If you were analyzing tree rings, how might you distinguish between fires that occurred in the spring versus fires that occurred in the summer (assuming the fires left fire scars)?
What will be an ideal response?
ANSWER: A spring fire would damage “spring wood” and a summer would damage “summer wood”.
These portions of an annual tree ring are distinguished by either being a light band (spring
wood), or a dark band (summer wood).
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Which protein is lethal to humans in a very small amount?
a. Actin b. Salt c. Ricin d. Troponin e. Myosin
What is the association between tropomyosin and troponin molecules in resting striated muscle fibers?
A. Tropomyosin holds the troponin in place on the actin. B. There is no known association. C. Troponin holds the tropomyosin in place on the actin. D. Troponin holds the tropomyosin in place on the myosin. E. Tropomyosin holds the troponin in place on the myosin.
The relatively shallow part of the ocean extending from the low tide mark to the edge of the continental shelf is called the
A. littoral zone. B. limnetic zone. C. neritic zone. D. surface zone. E. abyssal zone.
Eukaryotic somatic cells alternate in a cycle between cell division and other cell activities. The cell division portion of the cycle is called:
A) the mitotic phase. B) the meiotic phase. C) interphase. D) DNA synthesis. E) Gap phase.