The tilt in the axis of the Earth is called its obliquity. This angle changes with time, and over about 41 000 years it moves from 22.1 degrees to 24.5 degrees and back again. When the angle increases the summers become warmer and the winters become colder.anation:
Due to mutation and reproduction as well as ability of some organisms to survive, thrive and reproduce brought about changes in allele frequency as seen in the changes occurring at Locus 1048 and 1166.
<h3>Allele and allele frequency </h3>
- An allele is one of an alternate form of a gene.
- Allele frequency is the percentages of each of the different alleles of a particular gene in a population.
Changes in allele frequency that occur over time because of one or more evolutionary factors such as:
- genetic drift,
- gene flow,
- mutation,
- non-random mating,
- selection, etc.
The change in allele in the sea star wasting disease was due to genetic drift which are random change in allele frequencies that occurs in small populations occurring due to such factors as disease.
<h3>Evidence of allele frequency change in sea star wasting disease</h3>
1. Mutation and reproduction results in a variety of genes passed on and carries by individuals of a population.
- The changes that occcured at gene Locus 1048 and 1166 due to mutation helped the post-SSWD starfish to survive and reproduce giving rise to offspring with those changes.
2. Organisms who can survive, thrive, and reproduce will increase in number.
The about 20% post-SSWD starfish that survived due to the change in their allele were able to survive and reproduce rapidly giving rise to offspring such that the individuals in the population have almost risen to pre-SSWD numbers.
Therefore, due to mutation and reproduction as well as ability of some organisms to survive, thrive and reproduce brought about changes in allele frequency as seen in the changes occurring at Locus 1048 and 1166.
Learn more about mutation and evolution at: brainly.com/question/14438201
Explanation:
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
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The carbon cycle with 4 boxes connected by arrows. Box 1: carbon dioxide in the atmo… ... 4 boxes connected by arrows. Box 1: carbon dioxide in the atmosphere. Box 2: X. Box 3: consumers eat producers. Box 4: Y. The arrow that follows box 4 connects to box 1. Which labels best complete the flow chart?Explanation:
