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Elena-2011 [213]
3 years ago
14

Why is xylem known as a dead tissue

Biology
1 answer:
IgorLugansk [536]3 years ago
4 0
Because it’s main organelles are missing
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In what era did the plants begin to flourish?
Juliette [100K]

Answer: Paleozoic

Explanation: The Paleozoic Era, which ran from about 542 million years ago to 251 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the formation of another plants became widespread. And the first vertebrate animals colonized land.

6 0
3 years ago
Which of the diagrams shows red blood cells in 0.0 M Solution​
Julli [10]

The rigth answer is the picture 4.

In the case of a hypotonic extracellular medium, there will be a large inflow of water to dilute the Na, thereby increasing the cell volume and there will be an explosion of the membrane in places so hemolysis, the contents of the red cell ( Hemoglobin) is released into the blood plasma.

On the other hand, in the case where the extracellular medium is hypertonic, therefore archi concentrated, well it will be the water of the red cell that will come out without damaging the membrane, we will rather have a red cell that is completely flat and non-functional without release. erythrocyte (Hb) content.

3 0
2 years ago
A client whose parkinson's disease is being treated with tolcapone should concurrently take what drug?
steposvetlana [31]

Answer:

The correct answer would be levodopa/carbidopa.

Tolcapone is a drug used as an adjunct to levodopa/carbidopa combination medication.

These drugs are used to treat the symptoms of Parkinson's disease.

Tolcapone is used to inhibit enzyme COMT (catechol-O-methyl transferase).

In the brain, levodopa is converted into dopamine which helps in controlling the movement.

Carbidopa helps in preventing the breakdown of levodopa in the blood which allows more levodopa to enter the brain. In addition, it helps in reducing the side-effects associated with levodopa such as vomiting, nausea et cetera.

6 0
3 years ago
A novel multicellular organism has been discovered whose natural habitat is a barren desert with limited water and nutrients. Th
STatiana [176]

Answer:

The correct answer will be- sexual reproduction

Explanation:

An organism can reproduce by either of two ways of reproduction called asexual reproduction and sexual reproduction.

Both modes of reproduction prove beneficial to the organism but based on the environmental condition, the organism use either sexual mode or asexual mode or both.

In the given condition, since the organism has to adapt and evolve in response to the desert conditions which requires changes in the DNA sequences which can take place only during the mechanism of sexual reproduction like crossing over or genetic recombination, therefore, sexual reproduction is the correct answer.

6 0
3 years ago
A white-eyed female Drosophila is crossed with a red-eyed male Drosophila. Which statement below correctly describes the results
Sophie [7]

Answer:

I think that 50-50% chance

Explanation:

7 0
2 years ago
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