Sugar dissolves readily in water because it is a(n) ____ substance
a. adhesive
b. cohesive
c. hydrophilic
d. hydrophobic
e. evaporative
c
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The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3You are investigating a massive fish kill in one of the shallow lakes in the area. Lab reports show no toxins in the water, but a monitoring station reported these oxygen and pH values. Based on the table above, what, if any, is the relationship between oxygen and pH?
A. No relationship: there is no pattern between oxygen and pH B. Exponential relationship: when one increases, the other increases 10 to 100 times C. Inverse relationship: when one increases, the other decreases D. Direct relationship: when one increases, the other also increases
Crossing over occurs during which step in meiosis?
A. prophase 1 B. anaphase 1 C. prophase 2 D. metaphase 1
Wavelike movements that propel food through the digestive system are called:
a. peristalsis b. contractions c. muscle propulsion d. cilia beating e. microvilli and villi motion
The structure at letter "B" is the ____ which ____
a. tongue; produces speech b. epiglottis; closes the larynx c. larynx; produces sound d. epiglottis; closes the esophagus e. pharynx; holds the trachea open