What is the usefulness of categorizing Earth's history into the geologic time scale?

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lana66690 [7]

Answer:

A living organism's position in the flow of energy through an ecosystem.

7 0

3 years ago

List five conditions that can disrupt genetic equilibrium and cause evolution to occur

Colt1911 [192]

1. Non random mating
In genetic equilibrium individuals must mate at random. However, in many species, individuals select mates based on heritable traits, such as size, strength, or coloration, a practice known as sexual selection.

2. Small population size
Genetic drift does not have major effects on large populations but can affect small populations. Thus evolutionary change due to genetic drift happens more easily in small populations.

3. Immigration or Emigration
Individuals who join a populations may introduce new alleles into the gene pool. Likewise individuals who leave may remove alleles from the gene pool. Any movement of individuals into (immigration) or out of (emigration) a population can disrupt genetic equilibrium, a process know as gene flow.

4. Mutations
Individuals who join a populations may introduce new alleles into the gene pool. Likewise individuals who leave may remove alleles from the gene pool. Any movement of individuals into (immigration) or out of (emigration) a population can disrupt genetic equilibrium, a process know as gene flow.

5. Natural Selection
if different genotypes have different fitness, genetic equilibrium will be disrupted, and evolution will occur.

6 0

3 years ago

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Fudgin [204]

Atmospheric pressure is an indicator of weather. When a low-pressure system moves into an area, it usually leads to cloudiness, wind, and precipitation. High-pressure systems usually lead to fair, calm weather

6 0

2 years ago

What is the single source of both electrons used by AND the oxygen created by photosynthesis? During which part of the process d

Airida [17]

Water is the single source as it provides the electrons by splitting into oxygen and hydrogen. This process happens during the light-dependent reactions.

7 0

1 year ago

Ocean acidification impacts are: 1. 2. 3. 4.

____ [38]

Explanation:

In the 200-plus years since the industrial revolution began,concentration of carbon dioxide in the atmosphere has increased due to human actions.During this time,the pH of surface ocean waters has fallen by 0.1 pH units.This might not sound like much,but the pH scale is logarithmic,so this change represents approximately a 30 percent increase in acidility.

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6 0

2 years ago