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3 years ago

How does the amount of uranium in zircon tell us how old the crystal is?

Biology

1 answer:

Aleks04 [339]3 years ago

5 0

Uranium- lead which is the oldest & one of the most refined of the radiometric dating schemes

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On which cell types do antibodies exist as transmembrane proteins?

Kamila [148]

I believe that on the Naive B-cell the antibodies exist as transmembrane proteins. A naive b-cell is a type of b-cell that has not been exposed to an antigen. When exposed it becomes either a memory B cell or a plasma cell that secrete antibodies specific to the antigen that was originally bound.

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3 years ago

Hi please help i’ll give brainliest

Sliva [168]

Answer:

2nd one

Explanation:

Regardless of latitude or time of year, the sun's angle reaches closest to 90 degrees (perpendicular lines are 90 degrees) -- and is therefore at its most intense -- at the midpoint of the day: noon.

5 0

2 years ago

Read 2 more answers

Translation ends when

Y_Kistochka [10]

Translation

Remember that transcription happens in the nucleus as it changes from DNA to mRNA. In translation,
the mRNA first has to leave the nucleus and go into the cytoplasm of the cell. The process of translation actually occurs in the cell’s ribosomes.

The process of translation uses the genetic code on the mRNA strand to direct the construction (making) of a protein molecule. 
1. A ribosome attaches to an mRNA molecule in the cytoplasm.
2. As each codon passes through the ribosome, tRNA molecules bring the matching amino acids into the ribosome. Each tRNA has a set of 3 unpaired nitrogenous bases called an anticodon which matches up with the codon coming through the ribosome. So one end of a tRNA has an anticodon and the other end carries the amino acid which is how the code is translated.
3. The ribosome and the rRNA molecules it contains attach the amino acids together as they are being translated. The protein chain will keep growing until the ribosome reaches the stop codon on the mRNA. At that point, translation is done and the ribosome lets go.

Hope this helps!!!

6 0

2 years ago

What list describes the diet of a carnivore? Mice and rabbits Fish and berries Fish and grass Rabbits and grass.

Eduardwww [97]

Answer:

Mice and Rabbits

Explanation:

the other ones would be for omnivores

8 0

2 years ago

Find the mean, median, and mode of the following list of values. Round to the nearest tenth if necessary.

grin007 [14]

Answer:

D.

Mean: 24.8

Median: 26

Mode: 26

Explanation:

The mean is the average. To find the average, add up all the numbers and divide by the amount of numbers there are.

30 + 26 + 25 + 11 + 34 + 20 + 26 + 26 = 198

Now, we divide by how many numbers we started out with (8).

198 divided by 8 = 24.75, rounded would be 24.8

To find the median, you arrange the numbers from smallest to largest, and find the middle number like this:

11, 20, 25, 26, 26, 26, 30, 34

As you can see, the middle number is 26.

To find the mode, you arrange the number from smallest to largest, and find the number that appears more often.

11, 20, 25, 26, 26, 26, 30, 34

As you can see, the number 26 appears the most often.

So, we end up with:

Mean: 24.8

Median: 26

Mode: 26

3 0

2 years ago