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sineoko [7]
3 years ago
7

As habitats change, populations of northern pine trees that were once separated can now exchange pollen. This exchange of genes

between populations is allowing the previously isolated gene pools to mix. The mechanism of evolution is:___________
Biology
1 answer:
Simora [160]3 years ago
6 0

Answer:

Gene flow

Explanation:

Evolution is the changes seen in the growth, development, features of a certain group of species during the cause of time. Evolution causes changes in the gene frequency of species from one generation to the next generation.

There are 5 important mechanisms of evolution and they are: Gene flow, mutation, genetic drift, natural selection and non random mating.

Gene flow as a mechanism of evolution is the exchange or transfer of genes between a group of species as they move from one place to another. Gene flow can either increase the rate of evolution or decrease it.

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Which event signals the birth of a star?
juin [17]

Answer:

nuclear fusion

Explanation:

When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.

7 0
3 years ago
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Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?
Vedmedyk [2.9K]

Answer:

The correct answer would be bones.

X-rays are high energy electromagnetic waves which have an ability to penetrate most of the biological tissues.

In the X-ray machine, a beam of high energy X-rays is passed through the filters and subject and then fall on the detector or photographic film to produce X-ray.

Dense tissues like bone, teeth, tumors et cetera blocks or stops most of the X-ray particles from reaching the detector or photographic film.

It forms glowing pictures on the X-ray film or photographic film.

The denser the material the brighter the image will be formed on the photographic film.

7 0
3 years ago
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One of the main characteristics of the population is its?
konstantin123 [22]

Answer:

population size, population density, when scientists population spacing and age structure

Explanation:

because because four characteristics is defined a population and i kind of just know.

6 0
3 years ago
Please help me with this it’s due today
uranmaximum [27]

Answer:

The correct answer is - 0 m/s.

Explanation:

In this position-time graph or distance-time graph, there are three different part that shows three different velocities one in increasing as it moves from a lower position in relative to time and one is stationary and the third is decreasing.

'Straight lines' on a distance-time graph suggest that the movement of the object is constant. During 'Part B' of the journey the object travels 0m in 3s. It is stationary for 3 seconds so the velocity will be zero as well.

3 0
3 years ago
What are the two major characteristics that change when air is heated and cooled?
lyudmila [28]
The temperature-dew point spread will increase with heating and decreasing with cooling 
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3 years ago
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