science, biology

41,099 results, page 68
  1. Science (please help me)

    I have 2 question on science 7. please help me. 1.state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom. a)green relish b)soda pop in a glass c)bubble tea d)traditional Aborigial paint made of red
  2. Biology

    If water were not a polar molecule and could not form hydrogen bonds, how would this change the structure and density of ice? Why would change? How would this affect the organisms living in lakes and ponds? 1. It would be heavier than water and sink. 2. If
  3. 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
  4. Calculating Chi Squared

    I did a biology experiment and I have to use the chi^2 method to calculate statistical significance. I got data at different time points and I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the
  5. Science

    For my science class I have to make a machine that attempts to convert heat energy into work. I'm not really sure how to do this, but I do have some ideas, however I'm not all the way there. If you told me your opinion of my ideas or if you gave me one of
  6. biology

    Help required, Gametes are produced in the process of meiosis. In humans, one pair of autosmes (chromosome 4) has a short arm and a long arm. On the short arm is a gene for Huntington disease (H) and on the long arm is a gene for red hair(R). Draw a
  7. Biology

    J.J. Thomson's experiments supported the existence of a particle that deflected away from a negative charge and toward a positive charge. Ernest Rutherford found that when positive particles were fired at gold foil, some of the particles deflected rather
  8. science(2 Qs)

    PLEASE ANSWER MY 2 QUESTIONS IN SCIENCE THANKS 3.when a negatively charged object moves in the opposite direction of an electric force field,the potential energy of the object. A.becomes zero(I PICK THIS) B.increases C.decreases D.stays the same 4.the two
  9. Maths literacy,life science,history,geography

    I PASSED MATRIC ND I WAS DOING THESE SUBJECTS..I PASSED WITH DIPLOMA.....THIS WAS HOW I WORKED.....#MATHS LITERACY (LEVEL 3) #GEOGRAPHY(LEVEL 3) #HOME LANGUAGE(LEVEL 7) #ENGLISH(LEVEL6) #LO(LEVEL7) #LIFE SCIENCE(LEVEL3)#....I WANT TO KNW WHAT CAN I STUDY
  10. biology

    need help few questions 1. a signaling cell produces a signal that is detected by what type of cell? 2. If the interior of a typical cell is negatively charged, what type of charged ions will not require energy to diffuse into the cell using an ion
  11. chemistry

    A biology experiment requires the preparation of a water bath at 37.0°C (body temperature). The temperature of the cold tap water is 22.0°C, and the temperature of the hot tap water is 55.0°C. If a student starts with 70.0 g of cold water, what mass of
  12. biology - temp on enzymes

    I have a practice question and I need some help on it because I am rather confused! 'Investigation into the effect of temperature on enzyme activity' -Casein is an insoluble milk protein found in powdered milks -Casein forms a whits suspension which clears
  13. biology - confirmation of true / false answers

    1) A product of yeast fermentation is LACTIC ACID. False 2) To begin glycolysis, FOUR ATP molecules are needed. False 3) Anaerobic respiration takes place in the CYTOSOL. True 4) Glucose enters the cell by FACILITATED DIFFUSION. True 5) If an animal cell
  14. numerical & proportional reasoning

    students in a biology class measured and recorded the lengths of different microscopic organisms. the results are recorded below. organism lenght(millimeters) a 0.00065 b 4.72* 10(exponent -4) c 8/10,000 d ?? a- a fourth organism was measured and found to
  15. This is grade 12 biology

    What is the effect of enzyme concentration on enzyme activity? Explain how much enzyme activity changes as enzyme concentration decreases, and discuss why this occurs (on a molecular level). Is this right (and can you add more): As enzyme concentration
  16. college algebra

    23. In biology, the function defined by g(x)=5x/2+x gives the growth rate of a population for x units of available food. (Source: Smith, J. Maynard, Models in Ecology, Cambridge University Press.) (a) What amount of food (in appropriate units) would
  17. biology

    Research the sea lamprey, an exotic species that has had a great impact on the fish communities of the Great Lakes. a) Describe the niche of the sea lamprey. b) Find out how sea lampreys may have entered the Great Lakes ecosystem. c) Identify the
  18. biology

