOT true? a. The nucleus stores coded instructions for making the cell's proteins.*** b. The nucleus usually contains a nucleolus region which is where ribosome assembly begins. c. The nucleus is the site of protein ...
  36. Biology
    Which of the following would you expect to be able to see using a light microscope? a. a virus b. a DNA molecule c. a human skin cell*** d. a protein
  37. biology
    what are platelets
  38. biology
    Which of the following is not a principle of cell theory? a. cells are the basic units of life. b. All living things are made of cells c. Very few cells are able to reproduce*** d. all cells are produced from existing cells.
  39. math
    in a class of 60 student,64 passed biology and 42 passed chemistry.every student passed at least one of the two subjects.How many student passed in both subject?
  40. biology
    Which of the following would differ if you compared the same reaction taking place with and without an enzyme? a. the chemical energy of the reactants. b. the chewmical energy of the products. c. the energy required to start the reaction. d. the overall energy of the reaction...
  41. Biology
    Which of the following would differ if you compared the sam reaction taking place with and without an enzyme? a. the chemical energy of the reactants**** b. the chemical energy of the products c. the energy required to start the reaction d. the overall energy of the reaction
  42. biology
    Which of the following would occur if cells did not have enzymes? a. Reactions in cells would occur too slowly to sustain life. **** b. Reactions in cells would occur too quickly to sustain life. c. Reactants would not be able to combine cells. d. Reactants would combine with ...
  43. biology
    what is the main tissue of heart wall
  44. biology
    what is the function of the digestive food secreted by the liver
  45. biology
    the size of cell of an organism has no relation with the size of the body . do you agree ,give reasons
  46. Biology
    which property of carbon atoms is essential to the creation of lifes molecules?
  47. biology
    How is a protein different from a carbohyrate? a. The monomers that make up a protein are called amino acids whereas the monomers that make up a complex carbohydrate are called simple sugars (monosaccharides.) b. Proeins function as energy storage polymers whereas complex ...
  48. Biology
    how many molecules of carbon dioxide are shown in this equation6CO2 + 6H2O → C6H12O6 + 6O2
  49. biology
    we do not sense any pain when we cut our hair or clip our nails why?
  50. Biology
    What selective advantages drove the development of sexual reproduction, and how did it develop?
  51. biology
    why left side of heart pumps blood harder then the right side?
  52. biology
    Which of the following is not true about water molecules? a. Water molecules are polar b. Water molecules form hydrogen bonds c. Water molecules form ionic bonds *** d. Water is an effective solvent
  53. biology
    what organs form the human respiratory systems
  54. Biology
    Which of the following is true about an acidic solution? a. it's pH is below 7 b. its hydrogen ion concentration is low c. it is neutral d. it can act as a buffer
  55. Biology A
    A lab technician runs the results of a simple PCR reaction through a gel electrophoresis to test a sample of imported hamburger meat for the presence of a DNA sequence that is known to be found in kangaroos and not in cows. What exactly will he be looking for? A) A green glow ...
  56. Biology
    Can you please help me how the factors: cell boundaries, concentration, concentration gradient, equilibrium, permeability affect cellular transport.
  57. biology
    Crude oil is delivered from which of the following materials? A. Marine organisms B. Plants C.Rocks D.Salts
  58. biology
    What are the uses of circle transparent to cell with the uses of bacterial
  59. Science
    Can someone explain grade 9 biology translation and transcription for me? My teacher doesnt explain it well. I cannot understand it at all. Detailed description please and easy to understand.
  60. biology
    I am a bit confused about the relationship between DNA and Amino Acids. Do DNA make Amino Acids? Thanks in advance.
  61. Biology
    Pretty confusing AS Biology question: A scientist carried out an experiment to separate the organelles in an animal cell by mass. The scientist mixed the cells with a buffer solution which had the same water potential as the cells. He then broke the cells open with a blender ...
  62. Biology 9th grade
    12. Complete the following monohybrid cross. Two parents that are heterozygous for brown eyes. Be sure to identify the genotypes of the parents, complete the Punnett square, identify the phenotypes with genotypes and the ratio of the phenotypes. What percent of the offspring ...
  63. biology
    The Excretory System removes excess… W _ _ _ _ _ _ _ T _ _ A _ _ _ _ - _ I _ _ _ _ _ I have water salts but I'm not sure for the last two I believe its waste for one but the other I don't know
  64. biology
    savanna plants are decidous explain in few lines no2 state 3 adaptive features of plants in arid land
  65. biology
    Name the type of viral infection shown in the cycle that includes stages 1->2->3A->4A I'm so lost can someone help?
  66. Biology
    I need help in bio anyone take bio B I’m desperate
  67. Biology
    How big of a band on a gel would you expect to see for the 41-repeat allele?
