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3 years ago

9. a) How does hydrogen bonding help the transport of water in plants?

Biology

1 answer:

grigory [225]3 years ago

6 0

Answer:

Water has a high Cohesion because of Hydrogen bonding. This is important as transport of water in the Xylem in plants relies on water being pulled up. Cohesion also gives the water a high surface tension, allowing small organisms, such as Pond Skaters, to walk along it.

Explanation:

Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.

Plants obtain the hydrogen they need from water molecules. Don't try to feed your plant hydrogen gas -- your plant wouldn't know what to do with it if you did. As long as they have water, plants can readily obtain all the hydrogen they need. :)

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Which of the following statements is true of cyclin-dependent kinases? O O O O O They regulate the cell cycle by phosphorylating

jekas [21]

Answer:

They regulate the cell cycle by phosphorylating other proteins

Explanation:

they are serine-threonine kinases, they play an important role in the phosphorylation of other proteins. Cyclin-CDK complexes phosphorylate substrates appropriate for a particular cell cycle phase and without that, the cycle cannot continue.

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3 years ago

What is the red chicken's genotype?

Sedaia [141]

If red is recessive rr

If red is dominant it could be RR or Rr

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3 years ago

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agasfer [191]

Answer:

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3 years ago

Edward Jenner's smallpox inoculation experiment was based on his observation that some dairymaids who worked

mariarad [96]

From anecdotes he heard, Edward Jenner came up with the premise and conclusion that dairy maids could not get small pox because they had previously been exposed to the virus.

<h3>What was conclusion of Edward jenner in case of small pox?</h3>

He also came to the conclusion that small pox may be passed from one person to the next. Edward Jenner came to this conclusion based on stories he had heard about dairy maids being immune to smallpox.

In 1736, Edward Jenner met Sarah Nelms, a young dairy girl with small pox lesions. Edward Jenner then vaccinated an 8-year-old kid named James Phipps with material from Nelms' small pox lesion. James Phipps suffered a fever and became unwell, but he recovered completely after ten days.

Jenner infected the same boy with materials from a fresh small pox lesion a month later. There was no sickness in the boy.

When Edward Jenner was inoculated/vaccinated with matter from a small pox lesion, he came to the conclusion that he could acquire total protection from small pox.

For more information regarding small pox, visit:

brainly.com/question/15524204

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2 years ago

What is the term for the nucleotide sequences that are removed during mrna processing?

Ne4ueva [31]

The correct answer is: introns

Processing of mRNA is process that occurs only in eukaryotic cells. After the transcription, newly formed mRNA molecule is called and it must be processed into a messenger RNA (mRNA). Processing includes:

• Addition of a 5' cap to the beginning of the RNA

• Polyadenilation- addition of a poly-A tail (tail of A nucleotides) to the end of the RNA

• Splicing- removal of introns and linking the exons

After these steps mRNA is mature and used for the further steps (e.g. translation).

Sometimes some genes are alternatively spliced.

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3 years ago