    A cross between two pea plants with axial flowers and inflated pods gives the following offspringg: 20 with axial flowers and inflated pods, 7 with axial flowers and constricted pods, and 5 with terminal flowers and inflated pods. What is the most probable
  19. Biology

    Fats are excellent energy storage molecules because a) they have a relatively high ratio of energy storing C—H bonds. b)they have a relatively high ratio of energy storing C=O bonds. c)they are hydrophobic and do not easily mix with water. d)they have a
  20. Science

    Can a recessive trait be a dominant trait as well? I ask this because I have a science problem that says this: A Bb guinea pig crosses with a Bb guinea pig, and four offspring are produced. All the offspring are black. Explain how this could happen. I
  21. AP Biology

    My F1 generation gave me 30 males (5 were mutated) and 10 females 5 were mutated. My F2 generation gave me 50 males, 20 were mutated, and 30 females, 15 were mutated. I don’t know how to determine my crosses identifying if its sex linked or autosomal and
  22. biology

    Would you like to help me answers some of my questions in Biology? 1/ Darwin concluded that the most well adapted individuals in a population will leave the most offspring for future generations. This can be considered a measure of an individual's.. a/
  23. Biology

    Need help with these--- 14. Which of the following is present in an insect but not in arachnids? a. mandibles b. compound eyes c. jointed appendages d. segmentation 16. The exoskeleton of an insect a. does not have any muscles attached to it b. is moved by
  24. Biology

    Need help with these--- 14. Which of the following is present in an insect but not in arachnids? a. mandibles b. compound eyes c. jointed appendages d. segmentation 16. The exoskeleton of an insect a. does not have any muscles attached to it b. is moved by
  25. Biology!!

    If i do a starch test on a plant cell that comes from a plant exposed to sunlight, which parts of the plant cell will be stained blueblack? 1. nucleus 2. cell wall 3. cytoplasm 4. vacuole I wrote the answer as 4, the vacuole, but the correct answer says 3,
  26. Biology for school

    What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain on a molecular basis. I am not sure what the question wants from me. Would this be right, and is there anything
  27. Biology

    All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from
  28. Biology

    All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from
  29. Biology

    Why do elderly people experience cold intolerance when they in fact have increased adipose tissue and more lipid storing area? I mean I know temperatures of the body is regulated by the hypothalamus along with the thyroid and all .. but what i always
  30. Biology (Answer Check)

    State how comparing the amino acid sequence of a protein can provide evident that evolution has taken place. A: If evolution has taken place, then, in general, species descended from a recent common ancestor should have fewer amino acid differences between
  31. Biology!!

    1. what's a huge difference between the chemical equations for Respiration and Alcoholic fermentation &... What determines whether a facultative organism will go through respiration or fermentation *For the first part of the Question, (I looked it up but I
  32. Biology

    Which of the following statements about sexual and asexual reproduction is FALSE? A)Genetic diversity occurs in sexual reproduction. B)Asexually reproducing organisms can repair their own DNA. C)There are no special reproductive cells in asexual
  33. Biology

    Pick the correct answer, and explain why it is correct. If the pressure in the thoracic cavity increases and the pressure in the ventricles due to venous return remains the same, A. Stroke volume will decrease B. heart rate will decrease C. Cardiac output
  34. Biology

    Using a special balloon that is permeable to water but not sucrose to make an "artificial" cell. The balloon is filled with a solution of 20% sucrose and 80% water and is immersed in a beaker containing a solution of 40% sucrose and 60% water. The solution
  35. biology

    which of the following types of cells need to make energy to perform basic functions like growing, moving, and reproducing? -animal cells -animal cells and bacteria cells -animal cells, bacteria cells, and plant cells -plant cells
  36. Biology

    1. Objects viewed from the left fall on which side of the eyes retina? 2. From the retina following the optic nerve to the appropriate area of the brain for interpretation, for example A. Which side of the brain interprets objects viewed from the left
  37. Science

