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3 years ago

What changes you might observe in the fossil record that would indicate the occurrence of a mass extinction?

1 answer:

8 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
The changes you might observe in the fossil record that would indicate the occurrence of a mass extinction is the disappearance and subsequent absence of many up till then long-established groups.

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Difference between synaptic and spiking activity

boyakko [2]

Electrical
Neurons typically communicate using ___________ signals to communicate within a neuron.

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3 years ago

Given that equal amounts of the different mRNA’s were injected into fertilized frog eggs, which of the following conclusions is

Degger [83]

Answer:

Answer is A. B-hemoglobin mRNA is translated more efficiently than is a-hemoglobin mRNA.

Explanation:

The introduction of electric charge into a gel or fluid, causing or resulting in the movement of the charged particles in the gel or fluid, is referred to as the electrophoresis. It can also be explained as a separation method or technique which is based on the movement of particles or ions in an electric field.

The electrophoresis is used in separating DNA fragments , RNA or protein, based on their size and charge.

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3 years ago

Diagnose: Mrs. Harris is a 60 year old white woman. She has noticed in recent years that her height has slightly decreased. Rece

Brut [27]

Answer:

Q: Which skeletal system disorder might she be suffering from?

A: Osteoporosis

Q: What techniques could be used to diagnose her condition?

A: Bone mineral density (BMD) test or dual energy X-ray absorptiometry (DXA) scan

Q: What treatments are available?

A: Medication, healthy food.

Explanation:

The vertebral discs between vertebrae could shrink with age. Therefore, a height loss up to 1-inch is normal. However, if the height loss is more then it is possibly due to osteoporosis.

A bone mineral density test, also known as dual energy X-ray absorptiometry scan, is a well-adapted test to measure the amount of calcium and other minerals in the bones. It uses X-rays to measure the content of calcium and thus strength of bones.

A person who is already suffering from osteoporosis should be treated with medicine right away so that it stops further deterioration of the bones and avoid any future bone fractures. Further, it can be handled by eating a healthy diet and supplements such as vitamins D. In case some of the bones/vertebrae are already fractured, surgical approaches might be necessary.

8 0

3 years ago

PLEASE HELP WILL MARK BRAINLIEST Jaiden is writing a report about the structure of an atom. She says an atom has three main part

Musya8 [376]

Answer:

disagree, an atom has two main parts. the nucleus & electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons.

Most atoms have three different subatomic particles inside them.

Explanation:

6 0

2 years ago

The initiation of transcription requires melting of the DNA double helix, i.e. separating hydrogen-bonded base pairs, immediatel

sertanlavr [38]

Answer:

The correct answer is B. DNA helicase first unwinds the double helix around the +1 site.

Explanation:

The helicase is an enzyme that specifically breaks the hydrogen bonds of the bases in the transcription process. As E. Coli is a prokaryote, then, the transcription only occurs in one point of the circular DNA. The promoter region indicates where the DNA polymerase has to start replicating and the Topoisomerase unwinds the parts of the DNA that are being excessively twisted because of the separation of the two strands.

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3 years ago