You are a paleontologist studying the fossil marine fauna immediately after the K–T mass extinction. You find ammonite fossils in the post–K–T layer even though ammonites are known to have vanished in the K–T ex-tinction
You submit your sensational findings to a journal, but one of the reviewers questions your claim of ammonite survival. He points to the fact that your ammonite fossil was found in rock that shows extensive burrowing activity by benthic organisms. Why does the reviewer question your conclusion?
What will be an ideal response?
ANS:
The unusual location could be the result of "forward smearing." The burrowing activity may have moved the ammonite shell from an older into a younger geologic layer.
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Rosalind Franklin did not share a part of the 1962 Nobel Prize for Medicine or Physiology because she had died four years earlier
a. True b. False Indicate whether the statement is true or false
The complete replacement of one type of organ with another is called ____
a. paedomorphosis b. heterochrony c. homeosis d. homoplasy e. allometry
Which of the following is false regarding the
properties of sound? a. The amplitude of a sound corresponds to loudness. b. The frequency of a sound is the number of wave cycles per second. c. Every ten-decibel increase in loudness represents a tenfold increase in intensity. d. A soft sound has a greater amplitude than a loud sound. e. A high note and a low note with the same amplitude are equally loud.
Which scenario describes an interaction between the system responsible for nutrient absorption and the system responsible for fighting illness?
a) food molecules are broken down at a faster rate to increase an organism's body temperature b) hormones travel through the blood to alert cells to absorb glucose c) the stomach responds to signs of a pathogen by forcing its contents back through the esophagus d) all of the other answer choices