    Jordan is doing a science fair project on the effects of music and growth of tomatoes.he has two tomato plants, plant A and plant B that he grows in a window and gives the same amount of water. Plant A is exposed to classical music using headphones
  38. algebra

    students in a biology class just took a final exam. a formula for predicting the average exam grade on a similar test t months later is. s(t)=78-15log(t+1) (a)find the students average score when they first took the final exam. (b)what would be the
  39. Biology

    Describe the relationship between the respiratory and the cardiovascular systems! Doesnt the respiratory feed the cardiovascular with oxygen, and getting rid of CO2 and water? Doesnt the cardiovascular system feed the respiratory system with a fluid for
  40. Please Help Biology Question

    Pick the correct answer to the following question. Write a brief statement explaining why each choice of answers is correct or incorrect. In diabetes mellitus, because of insufficient insulin production, glucose cannot enter cells. instead it accumulates
  41. biology

    Both of Susie’s parents died from breast cancer. Susie tested positive for the BRCA1 gene, the BRCA2 gene, and HPV; however, she does not have any cancer cells in her body or any signs or symptoms. Susie just called you and told you that she has decided
  42. Biology

    what volume of air might you exchange in a minute?a)while resting b) during exercise http://www.arb.ca.gov/research/resnotes/notes/94-11.htm
  43. 7th Grade Science Help Please

    For his science project, Austin wants to determine if the pH of standing rainwater and places it indoors in a spot that does not receive a lot of sunlight to limit evaporation. Using a pH testing kit, he measures the pH of the water once a day for 20 days.
  44. Biology

    One family of mammals includes true horses (Equus), zebras (Hippotrigris and Dolichohippus), and donkeys and asses (Asinus). Zebroids are hybrid offspring of wild zebras and domesticated horses that were confined to the same pasture. The unnatural
  45. Honors Biology

    The inability of defensin to function in high-salt environments is at least partly responsible for the pathology of this disease. Imagine that you are the director of a biotech company that specializes in manufacturing human proteins by producing them in
  46. Honors Biology

    The inability of defensin to function in high-salt environments is at least partly responsible for the pathology of this disease. Imagine that you are the director of a biotech company that specializes in manufacturing human proteins by producing them in
  47. science fair

    Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and
  48. English

    Writeacher, thank you very much for all your explanations!! I think the part of the integration of the project into the students' curriculum should be improved. This is what I translated. I think certain points should be omitted. I also wanted to add a new
  49. biology

    Given that the caloric expenditure is about 10 kcal/ 1 lb. * day. How would you find the ATP expenditure/day. Is it possible to calculate the amout of ATP used per day given only the caloric expenditure?
  50. Chemsitry

    What is the purpose of cell matching? (1 mark) I've been researching for quite a long time now. This question relates to using spectrometry. Can anyone help me? Thanks! I let this question go yesterday because I connected it with cells is biology. On
  51. Biology

    In many tissues, one of the earliest responses to cellular injury is the rapid increase in the levels of the enzymes involved in the pentose phosphate pathway. Ten days after an injury, heart tissue has levels of glucose-6-phosphate dehydrogenase and
  52. Biology

    Hi guys, need help with homework...got some done, but not sure about these thanks for any help! :) Take a balloon filled with hydrogen gas. Touch a match to the balloon. What happens? Big boom and lots of heat given off. Is ΔH favorable or
  53. Biology

    List 3 differences between eukaryotic and prokaryotic genomes. Describe how one of these differences might impact laboratory applications. What are two issues that might arise when genetically engineering a prokaryotic cell to express a eukaryotic protein.
  54. biology

    31. A student conducts an investigation in which she dissolves 1 gram (g) each of several substances in 50 milliliters (ml) of water. She has 12 identical plastic cups of water. She places 1 g of salt in three cups, 1 g of sugar in three cups, and 1 g of
  55. Biology

    Which onf of the following statments about sense resceptors is trus? A) Chemicals, light and pressure convert stimuli into electrical impluses. B) Electrical impluses within the nerve pathways trigger an awareness of stimuli in the sensory receptors. c)
  56. Biology

    Genetic engineering is the manipulation of genes using cloning and transformation to change the gene structure. Genetic engineering has many positive outcomes. For example, A) gene therapy might cure one defect while creating another. B) genetic
  57. Biology

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

    Check the grammar and spelling Our project will make more heat than other projects because we have tin foil that reflect the heat and the shiny side of the tin foil keeps it warmer. We have a very soft blanket that will keep the water warm because its very
  59. Science Sorry I just need help one more time!

