Answer:
directional selection
Explanation:
The directional selection is a type of Darwinian selection where a particular phenotype is favored in the population, thereby modifying the allelic frequencies to increase the proportion of the favored phenotype. <em>Biston betularia</em>, also known as peppered moth, is a species that was influenced by directional selection in its recent past. Before the industrial revolution, the frequency of light-colored moths was predominant compared to the darker-colored phenotypes, because this color has higher adaptive fitness in a clean, no pollution environment, thereby light-colored moths were able to avoid predatory birds. However, during the industrial revolution, the frequency of dark-colored moths increased in response to pollution (i.e. darker environment), thereby conferring a higher adaptive fitness to darker phenotypes.
Answer:
Fungi are more like animals because they are heterotrophs, as opposed to autotrophs, like plants, that make their own food. Fungi have to obtain their food, nutrients and glucose, from outside sources. The cell walls in many species of fungi contain chitin.
Explanation:
The energy being described her is <u>potential energy.</u>
First, crossing-over and the subsequent rearrangement of alleles on homologous chromosomes leads to gametes with a new mix of genetic material. Second, when the gametes fuse, new combinations of alleles result.
Pangaea began to break up into smaller continents, during the Mesozoic Era.
2. Look for a layer of sediment that is full of iridium.
This layer would represent the asteroid that scientists think hit Earth. The layer is the boundary in rock layers between the Cretaceous and Tertiary Periods.