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3 years ago

Describe the manner in which you would determine how long ago two species of bacteria diverged from one another.

Biology

1 answer:

Andrei [34K]3 years ago

3 0

Answer:

One of the probable ways to determine how long ago any two species of bacteria diverged from each other is by drawing a phylogenetic tree.

Explanation:

Phylogenetic tree are trees that show the ancestry of two species of interest and the relationship between them.
The idea behind the construction of phylogenetic tree is darwins's "descent with modification theory".
A phylogenetic tree is constructed using the similarities or differences in either physical characteristics, behavorial, or genetic buildup.
Derived traits shared between the different species are the actual data used to construct a phylogenetic tree.

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After glycolysis happens in the cytoplasm, where do the pyruvate molecules that were made from the food go for the next step in

Grace [21]

Answer:

Mitochondria

Explanation:

Pyruvic acid enters the mitochondria where in the presence of oxygen it is converted into acetyl coenzyme A. Acetyl coenzyme A joins the Krebs cycle in which it is broken down to carbon dioxide, water and energy which is used to produce ATP. ATP is a complex organic molecule.

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3 years ago

hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support

Gwar [14]

Hi,

Harshey and Chase did a great experimentation which was basically a two step experiment to prove that DNA and not proteins are the actual carriers of genetic information from parents to offspring.

In the first part of their experiment, they used bacteriophages (virus that eat bacteria). They used radioactively labeled sulphur(35S) medium to grow bacteriophages and observed that all the bacteriophages had proteins with radioactive sulphur(35S).

In the next step they allowed these phages to infect bacteria and to their surprise, they found that the bacteria did not had radioactively labeled sulphur in them because the coat of bacteriophage stays outside the body of bacteria when it attacks it. This proved that DNA not proteins were the hereditary material.

To make their results more reliable, they did a second experimentation in which, they marked the DNA of the phage with radioactive phosphorus 32P. After labeling DNA, they repeated the same experiment and this time, they found radioactive phosphorus inside the bacteria.

<em>This meant that the bacteria had DNA of phage entered inside them and this again proved that DNA not proteins are the hereditary material. You can see attached image for better understanding. </em>

Hope it help!

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3 years ago

What process causes water to move in and out of the central vacuole? explain

xxMikexx [17]

Answer:

In plant cells, osmotic pressure can cause changes in the size of the central vacuole, which shrinks or swells as water moves into or out of the cell.

Explanation:

Hope this helped, Have a Great Day/Night!!

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3 years ago

Read 2 more answers

sphere do you think is the most important to study and why your answer should include information about all four spheres (hydros

Genrish500 [490]

I believe studying the hydrosphere would be most important because we haven't explored a good majority of it yet so we need to explore our waters before we explore space

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3 years ago

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In snapdragon flowers, red flower color (R) is incompletely dominant to white flower color (W), making pink flowers when the het

Otrada [13]

Answer:

Explanation:

To solve this, we can use a Punnett square.

R R

R RR RR

W RW RW

From this cross, there are two possible genotypes: RR and RW. The genotype RR results in a red flower, and the genotype RW results in a pink flower. Since the genotype WW is not possible with this cross, none of the offspring are expected to have white flowers.

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3 years ago