science, biology

41,099 results, page 69
  1. Biology

    A cross between true breeding tall red flowered plants and true breeding short white flowered plants. Tall and red are dominant traits. What would be the expected ratios of phenotypes in the f1 and f2 generations? what is the exoected ohenityouc ratui if
  2. biology

    Food that is consumed often enters the body in the form of large organic molecules, such as proteins and starches. Prior to entering cells, however, these large molecules must be broken down into smaller molecules. For example, proteins are digested into
  3. AED

    CheckPoint: Multiple Intelligence Theory • Due Date: Day 4 [Individual] forum • Choose a topic (such as history or science) that you feel is relevant to the age group you work with or expect to work with. • Describe in 200 to 300 words how you can
  4. Biology 12

    The question is asking to calculate the overall energy change in the combustion of ethane (C2H6). This is what I have done: The balanced equation: C2H6 + 6 O2 --> 2 CO2 + 3 H2O (6) 411 + 346 + (6) 494 --> (2) 799 + (3) 459 2466 + 346 + 2964 -->
  5. Biology

    Which of the following is correctly matched with its tissue system? cortex/dermal tissue system cuticle/vascular tissue system phloem/dermal tissue system stele/vascular tissue system>>>> my choosen answer
  6. Biology

    1. In females the first meiotic cell division produces____cells. 2. One of the cells is ___ than the other and is called ______. 3. The polar body stays attached to the ____. 4. The larger cell is called the _____ and it mature into _____. 5. The second
  7. Biology (CHECK)

    Describe how comparing the anatomy of living species provides evidence of evolution. A: Comparisons of the anatomy of different types of organisms often reveal basic similarities in body structures even though the structure's functions may differ between
  8. science

    Hello! I need help with some Science things. 1. Where is a good place to find a picture that describes radioactive decay, fussion and fission/ 4. Scientists use the amount of radioactive isotopes found in rocks and fossils to calculate their ages. This
  9. Biology-Is my answer correct

    Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right? A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the
  10. BIOLOGY

    In angiosperms, pollen grains are A. diploid and are made when haploid gametes join in fertilization B. diploid and are made when haploid gametophytes join in pollination C. Haploid and are made when haploid spores undergo mitosis D. haploid and are made
  11. Biology

    In drosophila , short wings , and black colour are reccessive traits.long wings and grey colour are dominant. show the cross results between a short winged , heterozygous grey fly and a heterzygous long winged grey fly
  12. pHYSICS

    A BALL IS THROWN STRIAGHT UPWARD AND RETURMS TO THE THROWER'S HAND AFTER 3 SECONDS IN THE AIR. A SECOND BALL IS THROWN AT AN ANGLE OF 30 DEGREES WITH THE HORIZONTAL. AT WHAT SPEED MUST THE 2ND BALL BE THROWN SO THAT IT REACHES THE SAME HIEGHT AS THE ONE
  13. math fraction

    10 out of 36 students love math, 13 love science and the rest love english. write down the fraction of students who love science.
  14. Geography and Society

    What is cartography? a. the study of maps b. the science of creating maps*** c. the science of creating scale for maps d. the study of scale maps
  15. biology/cells

    what cells can make energy from sugar molecules? -only plant and animal cells -only animal cells -plant, animal, bacteria, and protist cells -only plant cells
  16. biology

    suppose 23mL of NaOH was required. How much Carbonic Acid was neutralized? 1L of .01 NaOH contains ____ mol NaOH? lmL of .01 NaOH contains _____mol NaOH? 23mL of .01 NaOH contains _____ mol NaOH? 2 mol of NaOH react with 1 mol H2CO3 2.3 x 10^-4 mol of NaOH
  17. Biology

    In goats, the allele for black hair is dominant to that for red. Two black haired goats mated, producing twelve offspring. Of the first eleven, 8 had black hair and 3 had red hair. What is the probability of the twelfth offspring having red hair?
  18. Biology

    Brown eyes in humans are dominant to blue eyes. A brown-eyed man, whose mother was blue-eyed, marries a brown-eyed woman whose father had blue eyes. What is the probability that this couple will have a blue-eyed child?
  19. science(2 QUESTIONS)

