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Assoli18 [71]
4 years ago
12

A scientist observed a certain type of a particular bacteria growing in a substance that had a 1,000 times higher amount of the

antibiotic that targets this bacteria. Using complete sentences, justify the observation based on your knowledge of natural selection.
Biology
1 answer:
Taya2010 [7]4 years ago
5 0

Answer: This is an extremely drug resistant bacteria that must have inherited genes against this drug resistant from a parent bacteria that was exposed to the drug or substance. The parent bacteria went through a mutation to survive this environmental pressure and transferred that gene or mutation to its offspring.

Through natural selection and horizontal gene transfer this bacteria is able to survive in the presence of a molecule that is supposed to kill it and has developed extreme resistance against.

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To assess Mendel’s law of segregation using tomatoes, a true-breeding tall variety (SS) is crossed with a true-breeding short va
lapo4ka [179]

Answer:

0.949367 ≈ 0.95.

Explanation:

The chi square analysis can be done by the formula as follows:

Chi square = (O-E)²/E

Here, O is observed value and E is expected value.

The tall trait follows the Mendel's law, this means the cross between F1 results in the formation of progeny with ratio 3( tall) : 1 (short).

The observed values for set I is  63 tall, 16 short.

The expected value for tall plant =  \frac{3}{4}\times79 = 59.25 .

The expected value for short plant = \frac{1}{4}\times79 = 19.75.

Put these value in the formula for chi square analysis:

For tall plants = ( 63 - 59.25)²/ 59.25= 0.237.

For short plants = (16 - 19.75)²/ 19.75 = 0.712

Total value for set I = 0.237 + 0.712 = 0.95.

Thus, the answer is 0.95.

6 0
4 years ago
Help plz ASAP!!!!! <br> WILL MARK BRAINLIEST FOR THE CORRECT ANSWER!!!!
KIM [24]

Answer:

C

Explanation: it fixes nitrogen

8 0
3 years ago
Read 2 more answers
Changes in temperature, pressure, and _____ affect gases more than solids or liquids.
sleet_krkn [62]

Answer:

Changes in temperature, pressure, and Volume affect gases more than solids or liquids.

Explanation:

hmm I guess..........

4 0
3 years ago
A geneticist analyzes the four products of a meiosis for an Aa Bb plant and finds that two of the products have the AB alleles a
slega [8]

Answer:

No, this is not consistent with the principle of independent assortment.

Explanation:

The principle of independent assortment states that alleles from different genes assort independently. This means that if a plant has a genotype Aa Bb, all four alleles (A, a, B, and b) are going to segregate equally, so we will have the following four gametes after meiosis:

- AB

- Ab

- aB

- ab

If the researcher finds that two of the four products are AB, probably there would be a deviation of Mendel's laws.

3 0
4 years ago
Describe the structure of the nucleus and explain the function of each part.
Minchanka [31]

The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.

6 0
3 years ago
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