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Soil erosion is a process where the top soil layer is washed away because of the effects of water or wind. An agricultural area

abruzzese [7]

Answer:

add plants and trees

Explanation:

they help hold the soil in place because of their roots

8 0

3 years ago

The data obtained from the meselson–stahl experiment after one generation of replication eliminated the dispersive model of dna

Sedaia [141]

<h2>Given statement is false</h2>

Explanation:

According to dispersive model of DNA replication,DNA molecules are hybrids of parental and daughter DNA;In this model each individual strand is a combination of original and new DNA

Meselson and Stahl did an experiment on DNA replication using E.coli bacteria

E.coli was grown in a medium containing heavy isotope of nitrogen,bacteria took up the nitrogen and used to synthesize new biological molecules,including DNA
It was grown for many generations,the nitrogenous bases of the bacteria's DNA were all labelled with heavy nitrogen
Bacteria were then switched to light nitrogen isotope and allowed to grow for several generations
They then measured the density of the DNA using density gradient centrifugation
This method separates molecules such as DNA into bands by spinning them at high speeds in the presence of another molecule, such as cesium chloride
Each DNA produced two DNA molecules each with one new strand and one old strand called semi conservative replication(half of the parental DNA conserved in daughter DNA)
Each DNA strand act as a template for synthesis of new strand
Hence,dispersive model of DNA was eliminated and semi-conservative model of DNA replication was proved by the above experiment

3 0

3 years ago

Read 2 more answers

Extra-solar planets are probably composed of which gases? Select all that apply.

kherson [118]

Answer:

Hydrogen and helium.

Explanation:

Extrasolar planets, also called exoplanets are the planets that are placed out of the solar system and it orbits around another star, not the Sun. The planets that are not orbiting around the Sun are made of two easiest elements, and those elements are hydrogen and helium. Extrasolar planets are very strange objects that are not even close to looking like Earth.

6 0

3 years ago

In the Hardy-Weinberg principle, the actual number values of p and q will not change if five specific conditions are being met.

JulsSmile [24]

In the Hardy-Weinberg principle, the values of p and q will not change if evolution is not occurring.

<h3>What is the Hardy-Weinberg principle?</h3>

The Hardy-Weinberg principle is a model used in population genetics to estimate genotypic and allele frequencies in a population.

The Hardy-Weinberg principle states that allele and genotypic frequencies remain constant in absence of evolutionary forces.

These evolutionary forces include nonrandom mating, gene drift, gene flow, mutation and natural selection.

Learn more about the Hardy-Weinberg principle here:

brainly.com/question/3406634

5 0

2 years ago

Earthquakes typically have

timofeeve [1]

The best answer is "foreshocks before the quake and aftershocks after the quake".

These terms are used to characterise the events of an earthquake over time. Foreshocks are small shocks that can occur before the main seismic event. Aftershocks, like foreshocks, are smaller seismic events that can occur after the main seismic event.

4 0

3 years ago