The present range of the sugar maple in North America extends from the Atlantic Ocean west to the Mississippi River and from southern Ontario, Quebec, and New Brunswick south to Tennessee and Virginia
If the global temperature rises 10°C in the future, where will the range of sugar maples be found?
A) Farther west
B) Farther south
C) Farther north
D) In the same place; global warming will not affect the heat tolerance of plants.
E) Nowhere; sugar maples will become extinct.
C
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What is the ?2 value for a chi-square test for goodness of fit of the null hypothesis?
In Drosophila, singed bristles (sn) and carnation eyes (car) are both caused by recessive X-linked alleles. The wild-type alleles (sn+ and car+) are responsible for straight bristles and red eyes, respectively. A sn car female is mated to a sn+car+ male and the F1 progeny are interbred. The F2 are distributed as follows:
A) 0.5
B) 1.0
C) 2.0
D) 0.4
E) 20
Refer to Figure 50-4. Which of the following statements concerning the corpus luteum is false?
a. It is responsible for the second peak in the line labeled 1. b. It is responsible for the second peak in the line labeled 2. c. It is responsible for the first peak in the line labeled 1. d. It develops from the empty follicle following ovulation. e. It is most active between days 18 to 26.
Yeast is used to make bread rise by producing ___ during fermentation.
Fill in the blank(s) with the appropriate word(s).
Which of the following organisms is BSL-2?
A) Staphylococcus aureus B) Lactococcus lactis C) Staphylococcus epidermidis D) Escherichia coli E) Klebsiella aerogenes F) Pseudomonas fluorescens G) None of these