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While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow).
Which characteristic should permit the class to conclude that it is probably not a snake?A) the number of eyesB) its presence in a burrowC) the absence of scales on its surfaceD) the size and condition of its eyesE) its length
Which is characteristic of all mammals, and only of mammals?A) using the rib cage to assist in ventilating the lungsB) a four-chambered heart that prevents mixing of oxygenated and deoxygenated bloodC) giving birth to live young (viviparous)D) having glands to produce nourishing mild for offspringE) parental care of offspring
Given a stock solution of 10mM, how many milliliters would you add to water to have a concentration of 5 uM (micro molar) in a final volume to 2 ml.
Assume that you have a stock solution of epinephrine at a concentration of 1mg/ml. Further assume that there are 20 drops/ml.
The protostome developmental sequence arose just once in evolutionary history, resulting in two main subgroups-Lophotrochozoa and Ecdysozoa. What does this finding suggest?
discuss the importance of the proof-reading function of the bacterial replication DNA polymerase.
Authors found that molecular data often finds cryptic species that are not detected through morphology. Should morphological data be rejected in lieu of molecular data? Explain.
What is the advantage of using ATP as a common energy source? Another way of asking this question is, Why is ATP an advantage over using a bunch of different food molecules?
what would be the f2 phenotypes and frequencies?
Discuss similarities and differences Rickettsia rickettsii and Chlamydia trachomatis with respect to structure, disease transmission, and pathogenesis.
A quorum sensing response in a hypothetical organism results in upregulation of one gene and downregulation of another. Suppose that preliminary experiments have been performed and these experiments have shown that homoserine lactone functions as the..
Using a five step protocol, you have purified an enzyme to the point where the specific activity remains constant when you perform any additional purification steps.
You are boiling water on the stove and reach over to turn the burner off. In doing so, your arm brushes against the hot kettle and your skin gets burned. You feel the pain and pull your arm back with a loud exclamation. what parts of the brain and..
Most flour beetles are black, but several color variants are known. Crosses of pure-breeding parents created the following results in the F1 generation.
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