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fomenos
2 years ago
13

How is sucrose moved in sink?

Biology
1 answer:
Dvinal [7]2 years ago
4 0

The sucrose moved in sink by active transport.

<h3>What is active transport?</h3>

Active transport is a type of transport in which the cell expends energy to move solutes against their concentration gradients. The sodium-potassium pump is an example of active transport. Active transport differs from passive transport in that the cell does not expend energy.

In this case, the sucrose moves from companion cells in sink elements by active transport. This reduces the water potential of the sink element  by osmosis, which increases the hydrostatic pressure.

See more about sucrose at brainly.com/question/24214907

#SPJ12

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4 0
3 years ago
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Imagine a genetic counselor working with a couple who have just had a child who is suffering from Tay-Sachs disease. Neither par
Alexxx [7]

Answer:

C. "Because you have had one child with Tay-Sachs, you must each carry the allele. Any child you have has a 25% chance of having the disease

Explanation:

Tay-Sachs disease is an autosomal recessive disorder that means a child will acquire the phenotype or we can say disease only when both the alleles which cause disease are present in the child.

Here, in this condition neither parent has Tay-Sachs but they gave birth to a child who is suffering from the disease then it simply means that both the parents are carrier of this disease i.e. they both are heterozygous.

The cross and probability of healthy and diseased child is shown as under:

                          Mother        Father

Parents                    Tt               Tt

                              /        |          |     \

Off-springs         TT      Tt       Tt      tt

<u>Out of these 4 probable off-springs only 3 with genotype TT, Tt & Tt  will be healthy while the 1 with genotype tt will be diseased.</u><u> </u><u>So, the probability of diseased child is 1/4 which is 25%. </u>

Also, the birth of children is an independent event so if one child has already been born with this disease then it doesn't mean that the next 3 children will be healthy for sure i.e. birth of first child cannot influence the next child. In short we can also say that in the next birth, there is still 25% chance of the child being born with this disease because previous birth has nothing to do with next birth.

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Answer:

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