Breathing is regulated by ________
A) the diaphragm and chest muscles
B) the spinal cord
C) the circulatory system
D) control centers in the brain stem
D
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If citrate levels are high in the cell, but ATP levels are low, what do you think will happen in the cell?
A. In the presence of glucose, glycolysis will run to generate energy for the cell, but the Krebs cycle will be inhibited. B. Glycolysis will be inhibited, but the Krebs cycle will be functional, allowing it to be utilized to breakdown acetyl-CoA generated from beta-oxidation. C. The electron transport chain will be inhibited, causing a build-up of NADH and FADH2. This will inhibit the Krebs cycle, but in the presence of glucose, glycolysis will still run coupled with fermentation to regenerate NAD+. D. Glycolysis and the Krebs cycle will both be inhibited, thus under these conditions there will be no mechanism to generate ATP.
What continent was the starting point for the origination of humans?
A. Africa B. Asia C. Europe D. Australia E. North America
Which of the following best describes a species' niche?
A. where it lives B. what it eats C. all of the climatic conditions to which it is adapted D. with whom it reproduces E. its habitat and how it uses available resources in that habitat
In garden peas, smooth seeds are dominant to wrinkled ones, and yellow pea color is dominant to green. In a dihybrid cross of SsYy x SsYy, what proportion of the offspring from this cross is expected to be both smooth and yellow?
1.9/16
2.3/16
3.1/16
4.none