science, biology

40,893 results, page 54

  1. biology

    how does the REM help create a sleep signal sent from the pons in the brain that helps to stop motor neurons in the spine when a person sleeps. Please help me! I am looking for detailed information right down to the certain proteins and such! I have searched everywhere and ...
  2. biology

    A devastating tsunami wipes out most of the population of a frog species that lives on just one tropical island. What is the most likely outcome of this event? A) frequency-dependent selection B)inbreeding depression C)rapid adaptive evolution D)purging of all deleterious ...
  3. science

    I have no clue how to do this... For a science fair experiment, you decide to testa cartain type of plant to see how well it can grow when it is kept out of sunlight. For two weeks, the plant leaces stay greean then they begin to look yellow. Use the terms photosynthesis, ...
  4. science

    Ivneed help on Life Science homework. the question is: How do seedless vascular plants reproduce? I don't get it. my other question is: HUH???????????? Vascular plants reproduce by releasing spores. Yes they do and it is actualy fasinateing. ps if any thing is spelled wrong ...
  5. Health and science

    Explains the science, technology, engineering and/or mathematics behind a solar cooker that work day and night and how could a solar cooker that works day ajd night both address the everyday problems and have a broader impact locally or globally.
  6. biology

    After how many cells does the zygote start to differentiate? What is it called after the 8 cell stage? How many cells would be in the next stage of development? Are these embryonic stem cells? Many thanks Amanda x
  7. college biology

    if you have a father who is type A heterozygote blood and married to a woman who is type B heterozygote blood, find all the children's possible blood types and ratios.
  8. biology

    John has blue eyes, blue eyes are recessive to the dominant trait for brown eye color. his genotype is bb . What is johns phenotype? A. brown B. Bb C. Blue D. bb My best answer is B
  9. Biology

    John has blue eyes, blue eyes are recessive to the dominant trait for brown eye color. his genotype is bb . What is johns phenotype? A. brown B. Bb C. Blue D. bb My best answer is B
  10. biology

    What are the four basic subunits for each of the four major categories of biochemcials? Better yet... what are the four major categories of biochemicals?! Please help, I can't find the answer anywhere!
  11. Biology lab - hypothesis?

    For each of the observations, list a possible question, hypothesis and prediction. 1. Observation: Chicken soup seems to cure a cold. Question: Hypothesis: Prediction:
  12. Biology

    What will happen to a turgid plant cell with an initial water potential of 0.5 MPa when dropped into a large beaker of water and solute that has a water potential of -1.5 MPa?
  13. biology

    another way to afect the enzyme is lowering the pH of the solution. However, lactase is supposed to be able to work in the stomack. Would lowering the pH of the enzyme solution affect the enzyme? Why or why not?
  14. biology

    Identify the blood types arising from each of the progenitor cell types: a)Myeloid progenitor cells b)Lymphoid progenitor cells No one has answered this question yet.
  15. biology

    If the first child of a couple was without dimples, an recessive trait, what is the chance that the second child will be born without dimples? A) 100% B) 25% C) 50% D) Cannot be determined from the phenotype of the child
  16. 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?
  17. Science project fair

    Hello: My daughter is in 4th gde and is about to turn in her displayboard but we are not coming up with a good title. She wants to title it "Flowers with sweet tooth". In her science projct she has discovered that sugar helps cut flowers live longer than with just water. Do ...
  18. Genetics/Biology

    What kind of inheritance is it when the offspring have spots of different colors from its parents? Like a brown dog with a white dog makes a white/brown spotted dog.
  19. Biology

    ok give me examples of a ploymer that follows these conditions it must have at least 100 atoms it must have at least 3 monomers it must be organic, from a living thing thanks so much!
  20. Biology - The Bladder

    What is the trigone of the bladder bounded by? a) top of fundus and uretal orifices b) major and minor calyces c) orifices of ejaculatory ducts and urethra d) uretal and internal urethral orifices
  21. Biology

    Explain the meanings of Mendel’s principle of segregation and principle of independent assortment. Under what circumstances does the principle of independent assortment hold true? Give an example in which this law does not apply.
  22. 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?
  23. Biology

    Hi there, I am doing a genetic debate on the topic "Xenotransplantation should receive all the funding that stem cell reasearch now receives." I am against this idea and I must take on the role of a patient who has contracted a disease after an xenotransplantion. Could you ...
  24. Science

    I am working on a year 10 physics assignment on road science. I am trying to figure out the reaction distance of a car with: Skid marks = 24m Reaction time = 1 sec Decelaration rate = 6m/sec I have many formulas in my book and am unsure of which one to use and what the correct...
  25. biology

    i have two questions about cellular respiration that i cant get..: 1. why do you keep breating heavily for some time even after you have completed strenuous excercise? (i think this has to do with lactic acid fermentation???) 2. why do winemakers want to keep fermenting grapes...
  26. Biology

