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Ksenya-84 [330]
3 years ago
14

What organelle transports materials within the cell

Biology
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

The endoplasmic reticulum

Explanation:

hope this helps you if it does please mark brainliest

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Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e
cricket20 [7]

Answer:

  • The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
  • According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
  • After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.
8 0
4 years ago
A large balloon is taken to a shady area and filled with cool air. The balloon is then taken to a bright, sunny location. After
Rina8888 [55]

Answer:

as particles gain energy and the material takes up more space

Explanation:

The cool air thats now in a hot area is expanding and taking up more space in the balloon, this is why the baloon starts to swell up

3 0
3 years ago
What are natural causes of earthquakes that is what are the tectonic features and actions that result in seismic waves?
oksian1 [2.3K]
Anearthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called the fault.
or

An earthquake is the result of a sudden release of stored energy in the Earth's crust that creates seismic waves.

Earthquakes are accordingly measured with a seismometer, commonly known as a seismograph.

The magnitude of an earthquake is conventionally reported using the Richter scale or a related Moment scale 





An earthquake is caused by tectonic plates getting stuck and putting a strain on the ground.

The strain becomes so great that rocks give way by breaking and sliding along fault planes.

Earthquakes may occur naturally or as a result of human activities.

Smaller earthquakes can also be caused by volcanic activity, landslides, mine blasts, and nuclear experiments.




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3 years ago
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What has occurred?
NISA [10]

Answer:

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