    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
  20. Biology

    Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen
  21. earth science

    Science fair help..about soil.. and UV rays..? my topic is how can natural or artificial UV (ultraviolet rays) affect the humus soil and also the grass growing in it? I took 5 plants and put it near the window and the other ones i put it near an artificial
  22. Biology

    Is xylem or phloem larger in a plant? My answer is xylem is larger in a plant than phloem.
  23. Biology: sleep and weigth lost mechanism

    Could some one tell me two mechanism whereby lack of sleep result in increase in body weigth
  24. Biology

    can anyone please explain the term regulating mortality factor (regarding the holly leaf miner )and how understanding of this can lead to successful biological control of pests in agriculture and horticulture hi are you doing s103 im finding this whole
  25. Biology

    Plant -+ Deer --+ Tiger The first step in the energy chain that created the bonds of proteins in the tiger's muscle cells in the food chain shown above is the A. deer the tiger ate. B. plant the deer ate. C. photons the sun made. D. carbohydrates the plant
  26. Biology

    Convert the following DNA sequence into its RNA equivalent and then using the genetic code, convert that RNA sequence into the amino acid sequence. 5’–TACTTCTTCAAGACT-3’ For this above DNA sequence, what information is contained in the
  27. Biology

    in guinea pigs, the allele for a rough coat (R) is dominant over the allele for smooth coat (r). Two guina pigs that are heterozygous for a rough coat, mate and produce offspring. What is the probability that the offspring will have a smooth coat?
  28. Biology

    I have to write 2-4 sentences on these questions. Can I please get some help? 'Both animal and plant cells undergo cytokinesis after mitosis ends. a) How is the process and its outcome same for both animal and plant cells? b)How is the process and its
  29. Biology

    I have to write 2-4 sentences on these questions. Can I please get some help? 'Both animal and plant cells undergo cytokinesis after mitosis ends. a) How is the process and its outcome same for both animal and plant cells? b)How is the process and its
  30. Life Science

    What are advantages of having an exoskeleton? Thank you for using the Jiskha Homework Help Forum. Here are some sites you might like to visit: 1. http://en.wikipedia.org/wiki/Exoskeleton 2. http://science.howstuffworks.com/exoskeleton.htm ADVANTAGES of an
  31. biology

    is my biology paper good so far? Im not done. its about lifestyle disease A lifestyle disease (also called diseases of longevity or diseases of civilization) is an inappropriate relationship between people and their environment that results to having a
  32. biology

    Explain the vascular system of a lilac flower Some sites would help me very much as i cant find any that explain the vascular system of the lilac flower.
  33. biology

    Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by
  34. Biology

    Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by
  35. Math

    A survey of 59 customers was taken at a bookstore regarding the types of books purchased. The survey found 36 customers purchased mysteries, 28 purchased science fiction, 21 purchased romance novels, 15 purchased mysteries and science fiction, 12 purchased
  36. science - pangaea project

    I need help with science pangaea project ideas? my teacher wants a great project, and i really need the grade.? my teacher is expecting an AMAZING project from me, because apparently i'm her best student. anyways, i was thinking that i could show the
  37. Biology

    Which one of the following is not a trace element in the human body? a. fluorine b. nitrogen c. zinc d. manganese e. iodine. The human body contains about 2.6% nitrogen. That is way above the percent in the definition of trace elements See:
  38. SCIENCE!

    i was not taught in my science class any of this, probably a review over 6th grade science, because i learned these in 6th grade.(im in 7th grade now) identifying Errors read the following paragraph and then answer the questions. andrew arrived at school
  39. Biology

    Bio question relating to the respiratory tract? Recent research has shown that cigarette smoke may result in the following: i.)Destruction of the cilia that line parts of the respiratory system ii.) Rupturing the walls of the same alveoli iii.) Thickening
  40. biology

    What are endergonic reactions? How can endergonic reactions proceed in organisms? An endergonic reaction is a chemical reaction where the reactants have a lower free energy than the products. Enderonic reactions are coupled to exergonic reactions which
  41. Biology Help!!!