  68. Biology
    If your mom had alleles containing 18 and 21 repeats and your dad had alleles containing 18 and 24 repeats, what is the change you will be homozygous for the 18 repeat allele?
  69. Biology
    If, on your gel, you saw only one band, how would you describe your genotype?
  70. Biology
    How many repeats do you find in the most common D1S80 allele?
  71. Biology
    Calculate the molality and molarity of 16% aqouos methanol by volume density 0.9g/ml
  72. biology
    What biome has the largest biomass ?? Tropical Rain forest (assuming it is excluding the ocean)
  73. Biology
    Describe the microbial loop and role of viruses simplified. I just dont understand it if anyone could please help or suggest a website?
  74. Biology
    Why can you not use human DNA polymerase when you perform PCR?
  75. Biology
    Why do you think biologists use both the embryological development and the adult body plans to classify an animal? My answer: Biologists use both because there are many different phyla in the adult body plans. The embryological development help differentiate the classification.
  76. Biology
    What biome as the largest biomass? Taiga? Where do migratory birds go to nest ? Which biome?
  77. Biology
    Many different factors can cause low crop yield. Which factor listed is a biotic factor? A) drought *** B) hailstorms C) poor soil quality D) insect infestation
  78. Biology
    How might large animals living in a group deal with a food shortage? A) by reproducing B) by shedding C) by migrating D) by fasting*** Pls help! Thank you! (=
  79. Biology
    How does biodiversity affect ecosystem functioning? How does biodiversity affect ecosystem stability and resilience? I need help with this please I do not understand anything of these questions.
  80. biology
    Describe the correlation between functional groups and the reversible processes of Dehydration Synthesis and Hydrolysis.
  81. Biology
    Natural selection is an example of a mechanism of evolution. Does this mechanism produce a change in individuals or populations? Explain!
  82. Biology
    what is the sister phylum to echinoderms, so based on a quick online search I think its hemichordates, Can anyone confirm (my notes dont say what it is)
  83. Biology
    what is the sister phylum to echinoderms, so based on a quick online search I think its hemichordates, Can anyone confirm (my notes dont say what it is)
  84. Biology (Answer ASAP Please)
    ok i need help with this like ASAP. Please math the following terms to their corresponding cell structure Cytoplasm [ K ] Flagella [ H ] Smooth Endoplasmic Reticulum [ ] Cilia [ ] Mitochondria [ ] Golgie Apparatus [ ] Chromosones/Genes [ N ] Rough Endoplasmic Reticulum [ ] ...
  85. Biology
    If living things are composed of cells, this means that they demonstrate ______________. A: Cellular Organization<--(My Answer) B: Organs C: Cellular Organisms
  86. biology
    Some antifungal medications can damage the patient’s own tissues. Why doesn’t this problem occur with antibiotics? Thanks!
  87. Biology
    Name a specific region of a plasmid vector that is helpful in DNA cloning. Is there a specific article that explains the answer? There are no choices to the question.
  88. Biology
    Hypothetical: what if someone were to cut the layer of skin on the eyes of a Spalax mole (blind mole rat) off? Would they not be blind anymore, or would that cause a big disfunction with the mole?
  89. Biology
    How many alleles for a specific gene can any single gamete contain?
  90. Biology
    Which technique or device is used to determine probabilities of allele combinations in offspring?
  91. Biology
    What volume range is a P20 (micropipette) useful for?
  92. Biology
    Which rule of probability is used for mutually exclusive outcomes?
  93. Biology-ASAP Bob Pursley to the resuce?
    a)The blank is the probability of erroneously rejecting the null hypothesis.I said level of significance, is that correct? b)If you P value is 0.05. Does that mean that 95 times out of 100, the null hypothesis will be falsely rejected (I feel like it should be 5)
  94. Biology
    Chordate (not a primate) •Explain how body plan and anomoty enables chordate to perform the essential functions it needs to survive. •Explain how your chosen chorodate fonts into the cladogram of chordate.
  95. 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 that people working ...
  96. biology
    which biome has a low temperature, low precipitation, and low soil/nutrient content?
  97. Biology: Organisms
    Match the kingdom with the correct classification scheme. [D?]Eukaryotic, multicellular, heterotrophic organisms [B?]Prokaryotic, unicellular, autotrophic &/or heterotrophic, harsh enviroment, no peptidoglycan [A?]Eukaryotic, unicellular or multicellular, heterotrophic [F?]...
  98. Biology
    Class Actinomycota is found in which phylum? It also secretes its own antibiotic. Why?
  99. Biology
    Explain how strep-throat is able to stay in its ideal environment?
  100. Biology 20
    List the substances that the colon absorbs: - vitamins like B and K - water - ions like chloride and sodium Is there anything that I am missing? I am sure these are right but are there more??
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