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Flura [38]
3 years ago
12

What new piece of evidence, supporting biogenesis, was provided by Pasteur's experiment? A) S-necked flasks prevented both micro

organisms from contaminating the broth and air from entering the flasks. B) S-necked flasks prevented microorganisms from contaminating the broth, even though air still entered the flasks. C) Pasteurs experiments with S-necked flasks supported the hypothesis that microorganisms are not found in the air. D) Pasteur set up an experiment with both open and sealed flasks, thus employing a control or standard of comparison.
Biology
2 answers:
Reptile [31]3 years ago
4 0
Hello,


The answer would be D.Pasteur set up an experiment with both open and sealed flasks, thus employing a control or standard of comparison.
yan [13]3 years ago
4 0
<span>What new piece of evidence, supporting biogenesis, was provided by Pasteur's experiment?

</span>
<span> B) S-necked flasks prevented microorganisms from contaminating the broth, even though air still entered the flasks. </span>
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The La Brea Tar Pits in Los Angeles are the site of millions of fossils from the ice age. Woolly mammoths, giant sloths, dragonf
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Answer:

Scientists learn how climatic changes during the ice age affected life in this region by analyzing specimens found in these tar pits  

Explanation:

La Brea Tar Pits are a group of tar pits in Los Angeles. Many preserved remains of ancient organisms (i.e., fossils) were extracted from the tar, including, among others, Western horses, prehistoric camels, three-toed tapirs, rodent bones, insects, mollusks, wood, plants, etc. The oldest fossils have been dated to be approximately 38,000 years ago by radiometric techniques. Moreover, the Last Glacial Period was the most recent glacial period within the Quaternary glaciation, which encompassed the period between 115,000 to 10,000 years ago. This period (LGP) encompassed the Last Glacial Maximum (LGM), which occurred about 20,000 years ago. In consequence, many of the fossils found in La Brea Tar Pits evidence how the ice age affected life in this region. Moreover, many of the fossil species extracted from the tar are still present today, thereby indicating how these species adapted to fluctuating climatic conditions, whereas certain species couldn't adapt fast enough as the environment changed and therefore they went extinct.

5 0
3 years ago
A scientist attends an annual conference hosted by the American Medical Association. At which type of event is she most likely t
Anvisha [2.4K]
<span>A. Keynote address

In the Keynote address is most likely a world-famous surgeon would give his/her speech in order to motivate, inspire and challenge pursing scientists and medical professionals in their pursuit of their successful career and the like endeavors. </span>
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3 years ago
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Which of the following factors might cause checkpoint genes to interrupt cell division? Check all that apply. Neurological signa
Strike441 [17]

Answer:

Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.

Explanation:

All the three options given can cause checkpoint genes to interrupt cell division.

Checkpoint genes are transcription genes that control cell cycle and sense defects during cells processes like DNA replication, segregation e.t.c and create response till the defects is repaired in the DNA. The important of checkpoint is that it ensure enough nutrients are available to support for division, ensure that the DNA has not been damaged, ensure that cells DNA is copied correctly and make sure cells have enough RNA for their protein synthesis.

Checkpoints genes can interrupt cell division if the dna is damaged, Dna is copied incorrectly and neurological signal sent from fear responses in an organisms tell the cells to stop.

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4 years ago
Are triglycerides dengerous
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They are not something that you prevent from being made in your body. They are automatically made when you eat food that is not automatically converted into calories. This is used for energy later on for you body.

But too much of triglycerides is bad for you. This condition is called hypertriglyceridemia. Your doctor can detect if you have this condition by simply running a lipid panel (a blood test) that measures your overall cholesterol, you LDL and HDL cholesterol, and also measuring your triglycerides.

If you do take this test, they will make you fast for about 8 hours. They make you do this because triglycerides are usually lowest after you fast but goes up really high after a big meal (like a Thanksgiving Dinner!).

(Extra: your triglycerides are measured in milligrams per deciliter (mg/dL) and if your levels are:

BELOW 150 -----------------Healthy

150-199 -----------------------Borderline

200-499 ---------------------High

500+ --------------------------Very High


Most people are under 200, so in the end, you don't have to worry about your triglyceride levels.

You can read more about it here: https://www.cardiosmart.org/Heart-Conditions/High-Cholesterol/High-Cholesterol-Home/Very-High-Triglycerides


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3 years ago
1.This method of reforestation is done by natural means with the aid of the wind,birds,rodents and running water which scatters
ANEK [815]

Answer:

  1. T. Natural Reseeding.
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Explanation:

Natural reseeding uses natural elements and actors to plant the seeds of trees. These elements and actors include water, wind, birds, rodents and other actors capable of scattering seed.

Species diversity is what defines the differentiation between the different species in an ecosystem and Ecosystem diversity relates to how biological communities/ ecosystems can be different from each other based on the organisms and food chains available in each.

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