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loris [4]
3 years ago
12

Which situation would most likely be a driving force for changes in a species?

Biology
1 answer:
ehidna [41]3 years ago
6 0

I think it's C.

Explanation:

Good Luck!

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6. (3 pts) After transformation, 40 colonies were present on the plate. What is the transformation efficiency of the competent c
natali 33 [55]

Answer:

Given:

Number of colonies on plate = 40

Amount of DNA used for transformation = 100ng

Volume of competent cells used = 100ul

Total volume = 1ml (1000ul)

Volume plated for growth = 200ul

The amount of cells transformed per 1 µg of DNA is called the transformation efficiency

(CFU is colony forming units) => (number of colonies on plate/ng of DNA plated) X 1000 ng/µg = CFU/µg of DNA

Amount of DNA used for plating = 100ng * (200/1000)

                                                      = 100ng * (1/5)

                                                      = 100/5 = 20ng

Efficiency calculation = 40 colonies / 20ng = 2 colonies/ng

               (2 colonies/ng) * (1000 ng/µg) = 2000 CFU/ug DNA

Transformation efficiency = 2000 Transformants / ug DNA

                                          = 2 x 10³ Transformants / ug DNA

Explanation:

Efficiency of transformation is highest in the 100 pg-1 ng range, so Low transformation efficiency could be because of high amount of DNA used for transformation.

6 0
2 years ago
What is the function of agarose gel?
NISA [10]
It is clinically used to separate <span>a mixed population of macromolecules such as DNA or proteins in a matrix of </span>agarose<span>, which is one of the two main components of agar.</span>
7 0
3 years ago
One disadvantage to experimental research is that experimental conditions do not always reflect reality.
dybincka [34]

True, you cant always have the ideal conditions in the real world

5 0
2 years ago
Read 2 more answers
What do you notice about the temperature at each of the layers boundaries
ankoles [38]

Answer: The mesosphere starts at 31 miles (50 km) and extends to 53 miles (85 km) high. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere, with temperatures averaging about minus 130 degrees F (minus 90 C). This layer is hard to study

Explanation: hope this helps please give brainliest!

4 0
2 years ago
Explain what you think would happen to an egg placed in salt water? Describe why this would occur.
mamaluj [8]

Answer:

An egg placed in salt water will float!

Explanation:

In normal tap water, an egg will sink because it's density is greater than the density of water. But, when salt is added to the water, it's density becomes greater than the egg's density. The term used to describe this is "buoyancy."

7 0
2 years ago
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