    Ok I am doing a project in science on radiation. I have to make a brochure. I need help answering these questions about radiation. Or some good sites would be nice too. I looked on google but they didn't really help. Thank you! Where does radiation come
  60. Science

    I'm currently studying for a science test and I need help on one of the question. - What is a tsunami and how is it related to an earthquake? For the part " What is a tsunami, my answer would be Tsunamis are giant waves caused by earthquakes or volcanic
  61. English

    I just wanted to know which alternatives are better. Thank you very much for your help. 1)I hate doing shopping OR the shopping”?). 2) I do some football OR I play football). 3) I like reading war and car books OR war books and car magazines (?) and
  62. Biology

    Following my previous question: jiskha/display.cgi?id=1200944514 use the Galapagos Islands as an example try to produce an action plan of at least 5 points that could reduce the risk of manmade extinctions occurring in vulnerable habitats. Give a brief
  63. Science....

    Look at my previous post.... Can anyone please answer my science question??? well what's the question? http://www.sinauer.com/cooper/4e/chapter10.html Well, did u look at my previous post??? Hey Lance!! Thanx sooo much!! I got the problem right! I owe u
  64. Biology

    A wolf needs to eat three rabbits a day to survive. A rabbit needs to eat 15 berries a day to survive. How many berries are needed to support a wolf for a day?
  65. Biology

    Q1. What enzyme could you use to break down the major chemical in the cell wall? A: EDTA but it's not an enzyme Q2. What chemical would you use to break down the major chemical in the cell membrane? A: something like lipases? Please help!!
  66. biology

    The hypothalamus secretes a hormone called GnRH that makes the anterior pituitary gland release FSH, referred to as (A)__________ hormone, and LH, or luteinizing hormone. As the levels of these two hormones increase, the oocyte and layer of cells that
  67. Biology

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

    If plants are grown for several days in an atmosphere containing 14CO2 in place of 12CO2, one would expect to find: very little radioactivity in the growing leaves large amounts of radioactive water released from the stomates a large increase in 14C in the
  69. science

    I boiled eggs in organce and apple juice to see if the eggs would boil. The eggs boiled. I didn't think the eggs would boil because of the acidity in the orange and apple juice. I got B- on my sciene project. My science teacher wants for me to improve my
  70. math-5

    Which choice is the answer? Show me please. 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.
  71. Language Arts

    7) While I was researching skate boards, 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 scientists in San Francisco, California filmed skateboarders in action. 10)
  72. College Biology

    The RBC osmolarity of a patient is 300 mOsm/L and is given 1L of distilled water and starts with 3L of plasma. What is the plasma osmolarity after infusion mixes with plasma but before water enters her RBC? Once infused water equilibrated between plasma
  73. Biology

    The original high estimate of the number of protein-coding genes in humans was based partly on the number of different known proteins made by the human organism. How can the small number of genes now thought to be present account for this larger number of
  74. biology

    In a laboratory population of diploid, sexually reproducing organisms a certain trait is determined by a single autosomal gene and is expressed as two phenotypes. A new population was created by crossing 102 pure–breeding (homozygous) dominant
  75. ap biology

    we are looking at the Hardy weinberg equilibrium theory and we were given fifty problems to work over the break and even though i have answered most of them there is one that has be taken a long time because I am not sure if it can be solved. here is the
  76. 12th grade Biology

    Consider the following animals: Earthworm Flatworm. Frog. Jellyfish. Lamprey. Tuna. Create a table of fundamental traits for these six animals as a basis for building a cladogram. Use traits that are either present or absent in a given organism. Use the
  77. language arts Ms. Sue please

