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Aleksandr-060686 [28]
3 years ago
12

Researching the Circulatory System also called the Cardiovascular System.

Biology
1 answer:
marin [14]3 years ago
6 0
Organs: Arteries, Heart, Veins, Capillaries
Function: Transports blood and oxygen from the lungs to various parts of the body
Other systems it interacts with: Respiratory system
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One advantage of using dns assay to detect maltose production is
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The one advantage of using DNS assay to detect maltose production is the formation of a soluble and colored product compound. 
The reaction that occurs between maltose and DNS in the assay is a redox reaction (reduction and oxidation) such that maltose gets oxidized and becomes Maltonic Acid while the DNS gets reduced into reduced DNS. The  intensity of orange/brown /red color of reduced DNS is proportionately related to the amount of Maltose in the solution. 
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3 years ago
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.  

8 0
3 years ago
Earth has a great variety of surface features that are caused by weathering and erosion. Which of the following describes a chan
Sidana [21]

Answer:

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

 

Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away. No rock on Earth is hard enough to resist the forces of weathering and erosion. Together, these processes carved landmarks such as the Grand Canyon, in the U.S. state of Arizona. This massive canyon is 446 kilometers (277 miles) long, as much as 29 kilometers (18 miles) wide, and 1,600 meters (1 mile) deep.

 

Weathering and erosion constantly change the rocky landscape of Earth.

Explanation:

HOPE IT HELPS. PLS MARK AS BRAINLIEST

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What was one belief of the Sumerians<br> A. Purity<br> B. Eternal life <br> C. Love<br> D. Morality
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I think it is eternal life dont trust me too much tho
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Which terms are associated with the conservation of mass? Select all that apply.
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Equal and persevered transformed
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