Mutuation is an evolutionary mechanism

Answers

Answer 1
Answer: Mutations indeed are evolutionary mechanisms because through mutations we can experience the different adaptations which might enable us to become more adapted to our nearby environment - however, it's also not necessarily true that these mutations make us more adapted to our environment. 
Answer 2
Answer: Mutation is an evolutionary mechanism - true.
Mutations sometimes help us adapt to the environment.

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Favorable changes in species get passed down through the generations because of
15. Unlike a lytic infection, a lysogenic infection
Each cell only expresses a small portion of its genes at any given time. Not synthesizing unused proteins allows resources and energy to be conserved. This understanding best supports which of the following statements?Cells randomly express different genesGene expression is a regulated processCells cannot express certain genesUnexpressed genes are never useful
How many chambers does the human heart have? one two four six
Which one of the following choices is the first part of the small intestine?a. Duodenum b. Macrodenum c. Jejunum d. Ileum

According to the fossil record, which of these evolved after amphibians? Select two options.mammals
sponges
fish
bacteria
reptiles

the subject is science

Answers

Answer:

The correct answers are Reptiles and Mammals.

Explanation:

I took the test on ed and got it correct

a and e is the answer i have writ more so don't forget to rate pls and thx

Acid rain is a secondary pollutant

Answers

The statement above is TRUE, acid rain is a secondary pollutant.

There are two basic types of pollutants, these are primary and secondary pollutants. The primary pollutants refer to those pollutants that are directly emitted from their sources. Examples are ammonia and carbon monoxide. Secondary pollutants on the other hand refer to those pollutants that are formed from the reaction of primary pollutants in the atmosphere. An example of secondary pollutant is acid rain, which forms as a result of reaction of sulphur dioxide and nitrogen in the atmosphere.

Final answer:

Acid rain is a secondary pollutant resulting from the reaction between sulfur dioxide and nitrogen oxides, primary pollutants, with water, oxygen, and other substances in the atmosphere. The resulting acid rain has a severe impact on both natural ecosystems and manmade structures. Despite regulations, it continues to be a significant issue in some industrial regions.

Explanation:

Yes, acid rain is indeed a secondary pollutant. It is caused when sulfur dioxide and nitrogen oxides, primary pollutants released from industrial processes and fossil fuel combustion, react with water, oxygen, and other substances in the atmosphere to form sulfuric and nitric acids. These acids then fall to the ground as acid rain. Acid rain is characterized by its acidity, having a pH of less than 5.

Acid rain has been a severe problem in industrial areas, particularly in North America and Europe until the 1980s. The acidity of this rain has led to the destruction of forests, damage to soil, and transformed freshwater lakes into an inhabitable environment for only the most acid-tolerant species. Acid rain also significantly corrodes marble and limestone structures. Regulatory interventions limiting the emission of sulfur and nitrogen oxide have reduced the severity of acid rain, but it remains a growing problem in areas like China and India.

The impact of acid rain on both natural and manmade environments is profound. It not only destroys the natural landscape and aquatic ecosystems but also causes the degradation of buildings and monuments, as seen in the case of the Lincoln Memorial in Washington, DC.

Learn more about Acid Rain here:

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Which of the following features differentiates sporozoans from the other phyla of protozoans?

Answers

Firstwe have to know that sporozoans are a strictly parasitic protozoanthat are usually immobile. Of the following features the one thatdifferentiates protozoans from the other phyla of protozoa is:


Answer:A) Sporozoans lack locomotor organs.


Ihope this helps, Regards.


. Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? a.) One species preys on the other.
b.) The relationship is mutually beneficial.
c.) They share the same niche.
d.) One species benefits, while the other is neither helped nor harmed.

Answers

Answer:

C (they share the same niche)

Explanation:

Competition is a relationship between organisms resulting in a contest when both are trying to use the same resources related to their growth, reproduction and survivability. It is as a result of limited resources. Competition occurs in virtually all ecosystems in nature. This relationship develops when more than one organism in an environment has the same need for resources (niche) as another, to survive.

Each organism has a specific place in the ecosystem called NICHE. A species' niche is basically its ecological role or the function to which it is especially suited, which is defined by the set of conditions, resources and interactions it needs or can use.

The competitive exclusion principle says that two species can't coexist if they occupy exactly the same niche (competing for identical resources) or to put it in another way, two species in an ecosystem are bound to compete when they share the same niche (need for resources).

A DNA segment is changed from -AATTAG- to -AAATAG-. This is a_______.

Answers

the answer coule be deletion or a mutation

Why does a cell need to copy its DNA before it divides? A) so both new cell have enough DNA
B) so the sister chromatids don’t have to get separated
C) so it has a different set of instructions

Answers

Answer:

A

Explanation:

It can't be B because during mitosis, sister chromatids inevitably are separated. It can't be C because they are copied so they have the same instructions and know what to do. A is the best choice.

Answer:

the correct answer is a and the proper name for this process is called DNA replication thx so much