    The trachea is ___________ to the lungs Toes are _______________to the shoulders Esophagus is _____________ to trachea Pinna is ______________ to tail Liver is ______________ to stomach Options are Anterior, Posterior, dorsal, ventral, lateral, median, superior, inferior, ...
  27. biology

    Hey, I was wondering out of alveoli and red blood cells which had the larger surface area to volume ratio, and whether the one with larger would be generally more efficient in diffusion. Any help or other info on this would be very much appreciated :) Thanks
  28. biology

    Selena noticed that the sand at the beach seemed much warmer than the water. She wondered whether that was because water took more enrgy to heat up than land. I don't understand. What I would like to know here, is what would be the dependent and independent variable. And what ...
  29. Biology (PLZ HELP)

    Researchers discovered that zooplankton in Narragansett Bay now graze on floating algae more actively through the winter than they ever did before. What effect do you think this might have on the annual late-winter "bloom" of algae that occurs in the water?
  30. biology

    hi, I am studying for an exam and I am trying to really understand the processes of things. So, in a cardiac muscle (everything else normal) what would happen if sympathetic stimulation does not lead to the phosphorylation of Troponin-I? I am asking specifically in regards to ...
  31. science

    earth science Which ancient device for measuring time is similar to decorative garden sundails used today a.the shadow stick of the ancient egyptians b.the water clock of the ancient Greeks c.the weight -driven mechanical clocks of the 14th century d.the pendulum clocks of the...
  32. biology

    which animals eat butterflies? i know that birds do feed on butterflies even though they are hard to catch, but what else? please tell me any other animals that feed on butterflies. thanks you.
  33. Biology

    Olga Oompah has red hair and marries Oliver Oompah who has blue hair. They have 32 children. What is the color of their children's hair? This has to do with the punnet squares!
  34. Biology-Genes

    red fish-recessive green fish-dominant -Can two red fish mate and have green offspring? Vice Versa?
  35. carbon!

    Why is that carbon can form an infinite number of molecules? http://web.jjay.cuny.edu/~acarpi/NSC/10-organic.htm http://www.scienceclarified.com/everyday/Real-Life-Chemistry-Vol-2/Carbon.html http://biology.clc.uc.edu/courses/bio104/carbon.htm
  36. biology

    Discuss how the concept of time applies to ecological situations and evolutionary changes. Do ecological time and evolutionary time ever correspond? If so, what are some examples? i don't get this question at all...please help thanks in advance
  37. Biology -Nervous System

    A person touches a stove, withdraws his or her hand, and then yells. Why does the yelling occur after the hand is withdrawn? Does the person become aware of pain before the hand is withdrawn?
  38. AP Biology

    The type of learning that is involved in predator/prey interactions where an alteration in behavior is a response to stimulus is called...? -Habituation Learning? -Cognitive Learning? -Instinctive Learning? -Associative Learning? -Non-associative Learning?
  39. Biology

    what would b possible sources of errors for a potato experiment involving osmosis with potato going into salt solutions ( 50% and 25%) and also potato going into 100% distilled water?
  40. Biology (PLEASE HELP)

    Suppose you are studying a population of sunflowers growing in a small field. How would you determine the population density of sunflowers in a square meter of the field and in the entire field? Describe your procedure.
  41. biology

    9. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 10. For the radar in #9 above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the radar ...
  42. Biology

    What is the result of a cross of a heterozygous curly winged fly to a straight-winged fly? (Include both genotype and phenotype with fractions of each) Do I need to make a monohybrid cross or a dihybrid cross?
  43. Biology

    In the microscope activity, you viewed some of the same specimens under multiple microscopes. Describe the differences in what you could see under each microscope. Which microscope would view small specimens the best and why?
  44. Biology

    The rate of oxygen uptake by gills depends on the surface area, the number, and the thickness of the lamellae across which oxygen must diffuse. What are two ways to increase the rate of oxygen uptake?
  45. biology

    would you consider that eukaryotic cells got rid of their cell wall to benefit as a heterotroph? They must of had a cell wall to begin with because all cells come from prokaryotic cells.
  46. Biology: Genetics test

    14. DNA replication occurs in the _________ of __________ cells. A: Nucleus : Eukaryotic <--*My Answer* B: Nucleus : Prokaryotic C: Nucleus : Plant and Animal cells only D: Cytoplasm : Eukaryotic
  47. Biology

