Explain how to solve equations that involve the quotient of two functions as the ones given below: 1) f(x)/g(x) = 5 2) f(x)/g(x) = -5. In math equations, why do we always use x and y? Where did that come from? Identify the coefficients of the variable terms of the expre...
(for example, most hunter-gatherer societies do not have numbers larger than five9). Present human societies are based on these cultural innovations, but none of the latter were introduced within the millions of years during which humans lived as hunter-gatherers (indeed, all of those ...
When systemic arterial blood pressure is measured, it is recorded as two numbers. What are those two numbers? What defines each? How is blood pressure measured? What is blood pressure? What are the two readings called and what do they indicate about your hear...
Mussels, which occupy important positions in marine ecosystems, attach tightly to underwater substrates using a proteinaceous holdfast known as the byssus, which is tough, durable, and resistant to enzymatic degradation. Although various byssal proteins have been identified, the mechanisms by which it ...
Why do we waste time drilling for oil and shoveling coal when there's a gigantic power station in the sky up above us, sending out clean, non-stop energy for free? The Sun, a seething ball of nuclear power, has enough fuel onboard to drive our Solar System for another five billion ...
In a conventional car, the energy is stored in chemical form, locked inside the gas you've pumped in your tank; you release it through a chemical reaction happening inside the engine in which the hydrocarbon molecules in gasoline burn with oxygen in the air to release heat, which pushes ...
Multiple factors modulate microbial community assembly in the vertebrate gut, though studies disagree as to their relative contribution. One cause may be a reliance on captive animals, which can have very different gut microbiomes compared to their wild
Using a data set of 125 Y-chromosome sequences from modern humans, Karmin et al.4inferred an intense bottleneck in Y-chromosomes in various geographical regions of the Old World around 5000–7000 BP (Fig.1), suggesting a decline in the male effective population size during the Neolithic to ...