There are more species in tropical areas than in places more distant from the equator. This is probably a result of _____
A) fewer predators
B) more intense annual solar radiation
C) more frequent ecological disturbances
D) fewer agents of disease
Answer: B
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If fermentation pathways follow glycolysis, ____
a. CO2 will be one of the products as pyruvate is converted to lactate b. the two NADH molecules produced during glycolysis will (depending on the organism) be used to reduce pyruvate to either lactate or ethanol and CO2 c. ATP will be required to convert pyruvate to either lactate or ethanol and CO2 d. oxidative phosphorylation occurs either on the plasma membrane or on derivatives of the plasma membrane e. ATP will be required to convert lactate to pyruvate and CO2
When the generative cell divides, the daughter cells are sperm cells
____________________ Indicate whether the statement is true or false.
The large central opening in the poriferan body is called the _____.
a) emmule b) picule c) stia d) osculum
Four-year-old Sammy is having a temper-tantrum. In a final attempt to get his way, he yells to his mom, "I'm gonna hold my breath 'til I die!" What is the primary reason that Sammy's mom is unconcerned by this statement?
A. It is impossible for Sammy to control the contraction of his diaphragm and intercostal muscles since they are made up of smooth muscle. B. Sammy is too young to hold his breath for more than 30 seconds. C. As Sammy holds his breath, the increasing levels of carbon dioxide in his blood will lead to stimulation of the respiratory control center in his brain. D. As Sammy holds his breath, the decreasing levels of oxygen in his blood will lead to stimulation of the respiratory control center in his brain.