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mixas84 [53]
3 years ago
6

I need help on a science question

Biology
1 answer:
nikitadnepr [17]3 years ago
5 0
Yes, cyanobacteria should be correct. They were the first organisms known to be alive.
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Pretend that you are writing a letter to the president proposing ways that the US can reduce its contribution to climate change.
ahrayia [7]

Answer:

Dear Mr. President,

Your strong voice has called attention to the risks of human-induced climate change and the need to take timely and effective steps to address it. We are pleased to report further progress in our efforts to advise you on climate policy options that could help encourage these steps.

- (Explain what you learned in class today ) I don't know what you were taught in class so you have to figure what to put here.  

Mr. President, our temperatures are consistently rising while moisture is increasingly evaporating. Forest management is merely one piece of the puzzle — something our own firefighters would be quick to remind you. Since 2009, our state has spent more than $130 million on forest health and fire preparedness. These events still overwhelm our residents and resources, because these fires are unlike anything people have seen before.

Sincerely,

Explanation:

hope this helps!

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Which of the following was NOT a change in the ecosystem as a result of the wolves killing coyotes?
sergij07 [2.7K]

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If you cut a tree trunk into pieces, the resulting pieces and dust add up to the same mass as the original trunk. This is a demo
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The law of conservation of mass

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In order to carry out the testcross, you should cross your original pea plant with another pea plant whose phenotype is ________
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<span>My pea plant has an unknown genotype for flowers, whether it has two dominant traits for white flowers (WW) or one dominant and one recessive (Ww) leading to white flowers; therefore I am doing a testcross in order to determine the genotype of my pea plant. The best plant to do this with is one that has a phenotype of purple flowers (ww) - that is, it is homozygous for the recessive trait. If I use a homozygous recessive plant, I know exactly what its genotype is. I don't have to worry about whether it's got one or two dominant alleles; I know that at least half of my alleles are going to be the recessive w. This makes identifying the offspring's genotype very simple. If I find that the offspring have at least some purple flowers among them, I know that my original plant had to be Ww; that is it had to have one dominant and one recessive allele for the flower color gene. If, however, all of the offspring are white flowers, I know that my original pea plant had both dominant alleles (WW).</span>
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3 years ago
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