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vova2212 [387]
3 years ago
5

Explain how the pressure-flow model can result in "two-way" movement of organic molecules in a plant.

Biology
1 answer:
ycow [4]3 years ago
6 0
<span>Sugars are actively loaded into companion cells from photosynthetic cells. This uses a proton/sucrose code transport proteins. This causes the Phloem to become hypertonic leading to the entry of water via osmosis. This increases turgor pressure, propelling the sugars through the plant. Then the sugar enters into the sink cells causing the phloem cells to become hypotonic, causing water to exit.</span>
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Two next-door neighbours use very different strategies when it comes to landscaping their front yards. One neighbour plants a fr
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Explanation:

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Which set of terms describes a realistic cause-effect relationship between solar weather and Earth's magnetosphere? Select the t
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Please select the word from the list that best fits the definition:
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*magnetic reversal

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Does prokaryotes consist of chromosomes?
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In a population of rabbits, there are 496 black rabbits and 27 white rabbits. Fur color is determined by a pair of alleles where
Troyanec [42]

Answer:

0.96

Explanation:

It is given that

B is the dominant allele which represents the black color

and b is the recessive allele which represents the white fur.

B being dominant will result into black color fur for genotype "Bb"

Given -

Frequency of black fur allele (p) is 0.8

As per Hardy Weinberg's  first law of equilibrium

p + q = 1\\

Substituting the value of p in above equation, we get -

q = 1-p\\q = 1-0.8\\q= 0.2

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q^2\\= 0.2^2\\= 0.04

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p^2\\= 0.8^2\\= 0.64

As per Hardy Weinberg's second law of equilibrium -

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Combined frequency of homozygous and heterozygous black fur phenotype is

0.64 + 0.32\\= 0.96

5 0
3 years ago
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