What is turgor pressure and why is it important

1 answer:

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Turgor pressure is the water pressure inside plant cells. This is maintained by osmosis, which is the movement of water across a <span>different permeable membrane from a place where water concentration is higher to one where the concentration is lower.

Turgor pressure is important because it is what helps a plant stand upright and maintain the plant's structure.</span>

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Levene made which contribution to our understanding of DNA structure? a. He determined that the nucleus contains DNA. b. He dete

Stels [109]

Answer:

The correct answer is b. He determined that DNA contains four nitrogenous bases.

Explanation:

Levene was an American biochemist who studied the structure of DNA in the early 1900s and in 1920 he found that DNA consists of four nitrogenous bases that are Adenine, Guanine, Thymine, Cytosine.

He also found deoxyribose sugar and phosphate group and said that nucleotide is the basic unit of DNA which contains a ribose sugar with attached nitrogenous base and phosphate group.

He also concludes that an equal amount of adenine, guanine, thymine, and cytosine makes the DNA which is now known as tetranucleotide hypothesis. So the correct answer is b. He determined that DNA contains four nitrogenous bases.

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3 years ago

Dendrite is to axon what ________ is to ________. A) receiving; sending B) sending; receiving C) reuptake; action potential D) a

svlad2 [7]

Answer: Option A) receiving; sending

Explanation:

The neuron is made up of many parts, they include:

- dendrites, which are branched and helps in receiving impulses from the adjacent neuron

- axon, a long and extended portion of the neuron that the transmission of impulses along its length away from the cell body.

- synapse etc

Thus, dendrites of neurons is involved in receiving impulses into the neuron, while axons is involved in sending impulses away from the neurons

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