    Sorry for reposting but I really need help with this question and I've waited several hours. What is the trigone of the bladder bounded by? a) top of fundus and uretal orifices b) major and minor calyces c) orifices of ejaculatory ducts and urethra d) uretal and internal ...
  48. 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 change in chromosome i...
  49. This is for alex, who had needed help with biology

    Hey buddy, so I found my notes and I will post for you tomorrow, if you still need me to do so. Let me know if you still need them. I haven't looked over them in detail, so I can't ensure that they will answer everything you needed help with, but I am sure they will be of use ...
  50. 9th grade biology honors

    What would happen if you placed a grape in a bowl with highly concentrated sugar water? and also i need help with this question: "Talking about osmosis, what would happen to a jellyfish placed in a freshwater lake?
  51. BIOLOGY

    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.
  52. 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?
  53. 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 criminal Not sure help?
  54. Biology/help please

    Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example Can you help me...
  55. biology

    Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example 7- Cilia an ...
  56. Physical Science

    I forgot to add this question into my other Physical Science Posts..sorry What is the difference between mass and weight? Mass is what an object contains inside. Weight is a measure of how strongly gravity pulls on that matter. [I got this from the internet but still need to ...
  57. Science

    Your Science Club is tutoring some younger students in astronomy. You hear one student describe how people on Earth can never see “the dark side of the Moon.” You know that is an inaccurate statement. What reasons would you give to explain to the student that “far side ...
  58. Biology

    Differentiating the affects of environment vs the affects of DNA and how they affect "who we are" is often quite difficult. Other than 'Twin Studies' do you have any suggestions of how we can study which one - environment or DNA affects each trait more?
  59. biology

    Data Table: Rate of Photosynthesis Trial # Number of Bubbles/Minute 1 2 3 4 5 6 7 8 9 10 Trial 1 1 4 6 9 10 12 13 15 18 20 Trial 2 3 7 11 14 16 20 25 28 32 35 Making a Graph 2. In the space below, make a line graph showing the data from both trials
  60. BIOLOGY!

    In order to keep veggies crisp, grocery stores use coold water or ice. Which would keep veggies crisper, tap water or distilled water? Explain. I have no idea...
  61. Biology

    1. Why must DNA be able to make copies of itself? 2. Define DNA replication? 3. What is the first step that must occur in DNA replication?
  62. biology

    I understand that a prokaryotic cell has ribosomes smaller than 70s. But what i don't understand is what 70s accutually means. Please could someone explain what 70s means to me? thank you
  63. Biology!!

    Would a cell make enzymes for other cells? For example, would a cell make a lysosomal enzyme and send it to a different cell?
  64. biology

    The length of DNA HELIX occupied by one nucleotide pair is 3.4 angstroms. What is the length in angstroms of this unknown DNA fragment? How do you calculate Angstroms?
  65. Biology

    If you cross 1 inflated pea pod with a constricted pea pod and all of the offspring turn out inflated,is inflated dominant or recessive?
  66. Biology

    How can NaHCO3 function as both the acidic component of the NaHCO3/Na2CO3 buffer system and as the basic compnent of the H2CO3/NaHCO3 buffer system?
  67. Biology

    During transcription, when RNA nucleotides form base pairs with the DNA template, does this mean that RNA nucleotides and DNA nucleotides pair up?
  68. Biology

    My AP Biology class is exploring alpha amylase production in germinating barley seeds. There are three treatments the seeds, or more specifically the half-grains, are put in. 1) half grains with no embryo and no GA 2) half grains with an embryo present 3) half grains with no ...
  69. Science

    Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...
  70. biology

    What is the relationship between mass, weight,and gravity? Mass and gravity determine your weight? correct
  71. BIOLOGY

    Is DNA found in the nucleus, cytoplasm, or both? Is RNA found in the nucleus, cytosplasm, or both?
  72. Biology

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

    A plant's cell wall is made of cellulose fibers. What is the purpose of a plant's cell wall?
  74. Biology

    Hi My bio HW is asking what are the symptoms and host response for tuberculosis.... i have the symptoms but I need help with what the host response are.... Thanks
  75. biology

    At what stages of meiosis 1 and 2 are the chromosomes unreplicated and replicated At what stages of meiosis 1 and 2 are the chromosomes diploid and haploid
  76. Biology

    what are the radiometric dates of: Homo sapiens, stone tools, sabre toothed cat, wolly mammoth, apes, whales, horses, dinosaursflowering plants, birds, earthworms, reptiles, spiders, sharks, amphibians, land plants, jawless fish, jellyfish bacteria and photosynthetic organisms?
  77. biology

    I have 2 problems/questions I am unsure of the answers. 1. how would you demonstrate the Valsalve maneuver using the model lung? 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the same, increase or decrease? Thank you for any...
  78. Finite Math

    A biology quiz consists of 10 multiple -choice questions. 7 must be answered correctly to receive a passing grade. If each question has 4 possible answers, of which only one is correct, what is the probability that a student who guesses at random on each question will pass the...
  79. earth (or Biology?)

