BIOLOGY HIGH SCHOOL

A farmer's fields, which are close to a stream, has experienced a lot of runoff. One possible effect of the runoff is that the stream will have a decreased level of fertilizers from the field. True od False

Answers

Answer 1
Answer:

Answer: False

Surface run off is a kind of water erosion in which the surface layers of the top soil containing minerals and sediments is wiped out by the water and deposited to some other place. In the given situation, the surface run off of the farmer's field close to the stream will likely to remove the fertilizers hence,the level of the fertilizers in the stream is likely to increase.
Answer 2
Answer: it's false. the runoff will increase the fertilizers in the stream, because it takes whatever is siting on the surface.

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3. Explain the role of enzymes and how they affect the chemical reactions of living things.

Answers

Enzymes are proteins that serve as biological catalysts by speeding up chemical processes. The enzyme is not destroyed during the reaction and is reused.

What do enzymes do ?

Enzymes help with the chemical reactions that keep a person alive and well. Many key functions in the body are supported by enzymes. Here are a few examples:

  1. The digestive system: Enzymes assist the body break down more complex molecules, such as glucose, into smaller ones that may be used as fuel.
  2. DNA replication: DNA is found in every cell in the body. When a cell divides, it must duplicate its DNA. Enzymes aid in this process by unraveling the DNA coils.
  3. Toxins in the body are broken down by liver enzymes. To do this, it employs a variety of enzymes to aid in the process of eliminating the poisons.

Enzymes also aid in the following activities:

  1. hormone manufacturing
  2. cell management
  3. producing movement to constrict the muscle 
  4. producing movement to constrict the muscle 
  5. transporting things around a cell 
  6. respiration 
  7. signal transduction

Hence, enzyme plays a vital role in functioning of the body.


Learn more about enzymes, here:
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Answer:

The role of enzymes is that enzymes are vital for life

Explanation:

Enzymes are vital because they are proteins that make the body work faster such as digestion and metabolism.

Why must all conditions except the independent variable be held constant for all experimental treatments?

Answers

Uhm... I believe you mean a situation when we examine a relation between two variables. In this case all other conditions must remain as constant as possible because they could affect a result and then the conclusions could be false. ie. you examine a relation between temperature and frequency of cell division/organism's activity, then you should stabilize air pressure, food composition, bacterial flora in experimental room... etc. of course when you conduct research in a field, ie. ecological research you can't do any of that but then you are obliged to explain possible aberrations of your results in an article's discussion.

Weasels eat arctic hares, which is the predator

Answers

the predator would be the weasel, as it hunts down the hare :)

Drinking too much water during exercise can cause a condition in which the concentration of sodium in the blood is lower than normal. What response do you expect to happen as the body tries to restore homeostasis? Cells swell as water moves into them.Cells swell as water moves out of them.Cells shrivel as water moves out of them.Cells shrivel as water moves into them.

Answers

The correct option is this: THE CELLS SHRIVELS AS WATER MOVES OUT OF THEM.

Drinking too much water makes the concentration of sodium inside the cell to be lowered compared to the concentration of sodium salt outside of the cells. Because of this, water will flow out of the cell into the surrounding medium and the cell will shrink up. Water usually flow across a semi permeable membrane in the direction where there is high concentration of solutes. Water volume remains the same in both side of a semi permeable membrane if the solution is isotonic, that is the concentration of salts on both side of the membrane is the same. In a situation where the surrounding medium is not isotonic, water flow to the region, where the concentration of salt is higher.

C. Cells shrivel as water moves out of them.

This isn't a school related question but my german shepard just at a small amount of chocolate that was mixed in with peanut butter and oats what should i do?

Answers

About how much chocolate was there?
if it was just a small tiny bit then it should be okay but any more than the size of an Oreo I would take it to a vet or call a animal poison control

If you cry a lot, would you eventually go blind?

Answers

Answer:

No, you would not go blind, even though the composition of emotional tears are different.

Answer:

Simply no, But when humans cry in response to stress, their tears contain a number of stress hormones and other chemicals. Researchers believe that crying could reduce the levels of these chemicals in the body, which could, in turn, reduce stress.
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