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:
These are single-celled MESOKARYOTES constituting the phylum DINOFLAGELLATA
Explanation:
Their populations are distributed depending on sea surface temperature,e.t.c.
Hope it helps.
The answer is 4, because if the ants smell the same dead smell on this particular ant in the colony, their initial reaction is to eliminate it. The chemical sprayed upon the ant acts as a stimulus for a particular behavior.
<u>Answer:</u>
Jack is correct because a solution is not a type of mixture because the substances stay mixed together and cannot be separated. Each substance loses its primary physical properties.
Option: (D)
<u>Explanation:
</u>
- A mixture is composed of 'two or more different substances', physically combined and it is in the form of a solution, suspension or a colloid.
- A mixture may be homogeneous (salt and water) or heterogeneous (sand and water).
- A homogeneous mixture of two or more compounds is termed as solution. It has a solute and a solvent.
- The 'solute' is the substance dissolved in the solvent. Both lose their primary physical properties.