    You collect some pond water and filter out the different organisms into separate jars. You add no food to the water, but one kind of organism is still alive long after the others have died. That species is best described as being _________.
  80. Science - Mercury

    So I'm in the middle of working on a science portfolio and it says: How will you overcome these challenges with the design of your spacecraft? you see I'm planning my own mission to space and I'm traveling to mercury, but I don't know how my spacecraft should overcome the ...
  81. 6th grade science project

    My 1st science project and we have something to turn in each week from now till the science fair. this week it is the variables. Project from science buddies. I am doing-Ocean Currents: modeling the 'Global Conveyer Belt' in your Kitchen. Am I correct in my experimental design...
  82. GED

    Is the English Writing test the most difficult GED test? I find Math easy. Am I required to memorize the Science and Social Studies? or will I be provided information and is the Science and Social Studies actually a reading test? Thank You in Advance.
  83. Biology/ms. sue

    ms. sue help =-(
  84. Biology

    Describe two practical applications for being able to extract DNA from cells. Genetically engineering insulin producing bacteria Crime lab testing of blood (white cells have DNA) and semen what are some biome characteristics for a freshwater wetland
  85. Biology

    Ok i have three questions that i can't find anywhere... 1. Carbon dioxide and water are excreted here during exhalation. 2. Structures in the skin which excrete water. salts, and some urea. 3. Removes toxic substances from the blood and converts excess amino acids to urea. ...
  86. Biology

    Hi, I tested the three most sensitive areas of my body and it was the fingertip, the tounge and the lower lip, and the question asks me "why do you think it is so?" I researched everywhere but cant find the answer probably because there are different sensitive areas other ...
  87. biology

    Which of the following words or phrases describes the heterotrophic bacteria, the cyanobacteria, both or neither? a.lack of nuclear envelope b.photosynthesize similarly to green plants c.possess a cell wall d.eukaryotic cells e.symbiotic relationships f.saprobes I know that d-...
  88. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton d. hydrostatic skeleton, bilateral symmetry, ...
  89. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton d. hydrostatic skeleton, bilateral symmetry, ...
  90. biology

    You are gardening and accidentally puncture your arm with a nail that was in the soil. No significant occurred but your arm was swollen. Recall that soil contains many microorganisms that could be pathogenic. Describe in detail the nonspecific and specific mechanisms that ...
  91. biology

    find an instance of an ecological “mess” that has taken place in your city/county/region. Outline the history of the problem – what caused it? What is being done to resolve the problem? Suppose that you had been in charge of the situation. What might you have done ...
  92. biology

    please help me with these to questions! The trait that viruses share with living things is the ability to a. adapt. b. use food. c. respond. d. reproduce. and Some viruses cause the host cell to reproduce both itself and the virus. Groups of these cells become a. polio. b. ...
  93. Biology-Ecology

    Multiple choice: For a natural ecosystem to be self-sustaining, many compounds must be: 1. converted into new forms of energy. 2. cycled between organisms and the environment. 3. permanently removed from the environment. 4. changed into fossil fuels such as oil and coal
  94. biology

    After a family picnic, Ella dumped the ice and rock salt from the ice cream maker in the back yard. That area of yard now contains dead, brown grass. Explain why this happened, and use the words hypotonic, hypertonic, and plasmolysis in your explanation
  95. Biology

    Hormones are _____? a) produced only in response to environmental stress b) are all under the control of the pituitary gland c) signals that must interact with DNA in order to be effective d) always proteins I feel like it is b) because hormone receptors are always proteins, ...
  96. Biology

    Hormones are _____? a) produced only in response to environmental stress b) are all under the control of the pituitary gland c) signals that must interact with DNA in order to be effective d) always proteins I feel like it is b) because hormone receptors are always proteins, ...
  97. biology

    suppose some natral disaster occured and a speices of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with many fewer cacti but an over abundance of orchids what would be the imediate consequences to the speices in ...
  98. Biology

    Evolution by artificial selection is a common way by which people breed plants and animals to have characteristics that we find desirable. Imagine that you are working in a lab where scientists are trying to breed a strain of apple that has much higher sugar content. How might...
  99. Biology

    How are proteins, lipids, and polysaccharides similar? A) They contain the same atoms are types of bonds between atoms. B) They are natural polymers composed of repeating monomeric units. C) They are formed during exergonic metabolic reactions in a cell. D) They have ...
  100. Biology Lab gr 12

    hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab with sand, and it is with a ...
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