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stiv31 [10]
3 years ago
7

A blockage in a blood vessel leading to the brain may cause an area of the brain to stop working and die. Which term is used to

describe this condition? A) stroke B) heart attack C) arteriosclerosis D) electrocardiogram
Biology
1 answer:
Juli2301 [7.4K]3 years ago
6 0

Answer: a stroke

Explanation:

Heart attack affects the heart

Arteriosclerosis probably affects the arteries since it has arter like arteries

Electrocardiogram has cardio in it so it affects the heart

Stroke is the only one that makes sense

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Using evidence from the Sea Star Wasting Disease case study, explain how change in allele frequency over time (evolution) happen
Vikki [24]

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

3 0
2 years ago
___is the main energy source for all life on earth
Kay [80]

i think its  solar i might be wrong

6 0
2 years ago
Read 2 more answers
Explica el impacto del desarrollo de las técnicas moleculares en los sistemas de clasificación de los organismos.
docker41 [41]

Answer:

Las técnicas moleculares, especialmente aquellas basadas en la manipulación del material genético, permitieron automatizar el proceso de identificación y clasificación de especies

Explanation:

Las técnicas moleculares usadas para la clasificación de organismos son aquellas principalmente relacionadas a la manipulación de su material genético. En especial, las técnicas de extracción de ADN, amplificación mediante la reacción en cadena de la polimerasa (PCR) y posterior secuenciación han posibilitado automatizar el proceso de clasificación de organismos. Los marcadores moleculares de ADN basados en secuencias génicas evolutivamente conservadas tales como, por ejemplo, la secuencia del gen Citocromo Oxidasa I (COI) en animales, son ampliamente usados para automatizar este proceso de identificación y clasificación de nuevas especies.

8 0
2 years ago
An ecologist is studying a desert ecosystem like the one modeled in the energy pyramid. Which of the limiting factors would affe
kenny6666 [7]

Answer:

I think A. The number of cacti, flowering shrubs, and desert trees that could grow during an extended dry period.

Explanation:

6 0
2 years ago
How does an enzyme influence a chemical reaction In a cell ?
Basile [38]
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
3 0
2 years ago
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