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sveticcg [70]
3 years ago
8

HELP PLZZZZ all u need to know is in picture

Biology
2 answers:
zloy xaker [14]3 years ago
6 0
The answer to your question is Answers c and d in my opinion
Sav [38]3 years ago
4 0
I believe the answer is C.
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What will be the percentage of potassium-40 remaining after 3.9 billion years?
Papessa [141]
Potassium-40 has a half life of 1.251×billion<span> years</span><span>. To determine the percentage potassium-40 remaining after 3.9 billion years, divide
3.9 by 1.251, = 3.12.

This is the number of times the original amount of potassium-40 reduces by 50%. The remaining percentage is therefore 100%/(3.12 * 2) = 16.03%.</span>
5 0
3 years ago
Which describes the greenhouse effect? an artificial process a dangerous process a natural process a new process
Yuri [45]
The answer would be a dangerous process, this is because the greenhouse effect traps gasses such as CO2 and other harmful gasses emitted from the Earth, that can ultimately lead to problems in the future.

The greenhouse effect is also the reasoning behind why scientist believes in Global warming and climate change. 

Plus, the greenhouse effect is neither natural, new, nor artificial.
9 0
3 years ago
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What is the function of RBC
avanturin [10]

Answer:

When a red blood cell is placed in a hypertonic solution, it contracts as water is drawn out of the cell and into the surrounding solution. If the same blood cell is placed in a hypotonic solution, the blood cell grows in size. Blood cells in isotonic solutions do not shrink or swell.

The reason that blood cells change in size when placed in a solution with different salt concentration is due to the osmosis process. Osmosis causes solutions with high concentrations of salt to draw water from areas with low concentrations of salt.

There are some exceptions to this phenomenon. Blood cells can draw water and explode when placed in hypertonic solution on some special occasions. Some diseases affect the structural integrity of blood cells. Also, when human blood cells are exposed to temperatures close to freezing, they can draw water and explode.

Osmosis is an important phenomenon for living systems. The amount of salt in a given solution exhibits a tendency to diffuse through the environment, eventually resulting in equilibrium. In addition to blood cells, the kidneys function through the use of osmotic principles. The kidneys filter an animal's blood to remove excess salt and balance the amount of water

7 0
3 years ago
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A population of trout in a lake has significantly declined over the past year. The main source of food for the fish in this lake
andrew11 [14]

The decline in the overall population of trout and larger fish is because the Insect population has decreased.

<h3>What is a population?</h3>

A population is a group of organisms of the same species living in the same habitat.

Population of organisms is affected by;

  • availability of water
  • space
  • food and nutrients
  • predators
  • climate change

Since the population of trout is directly affected by the number of insect species, the decline in the overall population is because the Insect population has decreased.

Learn more about population at: brainly.com/question/746835

3 0
2 years ago
What is the purpose of spindle fibers during mitosis?
Sonja [21]

Answer:

I think the answer Is divide the cell in half and see the explanation

Explanation:

Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis

6 0
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