    Describe the relationship between ATP and ADP and the importance of this relationship within a cell. My answer: ATP stands for Adenosine Tri-Phosphate, and is the energy used by an organism in its daily operations. It consists of an adenosine molecule and
  42. Biology

    I need help making a food web for the following: Forest-field ecosystem, Corn,Decomposers, Deer,Fox,Grass,Mouse, Owl,Rabbit, Seed-eating bird,Snake, Squirrel,Tree I also need help on another one: Saltwater Marsh Ecosystem, Algae, Crustacean, Decomposers,
  43. English

    I urgently need you to check a few sentences 2-4 which I need to include in an email. 1)The universe was conceived in the forms of a chain of being and a cosmic dance. (Can I replace "in the forms of" with "like" or "as"?) 2) As you are both a science and
  44. Pasta cars

    Okay, so my science assignment is to build a pasta car. There is a compitition between all of my teacher's classes, and the other team's science teacher's classes.--losers have to buy the winners a breakfast party. Awards go to the fastest, and the most
  45. elementary

    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
  46. U.S. History (Check, Please!)

    What was the significance of the Soviet Union's launching of Sputnik in 1957? A: The Soviet Unions's launching of Sputnik in 1957 led Congress to create the National Aeronautics and Space Administration (NASA) to coordinate research in rock science and
  47. Biology

    I'm working on a Chromatography Lab and need to identify the pigments that appear on the paper. I've found the names of the green and yellow pigments, but I can't identify a brownish streak that appeared when a paper consisting carnation pigement was
  48. Biology!

    Inorganic fertiliser is applied each year to fields bordering a lake. the fertiliser runs off into the lake and causes six changes which altogether make the fish die. 1. aerobic bacteria feed on dead plants 2. algae reproduce faster 3. light cannot
  49. Biology

    Most frog species have a distinct tadpole life stage. However, microhylids of Australia and New Guinea do not have a tadpole stage, but tadpole features appear and disappear during development in the eggs. This shows that A) microhylids need to be very
  50. biology

    Which of the following is true of skeletal muscle? A. Contraction of skeletal muscle can alter blood flow through the heart. B. Skeletal muscle contraction produces movements of the body. C. Skeletal muscles pump blood throughout the body. D. Flexion of a
  51. Genetics/biology

    Can anyone comment as to wether this solution is correct for this question please !! Draw a mating diagram where L is the dominant gene for the digestion of lactose and shows the crosses between two heterozygotes and wiht the the phenotypic and genotypic
  52. Science

    I have to think of something to do for a science fair project on nutrition. if u have any ideas that would be really cool. You need to think of ideas that interest you. Don't worry about others thinking that the idea is "cool." What nutrition topics
  53. science

    can some explain to me how birth, death and migration rates affect the population? I have read but really do not understand it? the factors that can affect these rates i am assuming is urbanization cost of raising and educating children educational and
  54. Biology

    37. Wings, fins, and arms are limb adaptations that allow mammals to a. live in different environments b. attain diverse sizes c. nurse their young d. communicate with other mammals A? 4. Which is NOT a characteristic of function of the epidermis? a.
  55. Biology

    37. Wings, fins, and arms are limb adaptations that allow mammals to a. live in different environments b. attain diverse sizes c. nurse their young d. communicate with other mammals A? 4. Which is NOT a characteristic of function of the epidermis? a.
  56. Biology

    You need to make 2.5L OF 3M H2SO4. H2SO4 comes as a stock solution in a concentration of 18M. How many ml of stock H2SO4 would you need to make the new solution?
  57. Biology

    to grow larger, arthropods must A grow a new endoskeleton. B grow a new exoskeleton. C add to the old endoskeleton. D add to the old exoskeleton. is it B?
  58. biology

    An individual who is heterozygous for Eye color would be? A.two alleles for brown eyes. B. One allele for brown eyes and one blue eyes. C.two alleles for blue eyes.d.blue eyes I am think b.
  59. Biology

    The Kingdom Monera has been separated into two domains, the Archaea and the Bacteria. Which of the following was most important in prompting scientists to change the way these organisms were classified? a.)Major differences were discovered in the structure
  60. biology

