Biology 101

Technologic advances during this century have led to unparalleled improvements in comfort, productiv- ity, and life span. There has also been negative impact from technology as shown by increases in fatal and nonfatal trauma (e.g., motor vehicle injuries), coronary artery disease (promoted by more sedentary lifestyles), and environmental degradation (resulting from a vari- ety of factors including land use, motor vehicle ex- haust, and refrigerants). Other events, like massive urbanizat...

Not all new threats from microorganisms result from changes within the microorganisms themselves. Innovative, progressive changes introduced by hu- mans can provide advantages to microbes which, in turn, threaten the population. In most cases, advan- tages are provided unwittingly as a by-product of technology, and can be corrected when the problem is recognized. An end to progress is neither a practical nor desirable solution. Alertness (i.e., surveillance) for the emergence of new dis...

the Chromosomal Theory of Inheritance helped to advance our understanding of genetics? Gregor Mendel who is said to be the father of genetics postulated the following laws of inheritance: • The law of dominance;

BI4. The cell’s supply of ADP, Pi, and NAD+ is finite (limited). What happens to cellular respiration when all of the cell’s NAD+ has been converted to NADH? If NAD is unavailable, the cell is unable to conduct any processes that involve the conversion of NAD+ to NADH. Because both glycolysis and the Krebs cycle produce NADH, both of these processes shut down when there is no available NAD+ . 5. If the Krebs cycle does not require oxygen, why does cellular respiration stop after ...