A phylogenetic tree is the representation of the evolutionary relationships among species. The fossil records are used as evidence to develop a phylogenetic tree. Thus, option A is correct.
<h3>What is a fossil record?</h3>
A fossil record is a depiction of the organisms that shared common ancestors and depicts the change in the structural and functional unit of the organism over many years of time.
They are used to illustrate the phylogenetic tree to show the morphological, structural, chemical, anatomical, etc variations in species that shared ancestry.
Therefore, option A. fossil records are used to show the common ancestry at the nodes.
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Answer:
The missing of Taq DNA polymerase will affect the DNA synthesis or polymerization step.
Explanation:
Taq DNA polymerase is also known as termostable DNA polymerase because it is able to exert its catalytic activity at high temperature.
Taq DNA polymerase is used for the 3rd step of polymerase chain reaction which deals with the joining of nucleotides by phosphodiester bond formation.
The missing or lack of Taq DNA polymerase will affect the DNA synthesis step of PCR.
Answer: reducing all communication after conflict occurs
Explanation:
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Explanation:
Selection pressure means factors that contribute to selection which variations will provide the individual with an increase chance of surviving over others. Because of selective pressures, organisms with certain phenotypes have an advantage when it comes to survival and reproduction. Over time, this leads to evolution.
The youngest layer present on the top whereas the oldest layer is present at the bottom.
<h3>Which layer is youngest or oldest?</h3>
Quartz or calcite lines in layers of rock indicate that rock has minerals.
The youngest rock layers are present on the upper while on the other hand, the oldest are present on the bottom side because new layers are formed when there more sediments deposited on the layer.
So we can conclude that the youngest layer present on the top whereas the oldest layer is present at the bottom.
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