    Assume that a mature female vegetarian consumed 2 pounds of food daily for one year. At the end of this one year, she weighed ½ pound more than she weighed at the beginning of that year. a. What was the percentage of biomass conversion at this trophic
  61. Biology/Chemistry

    During a “perm”, disulfide bonds can be broken and reformed using which treatments, respectively? I think the answer is a. but can someone confirm this? a. an oxidizing agent followed by a reducing agent b. a reducing agent followed by the use of water
  62. Biology

    What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will
  63. biology

    3. A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylinder and the resulting pressure of the air inside the cylinder is measured with a pressure gauge. The results of the experiment are
  64. BIOLOGY please help

    The first phase of somatic cell division is (A) __________, when the cell’s chromosomes condense, and the nuclear envelope that holds the chromosomes starts to break up. During this time, structures called the (B) __________ form from centrioles, which
  65. Biology

    I am supposed to do an essay on compartmentalization of cell respriation but i don't know what it means. my essay is as follows: Compartmentalization is important in carrying out cell respiration. Describe the use of compartmentalization in carrying out
  66. Math

    Practice Dividing by 9 History : 72 Art: 81 Science: 54 Travel: 63 Fiction: 90 Biography: 45 Poetry: 27 Cooking: 36 1/Raul might put an equal number of each kind of book on 9 shelves. How many types of books will have an even number on each shelf? Answer:
  67. biology

    In cat, the gene for black coat is dominant to the gene for white coat. A heterozygous black cat is crossed with a white cat. which of the following is true about the ratio of the offspring from the cross? black coat white coat A 1 3 B 3 1 C 4 1 D 4 0 can
  68. Help Please - Science

    I'm stuck on this thing in science. It's a lab report so its kinda hard to explain. We did a topographic map experiment. We had a big rock, and put it in a plastic bin. We then marked centimeters on the bin and filled water to the first centimeter. We drew
  69. biology

    Hello, I got this question wrong on a homework assignment and I still can't find the correct answer. The reduction of the chromosome number during meiosis is most important for: 1: keeping the amount of DNA in the cell at a minimum level. 2: allowing the
  70. Biology

    In humans, the allele for brown eyes is dominant to the allele for blue eyes. If a man with blue eyes and a woman with brown eyes who is homozygous for eye color have children, what is the probability of having a child with blue eyes? Here are the choices:
  71. biology

    Ionophores are drugs that act as channels in membranes. Each ionophore has its own specificity with regard to the type of ion that will pass through it. The selected ion is able to move across the membrane in either direction, depending only upon the
  72. AED

    this one is hard to me cause I do not know.... Even one of my co worers had a hard time too.. “how students learn science is just as important as what they learn. In the teaching of science, a major objective is to develop students’ problemsolving
  73. Bio

    Hey! I am doing a biology lab in which we take liver and sand and place it in a test tube, to see it if it will react with hydrogen peroxide. One of the test tubes just has sand in it, and no reaction occurs. This is because the sand acts as a control and
  74. 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
  75. Biology

    When dental work is to be done, the gums and nerves in the teeth are anethetized by injection of lidocaine. This drug blocks Na+ channels in the membrane of the sensory cells. This drug is an effective local anesthetic because the A. Sensory cell membrane
  76. Biology

    In general, the frequency of APs in an afferent neuron is related to the amplitude of the receptor potential in the following way: a. exponentially. b. there is no general relationship. c. logarithmically. d. linearly. Is it exponentially? The other
  77. biology

    Could someone please check this definition and tell me if it's good or if it's too much (whatever) Variation=the existence of differences between the individuals in a population. It can be described as continuous or discrete. Examples of discrete variation
  78. biology

    Could someone please check this definition and tell me if it's good or if it's too much (whatever) Variation=the existence of differences between the individuals in a population. It can be described as continuous or discrete. Examples of discrete variation
  79. Science - Please Check My Answers

    Please help me with the following: Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think
  80. biology

    To produce human protein X in bacterial cells, the plasmid (vector) that is chosen should have a _______________ promoter, and the source DNA should be ___________________. Which of the following best completes the sentence above? strong, wild type genomic
  81. Biology

