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Delicious77 [7]
4 years ago
15

In 1988, a biologist named Richard Lenski introduced 12 genetically identical populations of E. coli to test tubes and subjected

them to the same conditions: a period of growth followed by starvation. After several years, all 12 strains had adapted to the conditions in similar ways; however, their genetic sequences were very different. Which of the following conclusions from this experiment is CORRECT
Biology
1 answer:
lana66690 [7]4 years ago
6 0

Answer:

Let's add the options in order to make it a correct question

a. Similar phenotypes may result from a variety of underlying genotypes

b. Similar selective pressures on genetically identical organisms can

have different effects at the level of the genome.

c. Evolution by natural selection can be directly observed in organisms with short generation times.

d. The 12 E. coli populations underwent convergent evolution resulting from similar environmental

conditions

e. All of the above are

correct conclusions drawn

from Richard Lenski's

experiments.

THE CORRECT ANSWER IS E.

e. All of the above are correct

conclusions drawn fram Richard

Lenski experiments

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¿Qué se puede agregar a un átomo para hacer que un electrón sin valencia en el átomo se convierta temporalmente en un electrón d
NNADVOKAT [17]

Energía.

Explicación:

Generalmente, los electrones giran continuamente en las capas de los átomos. Si estos electrones se encuentran en las capas más externas de un átomo, se denominan electrones de valencia.

Son necesarios para las reacciones químicas de un átomo en particular con otro, a través de sus pérdidas o compartidas.

En los átomos sin valencia, sus capas más externas no tienen electrones en sus capas más externas, tales átomos son estables.

Sin embargo, si se suministra cierta cantidad de energía a dicho átomo, el electrón gana energía y, por lo tanto, se excita.

Por lo tanto, se mueven de niveles de energía más bajos a niveles de energía más altos, y hacen que el átomo sin valencia se convierta en valencia temporalmente, a medida que se mueven hacia la capa más externa.

Answer:

Energy.

Explanation:

Generally, electrons revolves continuously in the shells of  atoms.if these electrons are located in the outer most shells of an atom,they are refereed to as the Valence electrons.

They are needed for chemical reactions of a particular atom with another,through their loses or sharing.

In Non -valence atoms their outermost shells do not have electrons at their outermost shells,such atoms are stable.

However, if  certain quantity of energy is supplied  to  such atom, the electron  gains energy and therefore becomes excited.

They therefore move from lower energy levels to higher energy levels,and makes the non- valence atom becomes valence temporarily, as they move into the outermost shell.

5 0
3 years ago
Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be cal
Contact [7]

According to the research, the correct answer is fiber composites. Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be called fiber composites.

<h3>What are cell walls?</h3>

It is a network that covers prokaryotic cells and plant cells that is located outside the plasma membrane, helping to form the structure.

In this sense, since it is made up of a network of carbohydrates, phospholipids and structural proteins, and the different cell types of plants can be identified by their characteristics, they can be called fiber composites.

Therefore, we can conclude that cell walls are a network embedded in a matrix composed of carbohydrates and proteins.

Learn more about cell walls here: brainly.com/question/965751

#SPJ1

8 0
1 year ago
I need help on this question.​
Alecsey [184]

Earth’s global temperature has changed greatly in the past hundreds of years. This is due to how much energy the planet is receiving from the sun and how it radiates back. Another cause is humans, due to deforestation, burning of fossil fuels, pollution, etc.

4 0
3 years ago
A molecule composed of adenine (nitrogenous base), ribose, and three phosphates is known as
PIT_PIT [208]
Nucleic acids is what it would be known as
7 0
3 years ago
9) It is a warm summer night, 32oC, with the relative humidity at 100%. During the night, the air temperature drops to 18oC. You
Verdich [7]
9. It is a warm summer night, 32oC, with the relative humidity at 100%. During the night, the air temperature drops to 18oC. You would expect to see___on the ground in the morning. 

 A) dew

10. Scientists believe that during the Late Cretaceous period, many small seas dried up and new mountains began to rise. Which would MOST LIKELY cause them to believe the temperature decreased during this time?

A) The absence of fossils of warm-weather plants.

11) A hurricane is MOST LIKLEY to occur in an area

   A) near warm water.

12) A team of archaeologists excavating a sedimentary rock layer come across some primitive hunting tools used by early humans. As the dig progresses, they unearth the fossilized remains of a dinosaur from another layer of the sedimentary rock. Why do these discoveries indicate that the rocks were formed over millions of years?

C) Dinosaurs became extinct millions of years before humans appeared.

Hope I helped!

8 0
3 years ago
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