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Anton [14]
2 years ago
13

Which of the following conclusions can be made based on the observed fact that stem cells can differentiate into any kind of cel

l in the human body
A. all cells can mutate into different forms when exposed to external conditions
B. Dna contains all the instructions necessary to build every kind of cell
C. Stem cells can only differentiate into specialized cells when exposed to internal conditions.
D. none of these
Biology
1 answer:
Hatshy [7]2 years ago
7 0

Answer:

a

Explanation:

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For sucrose to be moved from a leaf (source) cell to a root (sink) cell, sucrose is first actively transported into the phloem f
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Answer:water diffuses into the phloem from the xylem and sucrose moves to the sink

Explanation:Translocation is the movement of ready produced food substances from the site of production to places in the plant where food is needed. such as the roots.the place where food is produced is called the source, the the place where food is used up is called the sink.the leaves are the source in a plant.photsoynthates, which is the plant manufactired food, may move up and down the stem ,majorly to areas of storage and growth.

Surose is the major intermediate product of photosynthesis.it is the form in which sugar is transported.it is conducted by the phloem vessels.this takes place in the long sieve elements that forms the sieve tubes

The high percentage of sucrose in the phloem sap causes water to pass into it from the xylem. This then causes the sap to move from source to sink.

At the sink, sucrose diffuses out of the phloem.it is either stored up or used for growth and repairs

4 0
3 years ago
An environmental scientists is least likely to be involved with which of the following?
o-na [289]

Answer:

Probably determining the best way to generate clean energy in Maine :)

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3 years ago
Why cannot a population keep increasing forever in an ecosystem?
Dmitrij [34]
A population cannot continue to increase forever because each population has a carrying capacity, which is the max number of organisms that can live in an environment with the available resources. At some point, each population will hit their carrying capacity when they run out of resources.
8 0
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An important difference between a series and a parallel circuit is that a series circuit cannot have any breaks. A parallel circ
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Yes.

Explanation:

Parallel circuit are those types of circuits in which break in one branch does not prevent the flow of current in the circuit and the current can still flow through another branch because there are more ways through which the current moves to other sources while on the other hand, series circuit refers to those circuits in which break in one branch can prevent the current flow in the circuit and the other sources can't receive current due to broken of the connection.

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