Photochemical smog tends to form over

What food security challenge currently facing your community?<br>

Lilit [14]

"What food security challenge currently facing your community?"

Answer:

The report identified a multitude of food-security problems including hunger, obesity, malnutrition, low crop yields, inadequate food storage, poor sanitation, and related political instability.

4 0

3 years ago

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Natural selection and genetic drift are two mechanisms of evolution that can lead to speciation. Define both natural selection a

timofeeve [1]

<h2>Evolution </h2>

Explanation:

Genetic drift

Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events
The genetic drift occurs due to random fluctuation of any allele in a gene pool and is more efficient in small population
The founder effect and the bottleneck effect are cases in which a small population is formed from a larger population which means they may experience strong drift for generations
In founder effect a genotype from a homogeneous gene pool migrate to a newer habitat and colonize there and form a newer community which leads to the genetic drift to the original population, speciation which occurs in this effect is the peripatric speciation
In bottleneck effect the elimination of inferior genotype from a homogeneous gene pool occurs due to the strong selection pressure and changing environmental conditions which leads to genetic drift and a only a few most adapted genotype survives and flourish

Natural Selection

Natural selection is a selection pressure which operates in a population and allow the best fitted genotype to survive in changing environmental conditions and eliminate the other genotype which are not fit
Genetic drift, mutation and sexual selection are important causes of natural selection
Directional natural selection favours the superior genotype and eliminate the inferior and intermediate genotype, in the history of evolution the most common natural selection is directional natural selection
Stabilizing natural selection favours the intermediate genotype but eliminates the extreme genotype
Bidirectional natural selection favours the extreme genotypes but eliminate the intermediate genotypes

5 0

3 years ago

1. Explain how primate hand features increase fitness and give one example. When writing about your example name the hand featur

Maslowich

Answer:

1. Opposable thumbs are one of the characteristics of the primates that enhances their fitness. The thickest digit found in the hand is the thumbs that possess the tendency to rotate and move in distinct orientations in comparison to other digits. This makes the primates possess the tendency to hold the objects with the help of their hands in comparison to other animals that can only hold objects like food with the help of their mouth.

2. In case, if a primate infant fails to possess opposable thumbs, then it would become much tougher for him or her to pick the objects. With practice and time, the individuals would develop the habit of holding things with the help of other digits of the hand, however, the grasping power will not be that much or it can be said that such individuals would fail to exhibit strong grasping power.

5 0

3 years ago

How are rocks and minerals related?

Genrish500 [490]

b is the answer

hope this helps

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4 years ago

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Which statement describes one way in which global winds effect weather and climate

Blizzard [7]

Global winds shape the Earth's climate by transporting heat and water vapor. They are caused by air pressure and moisture differences in the atmosphere from warm air rising to the poles.

4 0

4 years ago