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Lina20 [59]
3 years ago
7

What is the ultimate source of genetic variability?

Biology
1 answer:
Zepler [3.9K]3 years ago
3 0
The ultimate source is mutation.It is the only way that new alleles and genes are created.
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Which step in the scientific method is next after collecting data?
loris [4]
A, I believe. Because after collecting you need to analyze in order to do many other steps. Also all the other answers are something before collecting data
4 0
3 years ago
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What would be the correct sequencing of DNA to match A, T, T, G, C
Marianna [84]

Answer:

A.

Explanation:

The correct sequencing of DNA nucleotides to match A, T, T, G, C is T, A, A, C, G because the nucleotide matches are: Adenine-Thymine, and Guanine-Cytosine. This works both ways, A-T or T-A, and G-C or C-G. The correct sequence therefore is A.

3 0
3 years ago
which of the following steps is an important part of the process by which energy guides human to a sustainable future A) behavio
Tom [10]
Let's think of it like this.  We have an energy crisis, but how can we solve it?  There are three steps.  First, we need to recognize that we HAVE a problem that needs to be fixed.  Then, we need to determine what's causing the problem.  Finally, we need to change how we act in order to solve the problem.  Now, let's look at the options.

Is A correct, leaving our behavior unchanged?  NO: if we know the cause of the problem, we still need to solve it!  What about B: the problems are ignored?  NO: you can't solve a problem unless you know it's a problem.  C?  NO: to solve a problem, you need to find out what's causing it.  Finally, let's look at D: behavior is changed after cause is identified.  This is correct: not only do we know why it's happening, but we're fixing it!

Answer: D
8 0
3 years ago
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What does a pyramid of biomass represent? A. Range of food webs found in one trophic level B. Percentage of energy that's passed
Klio2033 [76]

The pyramid of biomass represents a range of food webs found in one trophic level

A pyramid of biomass refers to graphical representation of biomass that is present per unit area of all the various trophic levels of the ecosystem.

<h2>Further Explanation</h2>

The graphical representation shows the relationship between biomass and trophic level that quantify the biomass that is present in each trophic level of energy community at a given period of time.

There are two types of pyramid of biomass, they include

  • Inverted pyramid of biomass  
  • The upright pyramid of biomass  

Inverted pyramid of biomass: a very good example of inverted pyramid can be seen in a case of pond ecosystem, where major producers in the ecosystem (mass of phytoplankton) will be lower than the mass of heterotrophs, such as insects.  

The upright pyramid: The first thing on the upright pyramid is the producers, such as plants. The plants are present at the bottom level of the pyramid and followed by consumers.

Within the pyramid, the highest level is occupied by the carnivores; they are the lowest quantified amount of biomass. In upright pyramid the total weight of the producers is far more than when the weights of all the consumers are combined.  

However, the main issues with the pyramid of biomass are that every trophic level of the pyramid seems to have more energy than it does.

LEARN MORE:

  • pyramid of biomass brainly.com/question/12655542

KEYWORDS:

  • pyramid of biomass
  • trophic level
  • consumers
  • graphical representation
  • ecosystem
8 0
3 years ago
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If you sort your results by relevance, what will be at the top of the results list?
Lina20 [59]
<span>Actually the information or data in the catalog DB or data base connection takes place by relevance and then mainly here we get the search string or required data which we want or entered, with clear exact search filters which has been directly chosen, and hence these will be at the top of the results list for sure.</span>
3 0
3 years ago
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