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Saturday, April 29

  1. page Global Interdependence edited D 19. Explain how chemical and physical processes cause carbon to cycle through the major earth res…
    D 19. Explain how chemical and physical processes cause carbon to cycle through the major earth reservoirs.
    ...
    through volcanic eruptions,erptions, hot springs,
    ...
    photosynthesis plant
    {carbon_cycle.jpg}
    The Carbon Cycle (don't grade)
    (view changes)

Monday, April 10

  1. page Chemical Structures edited ... D 10. Describe the general structure of the atom, and explain how the properties of the first …
    ...
    D 10. Describe the general structure of the atom, and explain how the properties of the first 20 elements in the Periodic Table are related to their atomic structures.
    An atom consists of a nucleus, which contains charged particles called protons and neutrally charged particles called neutrons. Negatively charged particles called electrons surround the nucleus in different shells. The capacity for each shell is described in the table below. Electrons of higher energy are located in the outside shells.... An atom consists of a nucleus, which contains charged particles called protons and neutrally charged particles called neutrons. Negatively charged particles called electrons surround the nucleus in different shells. The capacity for each shell is described in the table below. Electrons of higher energy are located in the outside shells....
    {http://www.chelationtherapyonline.com/technical/images/b0030.gif} (1)This is an example of a Zinc atom. As you can see there are 30 electrons, with the correct number of electrons in each shell.
    (1)This is an example of a Zinc atom. As you can see there are 30 electrons, with the correct number of electrons in each shell.
    Shell
    (view changes)

Tuesday, April 4

  1. page Chemistry Practice Questions edited D10 1. What charge does an Al ion have if it has only 10 electrons? 2. Which column group of e…
    D10
    1. What charge does an Al ion have if it has only 10 electrons?
    2. Which columngroup of elements
    3. Which element in this group would be the least likely to react with other elements?
    a. Boron
    (view changes)

Wednesday, March 1

  1. page Genetics Practice Questions edited YALL DONT GET IT IN JUHEARDDD vestigial structures, such as hip bones in whales and appendices in…
    YALL DONT GET IT IN JUHEARDDDvestigial structures, such as hip bones in whales and appendices in humans, are those that have little or no function for the organism. what is the most likely reason for this loss of function over time?
    (view changes)

Monday, February 27

  1. page Genetics Practice Questions edited 1.Natural Selection: If there was a species of dogs in a region where the temperature was always a…
    1.Natural Selection: If there was a species of dogs in a region where the temperature was always around 65 degrees F and there were two of dogs, dogs with a heavy coat of hair, and dogs with a light coat of hair. How would natural selection make the dogs evolve if the average temperature lowered to 30 degrees F?
    2. Two farmers plant different varieties of corn on neighboring farms. Farmer Gregor plants genetically modified corn. Farmer Mendel plants a non-modified variety of corn. What would be farmer Mendel's primary concern if she plans to gather seed for next year’s crop?'
    a. loss of genetic variability in the non-modified variety
    b. that mutation rates will increase in the non-modified variety
    c. that insects will only pollinate the genetically modified corn
    d. unintended transfer of modified genes to her crop by cross-pollination
    3.Vestigial structures, such as hip bones in whales and appendixes in humans, are those that have little or no function for the organism. What is the most likely reason for this loss of function over time?
    a. The organism is undergoing speciation.
    b. The organism is experiencing genetic drift.
    c. The structure was over utilized by the organism.
    d. The structure was not highly beneficial to the organism.
    4.Suppose a consumer reads the following news release regarding the safety of a genetically modified (GM) food product.
    GM Grains Pose No Health Risk
    Researchers report that genetically modified (GM) grains fed to test mice have no negative impact on health. In two trials, the offspring of mice fed GM grain for three weeks showed a similar survival rate as the offspring of mice that were fed non-GM grain. The trials have been called as a victory for GM food producers. A spokesperson for the research group stated that “it is highly unlikely for any unintended side effects to occur as a result of human consumption of GM grains.”
    Provide three reasons a consumer should question the conclusions presented in this news release.
    5. Explain how meiosis contributes to the genetic variability of organisms.
    6. Use the Punnet Square technique to predict the distribution of traits in mono- and dihybrid
    crossings.
    7. Describe the difference between genetic disorders and infectious diseases.
    8. A chromosome is best described as a:
    a. gene that has more than one form.
    b. green cell found in many plants.
    c. strand of DNA containing genetic information.
    d. reproductive cell found in certain kinds of bacteria.
    9. Explain how the processes of genetic mutation and natural selection are related to the evolution of species.
    10. Describe how structural and behavioral adaptations increase the chances for organisms.
    11. Describe the factors that affect the carrying capacity of the environment.
    12. Explain how change in population density is affected by emigration, immigration, birth rate and death rate, and relate these factors to the exponential growth of human populations.
    13. Explain how technological advances have affected the size and growth rate of human populations throughout history.
    14. Blight is a plant disease caused by a fungus that affects potato plants. Some wild breeds of potato have natural resistance to the fungus. These wild potatoes contain chemical compounds that cause them to taste bad. Scientists are trying to produce potato plants that are resistant to blight but still produce potatoes that taste good.
    Which of the following describes an important difference between a potato plant cell and a human cell?
    a. Plant cells have a cell wall, and animal cells do not.
    b. Animal cells store water inside, and plant cells do not.
    c. Plant cells have a cell nucleus, and animal cells do not.
    d. Animal cells perform respiration, and plant cells do not.
    15. The development of a blight-resistant potato breed might be good for the environment because the new potato breed will need _.
    f. less water
    g. less fertilizer
    h. less fungicide
    j. less field space
    16. If an intestinal cell in a butterfly contains 24 chromosomes, a butterfly egg cell would contain:
    a. 3 chromosomes.
    b. 6 chromosomes.
    c. 12 chromosomes.
    d. 24 chromosomes.
    17.Which statement about DNA is correct?
    a. A child’s DNA will be unrelated to the mother’s or father’s DNA.
    b. A child’s DNA will show similarities to both the mother’s and father’s DNA.
    c. A female child’s DNA will exactly match the mother’s DNA.
    d. A male child’s DNA will exactly match the father’s DNA.
    18. In fruit flies, gray body color (G) is dominant over black body color (g). What kind of offspring would you expect from parents who are both heterozygous for body color (Gg x Gg)?
    {http://shs.westport.k12.ct.us/mjvl/science/capt/questions/state_released/gene-punnet1.jpg} wpe1.jpg (3046 bytes)
    a. 0% gray, 100% black
    b. 25% gray, 75% black
    c. 75% gray, 25% black
    d. 100% gray, 0% black
    YALL DONT GET IT IN JUHEARDDD
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  2. page Cells & Biotech Answer Key edited creeper pirate1). What type of organism would have this type of cell? Hshshdhhhhhhhhhhhhh kool {…
    creeper pirate1). What type of organism would have this type of cell?
    Hshshdhhhhhhhhhhhhh
    kool {http://wwwa.urv.es/ogovern/consellsocial/PQDocent/CD%20LLibre%20Qualitat/material/cap7/Tema1/prokaryote.gif}
    {http://wwwa.urv.es/ogovern/consellsocial/PQDocent/CD%20LLibre%20Qualitat/material/cap7/Tema1/prokaryote.gif} external image
    A). Animal
    B). Plant
    (view changes)

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