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Savatey [412]
3 years ago
12

A forensic scientist finds a single skin cell from saliva on a cigarette butt left in a room where a murder has just occurred. W

hat process might he or she utilized to accumulate enough DNA to determine who left the cigarette at the scene of the crime?
A. Genetic engineering

B. Gene therapy

C. Gel electrophoresis

D. Polymerase chain reaction
Biology
1 answer:
Fynjy0 [20]3 years ago
6 0

The best answer for this question would be: 

 

D. Polymerase chain reaction

 

<span>It is used in molecular biology in order to create small fragments of the DNA. Those copies of the DNA mimic the happenings in the cell. This chain reaction is an efficient technique to further research on crimes.</span>

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What are three ways body systems work together to maintain homeostasis?
mafiozo [28]

Answer:

Each organ system performs specific functions for the body, and each organ system is typically studied independently. However, the organ systems also work together to help the body maintain homeostasis.

For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance. The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure. If the water level gets too high, the urinary system produces more dilute urine (urine with a higher water content) to help eliminate the excess water. If the water level gets too low, more concentrated urine is produced so that water is conserved. The digestive system also plays a role with variable water absorption. Water can be lost through the integumentary and respiratory systems, but that loss is not directly involved in maintaining body fluids and is usually associated with other homeostatic mechanisms.

Similarly, the cardiovascular, integumentary, respiratory, and muscular systems work together to help the body maintain a stable internal temperature. If body temperature rises, blood vessels in the skin dilate, allowing more blood to flow near the skin’s surface. This allows heat to dissipate through the skin and into the surrounding air. The skin may also produce sweat if the body gets too hot; when the sweat evaporates, it helps to cool the body. Rapid breathing can also help the body eliminate excess heat. Together, these responses to increased body temperature explain why you sweat, pant, and become red in the face when you exercise hard. (Heavy breathing during exercise is also one way the body gets more oxygen to your muscles, and gets rid of the extra carbon dioxide produced by the muscles.)

7 0
3 years ago
Read 2 more answers
A dog breathes out CO2 and a tree releases O2. How are the dog and the tree connected in the oxygen cycle?
Hitman42 [59]
A dog breathes in oxygen and then releases carbon dioxide when he exhales. Conversely, a tree gives off oxygen and takes in carbon dioxide. So the breath of the dog sustains the tree while the output of oxygen for the tree sustains the dog.
6 0
3 years ago
What is the correct term for organisms that consume other organisms in order to gain energy and are also known as consumers?
ivann1987 [24]

Answer:

Heterotrophs

Explanation:

A heterotroph is an organism that eats other plants or animals for energy and nutrients.

3 0
3 years ago
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Radioactive materials that are high energy and will cause cellular and tissue damage are called:______.
s344n2d4d5 [400]

Radioactive materials that are high energy and will cause cellular and tissue damage are usually known as ; Alpha radiation.

<h3>What is Radioactive material and Alpha Radiation ?</h3>
  • Chemicals in the class of radionuclides (also known as radioactive materials) have unstable atomic nuclei. They stabilize themselves by altering the nucleus (spontaneous fission, emission of alpha particles, or conversion of neutrons to protons or the reverse).
  • For example, the Earth's crust naturally contains the radioactive elements uranium and thorium. These two elements slowly alter their forms over billions of years, leading to the production of decay byproducts like radon and radium. Energy is released during this process. Alpha radiation is one type of this energy.
  • Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways.

To know more about Radioactive materials please click here : brainly.com/question/15058562

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6 0
2 years ago
I need help.
Hoochie [10]
It’s symmetrical if it’s equal on both sides?
8 0
3 years ago
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