    5. Which of the following sentences is punctuated correctly? (1 point) I'd like to go outside but I need to finish my homework first. Since Bobby's birthday is in July he isn't able to celebrate with his classmates. Even if I have to do it myself I will
  78. Biology

    Darwin was able to formulate his theory of evolution based on several facts. Which of the following facts was unavailable to Darwin in the mid-nineteenth century? Natural resources are limited. Individual organisms in a population are not alike.
  79. Biology (genetics)

    The RAS protein acquires a mutation that prevents release of GTP. Which of the following characteristics are these cells likely to acquire? a)Self-sufficiency in growth signals b) insensitivity to anti growth signals c) angiogenesis d) metastasis e)
  80. biology

    Can someone help? I don't understand gene regulation. The regulation of protein synthesis in cells involves the coordination of several different mechanisms. Discuss TWO of the specific mechanisms of gene regulation in eukaryotic cells from the list below
  81. Biology

    Theme A: Surface anatomy of the brain Of the following pairs of directional terms, which pair contains terms that define PERPENDICULAR (orthogonal) directions when applied to the identified region of the central nervous system? in the brainstem, ventral &
  82. statistics

    Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better
  83. Biology

    Does it matter which strand is the 'code strand'? The following two sequences look identical, except one runs 3'-5' and the other 5'-3'. For each DNA sequence given below, write the mRNA sequence that would be coded from it. Make sure you indicate the
  84. physical science

    Please check my answers on this physical science quiz, thanks 1. in which of the following scenarios are action and reaction forces involved? a. when a tennis racket hits a ball b. when you step from a curb c. when you row a boat d. all of the above** 2.
  85. Biology

    Select the correct statement describing feedback control in animals. Select the correct statement describing feedback control in animals. a) All ectotherms are conformers with respect to temperature. b) An animal may be a regulator for one environmental
  86. biology

    6. A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000
  87. Biology

    A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000
  88. Biology/ a&p

    Which of the following parts of the circulatory system carries oxygenated blood? A. An artery moving blood from the heart to the lungs B. A vein moving blood to the heart from the body C. An artery moving blood from the heart to a muscle cell D. A venule
  89. Biology

    . Which of the following parts of the circulatory system carries oxygenated blood? A An artery moving blood from the heart to the lungs B. A vein moving blood to the heart from the body C. An artery moving blood from the heart to a muscle cell D. A venule
  90. Biology

    Where is the Barnacle zone located in a rock platform ecosystem(Upper littoral, upper mid-littoral, lower mid-littoral or lower littoral zone)?
  91. Biology

    Dominant - an organism with the dominant allele For a trait _________? Answer: that produces the same phenotype Recessive - an organism with the recessive Allele for a trait will __________? Answer : ?
  92. Biology

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

    there are 28 students,all of whom study either science,language or both,18 students study language and 14 study science.How many students study science and language?
  94. Biology

    Which statement is NOT true about the proteins in the plasma membrane? -Proteins may be attached to the inner surface of the plasma membrane. -The hydrophobic portion of a protein is embedded within the membrane. -Some peripheral proteins are connected to
  95. Biology! pleaseee helppp

    About 70% of the human population can taste the bitter chemical phenylthiocarbamide (PTC), which is found in foods like broccoli. The allele, T, for tasting PTC is dominant over the allele, t, for not tasting it. Calculate the allele frequencies using the
  96. Science

    I have a science question Unless you actually ask the question, we cannot help you. Please repost with your question.
  97. material science

    What is the different between material science and material engineering?
  98. Science Fair

    I'm planning on doing a science fair project, but it has to involve an experimen. I wanted to do it on how adding mayonnaise, ketchup, and mustard to a small hamburger at McDonalds can so much fat to it that it can make it as bad as a big hamburger without
  99. Biology

    Tube # 1: 1 ml of water, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Tube # 2: 1 ml of Ph 7 buffer, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Both of these reactions tested positive, and the same enzyme was used for both tubes. Why Did you get
  100. human biology

    A 56 year old obese male is rushed to the ER via ambulance. The EMS team reports he was found non- responsive and in shock. Additionally, they note he has a stiff rigid abdomen and can feel a large lump near the midline. Upon questioning, his wife