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4 years ago

Why was Pluto classified as not a planet

Biology

2 answers:

Jobisdone [24]4 years ago

4 0

Answer:

the international astronomical union (IAU) downgraded the status of pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet essentially pluto meets all the criteria except one it has not cleared its neighboring region of other objects

ludmilkaskok [199]4 years ago

4 0

Thank you so much for the answer. You are awesome. Awesome is what you are. Are you awesome? That’s a rhetorical question cause you are really awesome and that is a fact. Thank you for being so awesome

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How is ADP converted to ATP?

Phantasy [73]

Answer: by the addition of one phosphate group

Explanation:

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4 years ago

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Why can't both strands of DNA be replicated at the same time?

saw5 [17]

Answer: DNA is a molecule made up of two strands, twisted around each other in a double helix shape. The two strands are complementary which have a 5 prime end and a 3 prime end. To understand this question you must first understand the steps that follow.

DNA Replication:

Step one: 

DNA Helicase (unzips) separates the strands.

Step two:

DNA Primase starts the process and makes a small piece of RNA called a primer. This marks the starting point for the DNA.

Step three:

DNA Polymerase binds to the primer and will make the new strand of DNA. DNA Polymerase can only add DNA bases in one direction, from the 5 prime end to the 3 prime end.

The leading strand is made continuously.
The lagging strand does not run continuously because it runs in the opposite direction. Each fragment is started with an RNA primer. DNA Polymerase then adds a short row of DNA bases from the 5 prime to 3 prime direction. This results in okazaki fragments because it can only replicate in small chunks. The process is repeated.

Step four:

Once the new DNA is complete the enzyme exonuclease removes all the RNA primers from both strands of DNA.

Step five:

Another DNA Polymerase fills in the gaps that are left behind with DNA.

Step six:

DNA Ligase seals up the fragments in DNA, in both strands to make a continuous double strand.

Final answer:

DNA Replication cannot replicate at the same time due to the leading and lagging strand.

Good luck!

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3 years ago

In pea plants, flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production

Hoochie [10]

Answer:

7/16

Explanation:

The proportion of the offspring from the cross that will have white flowers is 7/16.

The presence of anthocyanin which determines purple coloration is conditioned by the C_ and P_ alleles. It means that the absence of one or both of C and P will result in white flowers.

Two plants, each with CcPp are crossed:

CcPp x CcPp

Offpring

1 CCPP - purple

2 CCPp - purple

2 CcPP - purple

4 CcPp - purple

2 Ccpp - white

1 CCpp - white

1 ccPP - white

2 ccPp - white

1 ccpp - white

Proportion of offspring with white flowers = 7/16

Proportion of offspring with purple flower = 9/16

See the attached image for the Punnet's square analysis of the cross.

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3 years ago

According to the world cancer research fund and the american institute for cancer research, what fraction of all cancers could b

Wittaler [7]

The answer would be 4 out of 10 which is 40 percent

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3 years ago

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OXYGEN/CARBON/GLUCOSE

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