Some types of dinoflagellates (single-cell eukaryotes) show a circadian rhythm. They produce light for about 12 hours in the dark (at night) and photosynthesize for about 12 hours in the light (during the day)
Say you took some dinoflagellates at the end of their 12 hours of
darkness and put them on a 24-hour light cycle. How would the cells likely respond during
the first day of that cycle?
A. The cells would photosynthesize for the full
24 hours.
B. The cells would photosynthesize for more
than 12 hours but less than the full 24 hours.
C. The cells would produce light for the full 24
hours.
D. The cells would not produce light or
photosynthesize.
B
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Which letter(s) in the accompanying figure represents the anther?
a. A b. B c. C d. D e. both C and D
Why is it helpful to think about the moment conditions of a simple linear regression even if OLS yields the same estimates?
A. The moment conditions establish causality whereas OLS just estimates correlation. B. The moment conditions are easier to program in Excel. C. The moment conditions are used directly to produce the slope and intercept. D. The moment conditions will get the smaller standard errors.
A person with a diet very low in iron may not be able to make enough of a formed element in the blood called ________
Fill in the blank(s) with correct word
Could two normal parents have a child with sickle-cell anemia?
a. yes b. no