A limiting factor is anything that constrains a population's size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources. Others are abiotic, like space, temperature, altitude, and amount of sunlight available in an environment. Limiting factors are usually expressed as a lack of a particular resource. For example, if there are not enough prey animals in a forest to feed a large population of predators, then food becomes a limiting factor. Likewise, if there is not enough space in a pond for a large number of fish, then space becomes a limiting factor.
Answer:
Since there are many factors that can produce a mutation, the event that would be most likely to cause a mutation is a nucleotide is inserted into a DNA strand.
Explanation:
A genetic mutation involves an alteration of the DNA that leads to a defect in protein synthesis and a structural or functional alteration of an individual.
Of all the factors that can produce a mutation, the insertion of one or two nucleotides into the DNA strand produces a point mutation, or molecular mutation, of the insertion type.
<em> The other options are not correct because the processes of </em><em><u>mRNA traveling out of the nucleus</u></em><em>, </em><em><u>mRNA releasing from the DNA strand</u></em><em> or </em><em><u>enzymatic transcription of mRNA</u></em><em> in the nucleus can carry over a mutation produced in the DNA, but they are not mutation-producing factors.</em>
Answer:
Enzymes are proteins that bind to a molecule, to modify it and lower the energy required to make it react. ( In other words , enzymes are biological catalysts.
Catalysts lower the activation energy for reactions.
In simple terms , The lower the activation energy for a reaction, the faster the rate. )
The activation energy is the energy needed to start a reaction.
Explanation:
Thus enzymes speed up reactions by lowering activation energy.
Answer:
D) the frequency of rainfall needed for the germination of desert plant seeds
Explanation:
When we talk about abiotic factors, we refer to the non-living factors. The abiotic components of an ecosystem include: Water, air, temperature, light, and the like.
So if we consider it as a limiting factor to population size, this should be the cause of the limitation.
Among all the choices, only D, shows an abiotic factor being the cause of population limiting. Rainfall is an abiotic factor (water), which influences the germination of desert plant seeds, specifically, it depends on the frequency of rainfall.
