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o-na [289]
3 years ago
8

How is the sun used to make energy, and who uses it? How is that energy transferred to living organisms at different levels of t

he food web/food chain/energy pyramid?
Biology
1 answer:
IceJOKER [234]3 years ago
3 0

Answer: Plants use the sun for photosynthesis to create food for themselves and animals eat plants and in return other animals eat the animal that eat the planets but each time an organism the next receives less energy : plant - 100% - small animal - 80% - large animal - 60%

Explanation:

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What differentiates galaxy groups from clusters?
Arisa [49]

Answer:

it´s <u><em>B</em></u> the answer is B

Explanation:

thats just the answer i think not too sure really but feel free to correct me is you like my dude.

8 0
3 years ago
What is the effect on transcription of the structural and regulatory genes of the lac operon when lactose is present in the envi
vova2212 [387]

In the lac operon, glucose also plays an important role along with lactose. When Lactose is present in the environment along with glucose then it cannot deactivate the regulator gene [repressor], as a result, the repressor will bind to the operator and the transcription will be blocked.

When Lactose is present in the environment without glucose then the Catabolite repressor protein will bind to the CAP Site, and lactose will bind to the repressor [regulatory gene product], as a result, the repressor gets deactivated and the transcription takes place.

Lac operon: It is a set of three structural genes z, y, and a which are all transcribed and regulated under one single promoter. The three genes code for β-galactosidase, lactose permease, and transacetylase respectively.

β-galactosidase is responsible for breaking the lactose into glucose and galactose, lactose permease is responsible for transporting lactose across the cell membrane and transacetylase attaches a particular chemical group to target molecules.

Learn more about Lac operon here

brainly.com/question/1217140

#SPJ4

7 0
2 years ago
Complete the complementary strand of DNA, using the same symbols for phosphates (circles), sugars (pentagons), and bases. Mark t
OleMash [197]

About the question:

You will find the completed strand in the attached files

Answer and Explanation:

First, we need to recognize each strand, the original one and the complementary one. We can recognize the original strand because bases are already given. So,

  • The original strand is the one at the left,
  • The complementary strand is the one at the right.

Now we need to recognize and pair the bases. Names are written with their letters.

Nitrogenated bases that form nucleic acids correspond to purines and pyrimidines. Adenine and guanine derive from purines, while Thymine and Citocine derive from Pyrimidines.  

In the DNA molecule, Adenine (Purine) forms pairs with Timine (Pyrimidine), while Guanine (Purin) pairs with Cytosine. Two hydrogen bonds join the A-T pair, and three hydrogen bonds join the G-C.

Once we drag the base labels to their targets, we need to recognize each of the strain extremes.

One of the extremes has a phosphate group, which is named 5´. The other extreme has a hydroxyl OH named 3´. Both of them are readen in the 5´to 3´ direction. The polymerase enzyme reads the original strand in 5´ to 3´ mode, and the molecule lecture goes from 3´to 5´.

So, by looking at the labels, we will recognize the phosphate extreme and the hydroxyl one. We will place in the superior extreme of the original strain the phosphate group 5´ and in the other extreme the OH 3´. These positions will give us the direction reflected by the arrow. The complementary strand will have the same extreme labels but in opposite places. So first we will place the OH 3´ label in the superior extreme, and the phosphate 5´label in the inferior extreme, defining the direction reflected by the arrow.

4 0
3 years ago
Mark buys 250 shares of stock in a fund with a net asset value of $25.17 and an offer price of $25.30. Mark wants to sell all of
Korvikt [17]

Answer:

B is the answer

Explanation:

I just took the test!

5 0
2 years ago
Cells in the nervous system have a potential difference of 70mV across the cell membrane separating the interior of the cell fro
Alja [10]

Answer:

The correct answer is - yes, The ion pumps can actively separate charge; thus, they can create a potential difference.

Explanation:

Ion channels create a potential difference by providing a path for the flow of current across the membrane. Ion pumps such as Na+/K+ pump create a potential difference across the membrane by separating the charge.

In the sodium-potassium pump the movement of ions across the inside and outside of the membrane by active transport. The concentration difference between the inside of the membrane and outside of the membrane causes a potential difference.

7 0
3 years ago
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