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3 years ago

14

The ion primarily responsible for depolarization in pacemaker cells is ______________, whereas the ion primarily responsible for

this in other cardiac cells is _____________.

1 answer:

snow_lady [41]3 years ago

5 0

1. Calcium
2. Sodium

Hope this helps! :)

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In Marker Analysis, how are STRs related to alleles? Be sure to define each term (STR and allele) and explain how the two result

Lisa [10]

Answer:

The number of STR repeats is unique and therefore it is considered as an allele of that <em>locus</em>

Explanation:

Short Tandem Repeats (STRs), also known as microsatellites or simple sequence repeats (SSRs), are short DNA sequences with a size of 1-6 nucleotide bases which may be many times repeated in tandem. STRs localize in specific regions of the genome (<em>loci</em>) and therefore they are molecular markers. Gel electrophoresis a technique used to separate DNA fragments based on their size. In consequence, the pattern of STR repeats or 'alleles' obtained by electrophoresis can be used to identify individuals. In a gel electrophoresis, STR markers produce different bands that run more slowly or faster on the gel in different lanes according to their size (e.g., more slowly >> higher size of the STR sequence), and thereby STR alleles are unique and serve to identify individuals.

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3 years ago

What are the 4 ingredients in DNA??

maksim [4K]

<span>adenine (A), cytosine (C), guanine (G) and thymine (T)
I think
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1. How did dark matter affect the development of structures in the early universe?

-Dominant- [34]

Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

<u><em>Please don't use these answer's to cheat they are to help only.</em></u>

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3 years ago

Barry was on an antibiotic, but after he took all of it, he had a rash and the doctor prescribed him an antihistamine. Which mos

S_A_V [24]

He had a bacterial infection, but then developed an allergy to the antibiotic.

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Which statement about water is correct? and why?

PtichkaEL [24]

Answer:

A

Explanation:

ice's density is lower that water's density

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3 years ago