    While performing an experiment, a positive control group is given a treatment that was used one time previously in another experiment. This time, however, the positive control does not give the expected result that you received last time. Which of the
  82. biology

    In guinea pigs, the allele for a rough coat (R) is dominant over the allele for a smooth coat (r). A heterozygous guinae pig (Rr) and a homozygous recessive guinea pig (rr) have a total of nine offspring. The punnett square for this cross shows a 50
  83. biology / CELEISTINE

    describe the genetics of the huntigton disease a. what chromosomes are affected? b. is it a result on translocation/ c. is it a sex-linked? d. does it skip a generation 3. waht are the cause of huntington disaese? how does it occur ? is it preventable ?
  84. algebra 11

    At Joseph Middle School, the probability that a boy takes English and Science is 0.087. The probability that a boy takes English is 0.68. What is the probability that a boy takes Science given that the boy is taking English?
  85. BIOLOGY

    A SALT IS OBTAINED AS A REACTION BETWEEN A SALT (and water) IS OBTAINED AS A REACTION BETWEEN a base and an acid. See: http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/acidbase.html http://lrs.ed.uiuc.edu/students/erlinger/water/background/ph.html I
  86. biology

    Predict the expected change to blood flow should norepi act on arteries of the abdominal cavity? A. Blood flow increases B. Blood flow decreases C. Blood flow stays the same but pressure increases D. Blood flow stays the same but speed decreases E. None of
  87. Biology :)

    Consider the following situation. A cell is in a solution that contains dissolved oxygen. As the cell uses oxygen for respiration, a. oxygen will be carried across the cell membrane by special transport molecules. b. oxygen will naturally diffuse out of
  88. BIOLOGY

    Can TAMIFLU form a hydrogen bond with another molecule? Can TAMIFLU form a ionic bond with another molecule? Can TAMIFLU form a van der Waals forces bond with another molecule?
  89. Math

    A total number of 121 people came to the school science fair this year. This number is 7 MORE than TWICE the number of people who came last year's science fair. How many people came last year?
  90. English

    just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more
  91. Biology IMPORTANT

    what IS prochlorbacteria? do u go to poquoson? if you do is your teacher Mr. LaRue? I do and this project is way to hard. Since this is not my area of expertise, I searched Google under the key words "prochlorobacteria" to get these possible sources: (You
  92. English

    I just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more
  93. Biology

    Male erection is an example of ______. No thought or emotion is required for it to occur, but conscious control can influence it. A) peripheral nerves B) sensory nerves C) a spinal reflex D) A sexual reflex I chose choice A because the book states the
  94. cp biology

    include the following vocabulary when completing the concept map. be sure to PLACE THE WORDS in the correct step of the scientific method, and DISCUSS what occurs at each step. words: qualitative data quantitative data independent variable data analysis/
  95. Biology

    Oxidized (blue) DPIP becomes colorless when it is reduced – that is, when it receives electrons. A diagram of the photosynthetic light reaction shows that water molecules are the source of these electrons. How is it that the DPIP was only able to receive
  96. BIOLOGY( please help me)

    Oxidized (blue) DPIP becomes colorless when it is reduced – that is, when it receives electrons. A diagram of the photosynthetic light reaction shows that water molecules are the source of these electrons. How is it that the DPIP was only able to receive
  97. Genetics/biology Advice

    Can anyone comment as to wether this solution is correct for this question please !! Draw a mating diagram where L is the dominant gene for the digestion of lactose and shows the crosses between two heterozygotes and wiht the the phenotypic and genotypic
  98. Biology

    The modern antibiotic revolution began with the discovery of which antibiotic? sulfanamide quinoline tetracycline penicillin acyclovir Hopanoids found in sedimentary rock are an example of a biosignature. microfossil. stromatolite. banded iron formation.
  99. biology

    I need pictures of molecular structures like Adenine to draw 4 homework search google images using the name of the structures you have to draw...
  100. Science Project Question

    Soooooo, I have a science project where I have to either create a house, OR A car, powered by solar energy, and then answer questions like, Which renewable energy sources did you use What are the advantages of using those energies So, I guess I just dont