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Lemur [1.5K]
3 years ago
6

Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the

vessel contains blood and has valves. What is the blood vessel that he is observing?
Biology
2 answers:
coldgirl [10]3 years ago
8 0

Answer:

Veins

Explanation:

inn [45]3 years ago
3 0

Answer:

the person is correct its VEINS

Explanation:

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Which will most likely cause a decrease in the predator population? an increase in prey populations 2. a decrease in prey popula
e-lub [12.9K]

Answer:

\huge\boxed{\sf A \ decrease \ in \ prey\ population}

Explanation:

Predators are those animals which hunt prey. Prey is the animals which is "hunted".

When the prey population is less (a decrease in prey population), There will not be more animals for "predators" to hunt and so, the competition of living will become more. Decrease in preys population would lead to a decrease in predator's population because many predators will die of hunger.

\rule[225]{225}{2}

Hope this helped!

<h3>~AnonymousHelper1807</h3>
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2 years ago
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Which point is flawed as written above?
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You didn't attach the problem. Without it, I can't help you. Sorry.

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Two scientists do not agree on which type of grocery bag is better for the environment.What is most likely outcome of their disa
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Most probably these scientists will do more studies and experiments in order to learn more about the subject. For example, if they compare plastic grocery bag with paper grocery bag it is important to investigate which one is a better resource use in the life cycles, which one is better for manufacturing or whether one of them can be reused. There are many questions about this issue.

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Provide one reason to support the creation of national DNA database and one reason to refuse (not allow) it’s creation.
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Answer:

The correct answer is -

Support - it is helpful in identifying and locating criminals who do the heinous crime.

Against - It has its own flaws like if the sample increases there would be chances of false matching or error.

Explanation:

The national DNA database is a database that stores DNA profiles of the criminals found from the crime scenes to find and identify criminals like murderers and others. It has been found a very helpful tool for fighting with the crime.

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