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kolbaska11 [484]
3 years ago
7

What is natural selection?

Biology
2 answers:
Helen [10]3 years ago
8 0
"Natural selection<span> is the differential survival and reproduction of individuals due to differences in </span>phenotype<span>. It is a key mechanism of </span>evolution<span>, it is a change of </span>heritable traits<span> in a </span>population<span> over time"</span>
11Alexandr11 [23.1K]3 years ago
6 0
Natural selection is a theory popularized by Charles Darwin. It's a key mechanism of evolution. When a gene or an aspect of an organisms dna isn't up to par with the environment, it starts to change over time. Over time this can result in various groups being much more adapted to a specific environment. It is considered the leading proof for adaptive evolution. An example would be, if there was a population of green bugs and red bugs. The birds in this area were more attracted to the red bugs than the green bugs. Natural selection may take place and the species would the red bugs would get cut out as generations went on and in time, there would be mostly or only green bugs.
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What does the Miller-Urey experiment tell us about the origin of life?
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Answer:

B inorganic materials can form organic molecules under the right conditions

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Common examples include carbon, sulfur, oxygen, iron, copper, aluminium. Elements are represented by symbols. Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.

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Substances can be categorised as either elements or compounds. Both of these are made up of atoms, the only difference is an element is made of one type of atom whereas compounds are made of two or more different types of atoms.

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Which predator is typically found in Central Africa (but occasionally at geocode 34.043021, -118.2668356) and slays its opponent
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The answer is a black mamba.

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3 years ago
4. The water cycle is balanced because
Sergeu [11.5K]

Answer:

hello!

Explanation:

The water cycle is critical not only to weather, but to life on earth.  Rain is necessary for the survival of plants and humans.  

Condensation is necessary for cloud formation.  Evaporation is necessary to cooling and keeping a good balance of water vapor in the air.

The water on Earth now is the same water that’s been on Earth since the beginning.  

What makes that feat possible?  The water cycle.  The water cycle is the process that re-circulates water so we can have bodies of water as well as clouds and precipitation.

The first step of the water cycle is evaporation. About 85% of the water vapor in the air comes from water that evaporated from the oceans.  The other 15% comes from evapotranspiration, which is a catch-all term for water that evaporates from over land.  

This includes water vapor produced by plants during transpiration, water from lakes, streams, puddles and soil moisture, direct evaporation of snow and even water vapor from the breath of animals.  

The second step of the water cycle is condensation. Now that the atmosphere is full of water vapor, that water vapor condenses into water droplets.  Sometimes, like early in the morning, the water vapor condenses on the grass as dew and seeps back into the soil, ready to be evaporated again.  

But most of the water vapor condenses higher up in the air and forms clouds. Once the water droplets are in a cloud, two things can happen.  Either the cloud will dissipate and the water droplets will become vapor again, or the cloud will grow and it will begin to precipitate.

The third and final step of the water cycle is precipitation. Precipitation includes all water that falls from the sky, both in liquid and frozen form, which reaches the ground.  

Once the precipitation makes its way to the ground it can end up soaking into the ground, run off into streams and lakes, become snow cover, be used by plants, be inhaled by animals or fall directly back into the ocean. Then the water cycle can begin again and continue for millions of years to come.

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Answer:

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