Tag Info

New answers tagged

6

The distribution of temperate hardwood forests, as well as deserts, tundras, savannahs, and other ecosystems, is determined primarily by average climate conditions, specifically average annual temperature and precipitation. You can see how biomes are related to climate in this figure, taken from Whittaker (1975): Temperate forests tend to be between ...


0

In addition to the above answers, the answer to your question also depends on your definition of immortality. There are a number of clonal organisms (the most famous of which is probably Pando, a quaking aspen https://en.wikipedia.org/wiki/Pando_%28tree%29 ) where there is a large area, sometimes multiple square miles, where individual shoots are sent above ...


0

Not sure, this what you need, but here you can find a detailed description of how photosynthesis efficiency can be measured in the field, with a list of modern devices. In short, it's about measuring the uptake of CO2 and release of H2O of individual leaves.


1

From Whittle and Johnston (2006): Specifically, human epidemiological data and/or nucleotide substitution rates of selectively neutral DNA (which equals the mutation rate, Kimura, 1983; Miyata et al., 1987) have shown that more mutations occur in the male than in the female germ line for numerous animal taxa (e.g. humans, mice, chickens, and sheep) and ...


1

D-Glucose and L-Glucose have similar names only because we humans decided that's how we should name sugars; they have as much in common as, for example, D-Glucose and D-Allose (one chiral bond is different). So, in essence, organisms don't synthesize L-Glucose for the same reason they don't synthesize D-Allose: they have no use for it. Its similarity to ...



Top 50 recent answers are included