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Elena L [17]
3 years ago
15

The percentage of germination of lettuce seeds exposed to far-red light, then blue light, and then red light compared to lettuce

seeds that were exposed to far-red light only would be expected to be ____________________ .
Biology
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

<u>50%</u>

Explanation:

<em>Since</em> it was not a case of a Lettuce seed exposed first to <em>red light</em> and then to <em>far-red light</em> which will very likely not germinate because Pr (chromoprotein inactive form) absorbs red light efficiently, the light absorbed will convert a high proportion of the molecules to the Pfr (chromoprotein active form), thereby inducing germination. So there is a 50/50 percentage chance of of germination.

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In the Florida map shown below, use the law of superposition to determine which rocks are oldest? Map of Florida identifying fou
tatiyna

Answer:

The answer is A

Explanation:

You can tell that rocks are older or younger depending on if other layers overlap. B is the oldest because all the others cover it, C is the second youngest because D and A overlap it. From what I could tell, when I took the test, it was either A or D, neither overlap each other so I was not sure so I guessed A and got it right. Though it could be looked at that A is smaller than D since its still growing and building.  

3 0
2 years ago
Which term refers to fibrous connective tissues that connect bone to bone and provide static and dynamic stability as well as in
Tom [10]

Answer:

Ligament

Explanation:

The ligament is a primary connective tissue which connects one bone to another bone in the skeletal system of humans. The ligaments are present is the ankles, knee, elbows and shoulders and in other joints.

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Thus, Ligament is the correct answer.

5 0
3 years ago
Read 2 more answers
In this lab, we'll be using PCR to make many copies of a small region of your personal DNA genome. It is a very bad idea to touc
Luden [163]
Sounds like a trick question.

Maybe not. contamination is easy, but gloves are a barrier between other organic material on yourself (such as what you ate for lunch) and what you are testing.

Other than the fact your DNA will be different than another person’s DNA, if we assume you are theoretically free of debris of any kind, then your DNA would test the same always.

Note: any contamination after purifying extract for a small sequence can give false positives. There are repeat sequences possible that would interfere if you are testing a small enough sequence.

I hope that helps!
4 0
3 years ago
Why has electricity increased so much over the past 20 years
m_a_m_a [10]

Answer:

It’s been more than two decades since Britain’s retail electricity market was opened to full competition in 1999. Before that, retail supply was provided by state-owned entities with regional monopolies. Today, all consumers, including households and businesses, are able to “shop around” for their electricity, switching to a different supplier or tariff to take advantage of better prices and services.

In principle, that is exactly what liberalised retail markets are supposed to provide: greater consumer choice and protections. But that’s only the case if it’s easy for consumers to switch suppliers and for new suppliers to enter the market. That’s how markets are supposed to stay competitive to deliver low prices and a high quality of service. That was the great hope of electricity policy in 1999, but after two decades, there’s little to celebrate.

To enhance competition, smaller suppliers have been exempt from contributing towards the cost of decarbonisation policies. Known as “the threshold obligation”, this encouraged the entry of smaller companies into Britain’s retail electricity market, but the increase from six suppliers in 1999 to more than 70 in 2019 came at a cost. Many new suppliers have gone bankrupt due to unsustainable business models, resulting in consumers footing unpaid industry bills

7 0
2 years ago
Proteins are also known as_______ or _______ chains
MrMuchimi
The amino acids in a polypeptide chain are linked by peptide bonds. Once linked in the protein chain, an individual amino acid is called a residue, and the linked series of carbon, nitrogen, and oxygen atomsare known as the main chain or protein backbone.
8 0
3 years ago
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