Answer:
He discovered the cell nucleus and realized that inside the nucleus there was an unknown chemical substance. That substance was DNA.
Explanation:
Who discovered the DNA was Friedrich Miescher, a Swiss biochemist with great talent. Miescher, using substance precipitation techniques, such as pH changes in the medium, was able to discover and isolate the cell nucleus. Inside the nucleus he was able to isolate a previously unknown substance. It was the nucleic acid, DNA, which, at the moment, with the technology available until then, presented itself only as a white, flocculent precipitate, which Miescher would later call nuclein.
In 1869, Friedrich Miescher isolated "nuclein," DNA with associated proteins, from cell nuclei. He was the first to identify DNA as a distinct molecule. Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA.
To sum it up the answer is yes.
analysis
constant
conclusion
Sandy soil
Silty soil
Clay soil
Answer:Which type of soil drains water most easily?
Silty soil
Loamy soil
Sandy soil
Correct!
Clay soil
Explanation
Sandy soil contains a lot of sand, which is made up of large particles. Sand drains water very easily.
Explanation:
Answer:
Sandy Soil
Explanation:
stopwatches, and computers. Describe how you might
use that technology to analyze this following problem:
How is a runner's speed affected by wind?
A tailwind will boost up the speed of the runner while a headwind will slow the runner down.
A tailwind is a wind that is blowing along the direction of the runner approaching. Whereas a headwind is the wind that blows opposite to the runners approach.
This happens because the body is actually running flat to the wind which gives a resistance to the wind flow. So the wind actually pushes the body forward or backward. If the wind is coming from back, the wind pushes the athlete towards front, increasing his speed by a few miles per hour. When the wind is coming from front, the wind is actually pushing the athlete backwards, which decreases the speed.
The wind also makes it difficult for the athlete to breathe, thereby decreasing the speed to a certain extent in general.
Answer:
I would set up the wind machine so it was blowing against people running. I would have it blow at different speeds in different trials. I would use a stopwatch to record the time of each trial for the runners. I would use the computer to help analyze the data from the trials.
Explanation:
It was the answer provided.
The sentence that use the word biome is, "Rainforests are the oldest living biomes on Earth."
Various continents may have different biomes. The word "biome" encompasses a wider range of environments than "habitat."
Any place is categorized as a biome based on the species that call it home. Scientists may define a biome by defining the temperature range, soil type, quantity of light, and water that are peculiar to a location and create niches for particular species.
There are many kinds of biomes, such as deserts, tundra, grasslands, coniferous woods, and temperate deciduous forests.
Learn more about biome, here:
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