Which equation describes a parabola that opens up or down and whose vertex is at the point (h, v)? A. x = a(y - v)2 + h B. y = a(x - h)2 + v C. x = a(y - h)2 + v D. y = a(x - v)2 + h

1. What scientific attitudes help generate new ideas?

Joel is comparing two slides showing chromosomes in a sperm cell and a skin cell of a dog. He finds that the sperm cell has 39 chromosomes. How many chromosomes can he expect in the skin cell?

Which statement about sunspots is true? A. Sunspots are seen in the chromosphere. B. Sunspots are related to the Sun's magnetism. C. Sunspots are seen on the hottest part of the Sun. D. Sunspots do not help us determine the Sun's rotational period.

Why are functional MRIs useful to doctors?

Assume that you transform bacteria with a plasmid containing an ampicillin-resistance gene. Instead of directly plating the transformed population as you did in this lab, you set up two liquid cultures of them, one that contains ampicillin and one that does not. You will then assay these cultures on plates at two different times: immediately after you set up the cultures, and then again after the bacteria have been in culture for an extended period. The assays will demonstrate the number of ampicillin-resistant vs. ampicillin-sensitive culture bacteria in each culture at each time. To perform each of the two assays, you prepare serial dilutions of the two cultures and plate them onto LB plates with and without ampicillin (the dilution) is simply to ensure that you will get some plates on which you can distinguish separate colonies).Describe what you expect to observe in the initial assay and in the second assay. What, if any, differences might you expect in terms of the ratios of ampicillin-resistant and nonresistant bacteria?

Which statement is false?Populations can have negative effects on their environment.
Populations can affect the size of other populations.
Populations have no effect on their environment.
Populations can adapt to changes in the environment.