BIOLOGY HIGH SCHOOL

Which of the following is a consequence of water polluted by human sewage? a. pathogens
b. disease vectors
c. high levels of contaminants
d. all of the above

Answers

Answer 1
Answer:

Answer;

-All of the above

-pathogens, disease vectors, and high levels of contaminants

Explanation;

Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities. Water pollution is caused by;

  • Increases in nutrient loading may lead to eutrophication.
  • Organic wastes such as sewage and farm waste impose high oxygen demands on the receiving water leading to oxygen depletion with potentially severe impacts on the whole eco-system.
  • Industries discharge a variety of pollutants in their wastewater including heavy metals, organic toxins, oils, nutrients, and solids.
  • Discharges can also have thermal effects, especially those from power stations, and these too reduce the available oxygen.
Answer 2
Answer: D. all of the above. I'm pretty sure

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Which food sign is the same as the food sign for BIRD? . chicken.
restaurant.
menu.
order .

Answers

the food sign that is the same as the food sign for bird would be : Chicken

They both come from Aves and it will be very likely that they both have similar characteristics a a food

hope this helps
Chicken's sign is the same as the food sign for BIRD.

Explain quality phlebotomy and its purpose

Answers

Answer: Quality Phlebotomy Definition: set of policies and procedures designed to ensure delivery of highest-quality patient care and consistent specimen analysis.

Explanation:

Choose the statement that best describes the Americans who served in Vietnam.A. Most Americans who served in Vietnam had been drafted.

B. Most US soldiers in Vietnam were in the infantry.

C. Most US soldiers had attended a college or university.

D. Most US soldiers were young, working class volunteers.

Answers

The statement that best describes the Americans who served in the Vietnam war was most of the US soldiers were all young, working class volunteers. The correct answer is D. 

Answer:

Which of the following best describes the Americans who served as infantry soldiers in Vietnam?

Most were young, working-class draftees. **

Most were young, working-class volunteers.

Most were volunteers in their late twenties.

Most were drafted while attending college.

Explanation:

Which of the following is a major contributor to acid rain?A. burning fossil fuels
B. using solar cells
C. using windmills
D. using nuclear fission

Answers

Answer:

A. burning fossil fuels

Explanation:

Acid rain is caused, mainly by the emission of sulfur oxides and nitrogen oxides, which are gases commonly released into the atmosphere as a result of burning fossil fuels.

These oxides have the ability to interact with rainwater generating an acidic substance that is expelled from the clouds in the form of rain that has a very acidic pH.

The result of acid rain is the destruction of vegetables, the chemical alteration of water bodies, the death of aquatic animals, the contamination of groundwater and even the emergence of respiratory diseases and the destruction of public heritage.
A) Burning fossil fuels

How is most DNA duplication is the body accomplished?

Answers

most DNA duplicate through a process called mitosis 
DNA carries the information for making all of the cell's proteins.These pro­teins implement all of the functions of a living organism anddetermine the organism'­s characteristics. When the cell reproduces, ithas to pass all of this information on to the daughter cells.Before a cell can reproduce, it must first replicate,or make a copy of, its DNA. Where DNA replication occurs depends uponwhether the cells is a prokaryote or a eukaryote (see the RNA sidebar onthe previous page for more about the types of cells). DNA replicationoccurs in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.Regardless of where DNA replication occurs, the basic process is thesame.The structure of DNA lends itself easily to DNA replication. Each side of the double helix runs in opposite (anti-parallel)directions. The beauty of this structure is that it can unzip down themiddle and each side can serve as a pattern or template for the otherside (called semi-conservative replication). However, DNA does not unzip entirely. It unzips in a small area called a replication fork, which then moves down the entire length of the molecule.Let's look at the details:An enzyme called DNA gyrase makes a nick in the double helix and each side separatesAn enzyme called helicase unwinds the double-stranded DNASeveral small proteins called single strand binding proteins (SSB) temporarily bind to each side and keep them separatedAn enzyme complex called DNA polymerase"walks" down the DNA strands and adds new nucleotides to each strand.The nucleotides pair with the complementary nucleotides on the existingstand (A with T, G with C).A subunit of the DNA polymerase proofreads the new DNAAn enzyme called DNA ligase seals up the fragments into one long continuous strandThe new copies automatically wind up again

What tells a ribosome how to assemble a protein

Answers

The DNA tells a ribosome how to assemble a protein.
Codons in mRNA show which amino acids should protein be composed of.
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Imagine that you work at the medical examiner's office for a major metropolitan city. As Chief Medical officer, you investigate suspicious deaths and provide toxicology services for the county. Unfortunately, it's been a busy week. In the past five days, seven people have died, all with similar symptoms. It is your job to examine the data and determine the cause of death for these victims. The first was a 12-year-old girl. Her parents said that she was awake in the middle of the night complaining of a stuffy nose and sore throat. They gave her an extra strength Tylenol and sent her back to bed. At 7am the next morning, the parents discovered that the girl had collapsed on the bathroom floor. An ambulance rushed the girl to a nearby hospital, where she was pronounced dead. That same day, paramedics found the second victim unconscious on his kitchen floor after what they thought was an apparent heart attack. Sadly, the victim's brother and fiancée also collapsed later that night while the family gathered to morn his passing. Both had taken Tylenol to help them cope with their loss shortly before collapsing; neither survived.In the next four days, four other similar deaths were reported, all in the same neighborhood and all with similar symptoms. Are these seven deaths related? What is causing these people to die? It is your job to answer these questions before more deaths are reported.Symptoms exhibited by most patients: (i)-Dizziness(ii)-Confusion(iii)-Headache(iv)-Shortness of breath/rapid breathing(v)-Vomiting(vi)-Most deaths were very rapid, occurring within a few hours of symptoms.Explain whether or not you think these 7 deaths are related, and what questions you would ask the families of the victims.
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