What is the appropriate order of the stages of investigating whether maple trees drop their leaves in the autumn because of colder days?
(1) Maple trees are grown in two greenhouses where the only variable is temperature (15?C vs. 10?C).
(2) The hypothesis is rejected.
(3) There is no statistical difference in the number of leaves dropped at 10?C as compared to 15?C.
(4) The observation is that maple trees drop their leaves in autumn.
(5) The hypothesis is that maple trees drop their leaves because of colder temperatures.
A. 1, 2, 3, 4, 5.
B. 3, 4, 5, 1, 2.
C. 5, 4, 3, 1, 2.
D. 4, 5, 1, 3, 2.
E. 3, 4, 2, 1, 5.
D. 4, 5, 1, 3, 2.
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Explain the difference between primary and secondary growth
What will be an ideal response?
When an outgrowth forms on the tubular body of a hydra and eventually separates and grows into adulthood, this is an example of
a. budding. b. fission. c. organogenesis. d. parthenogenesis.
The correct functions of your lungs contribute to the normal pH level of between 7.35 and 7.45. If your lungs do not exchange and remove carbon dioxide from your blood, the blood pH will change. A pH 6.4 reading of your blood indicates
A. a health problem due to the pH value being 10X higher OH- concentrations than normal in your body.
B. a health problem due to the pH value being 2X higher OH- concentrations than normal in your body.
C. a health problem due to the pH value being 2X higher H+ concentrations than normal in your body.
D. no health risk, as part of normal pH changes in your body that in this case bring it closer to neutral pH.
E. a health problem due to the pH value being 10X higher H+ concentrations than normal in your body.
PBDEs have not been linked directly to cancer in test animals
a. True b. False