Many European larger banded snails live in forest habitats. Imagine that a forested area that provides habitat to some of these snails is impacted by a widespread fire that burns much of the
plant matter, leaving the area heavily covered by black ashes.
Place an X in one of the boxes provided next to the data line on the graph that correctly represents
the likely effect of the fire on the frequency of the light-colored shell trait in the snail population in
this area over time.
s in
equency of Light-Colored Shell Trait
increasing

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas