The fossils which are plants and animal remnants change over time. The Law of Superposition is a law that governs the geochronology, which states that in any undisturbed sequence of rocks deposited in layers, the youngest layer can be found on the top and the oldest can be found at the bottom, with each layer being younger than the one under it and older than the one above it.
These elements works in a synergy to explain and to help persons of interest understand the idea of evolution which stresses out that the modern day species came from a distinctively different species.
Answer:
c. Directional selection
Explanation:
There are three types of selection: stabilizing, directional and disruptive. Currently seed cracker finches show disruptive selection with respect to bills. In disruptive selection two extreme phenotypes are preferred in population over the mean phenotype. Here either, small or large bills are beneficial for birds so it is an example of disruptive selection.
If due to some climatic change all seeds would become hard, it would be more beneficial for birds to have large bills. Slowly nature will select for birds with large bills rather than birds with small bills. The selection now will shift to directional selection since only one of the extreme phenotypes is being favoured.
I don’t know what the options are, but remember viruses are:
-nonliving (they cannot reproduce without a host)
-surrounded by a protein coat
-composed of DNA or RNA
-able to live for years
-unable to thrive outside of the host cell
-classified into 4 structural classes (helical symmetry, isometric symmetry, enveloped, bacteriophage)
Cardiovascular disease and cancer are the greatest causes of death in the united states. The given statement is true.
<h3>What is cardiovascular disease?</h3>
Cardiovascular disease is defined as disease related to heart such as high blood pressure, heart attack, and blockage in heart. Cancer is unwanted and unusual division of cell in the form of tumor which is known as cancer.
A circulatory system is defined as a system in the body that consists heart, blood vessels, arteries, veins and blood that all combined together to supply blood to all parts of body and takes up waste material from it.
Circulatory system have four major components and these are heart, veins, arteries, and blood. These are the four components that combined and form cardiovascular system.
Therefore, Cardiovascular disease and cancer are the greatest causes of death in the united states. The given statement is true.
Learn more about cardiovascular disease here:
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No. A mixture is a combination of two or more other substances.