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IRISSAK [1]
3 years ago
12

Sort the sentences based on whether they describe the properties of a heterogeneous or a homogeneous mixture.

Biology
2 answers:
babymother [125]3 years ago
5 0

Answer:

-Its components are visible- heterogeneous mixture.

An heterogeneous mixture has visible boundaries of separation between the various constituents. It has two or more visible phases. It has more than one kind of component visible to the eye.

-It may be mistaken for a pure substance- homogeneous mixture.

A pure substance isn't mixing with anything else but all mixtures consist of o or more substances, however as homogeneous mixtures don´t have visible components, we can be mistaken for a pure substance.

-It can be separated using distillation- homogeneous mixture

This process can separate a variety of mixtures with different boiling points. Distillation is used to separate mixtures that are homogeneous.

-Example:

homogeneous mixture: A solution of sodium chloride in water.

heterogeneous mixture: Oil in water.

mr Goodwill [35]3 years ago
3 0
<span>Its components are visible. --heterogenous

It may be mistaken for a pure substance.  --homogenous

It can be separated using distillation.  --homogenous

Concrete is an example of this kind of mixture.  --heterogenous

Hope this helps!</span>
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Arturiano [62]
It would be epithelial tissue that covers it.

5 0
3 years ago
Define each of the following zones:
Misha Larkins [42]

Answer:

Benthic Zone-  bottom of ocean

Pelagic Zone- the open ocean that is not near the  coast.

Oceanic zone- Zone that is beyond the continental shelf

Neritic zone- Zone that exists over the continental shelf

Photic zone- Zone where sunlight pass through

Aphotic zone- Zone where sunlight cannot pass through

Explanation:

There two important zones of the  ocean that can be termed as Benthic Zone which lies at bottom of ocean or sea and Pelagic Zone that could be imagined as a cylinder or water column that goes from the surface of the sea or ocean to its bottom. At the very bottom of the sea there lies an ecological region termed as Benthic Zone.The pelagic zone can also be termed as the open-ocean zone and it is in contrast with water that is nearer to the coast or continental shelf.

There are different zones that lies within a Pelagic Zone. They are

Oceanic, Neritic, Photic, Aphotic. The zone that lies beyond the continental shelf comes under this oceanic zone and Photic and Aphotic as the name suggests it refers to light. It referes to the zones where sunlight can penetrate and can not penetrate respectively.

8 0
3 years ago
A federally funded research study involving children 8 to 12 years old involves collecting a single voided urine sample to asses
777dan777 [17]

Answer: A federally funded research study involving children 8 to 12 years old involves collecting a single voided urine sample to assess the frequency of asymptomatic <em>proteinuria</em>.

Your IRB has determined that assent of children age 8 and older is required for the study. A 10 year old firmly declined to participate in the study.

The best procedure that describes the <u>action </u>to be taken by the investigator is:

  • Honor the Childs decision .

Explanation:    

The <em>purpose</em> of the IRB is to <em>assure that appropriate steps are taken</em> to <em>protect the rights </em>and welfare of humans participating as subjects in a research study. It promotes <em>fully informed and voluntary participation</em> by prospective subjects capable of making such choices (or, if that is not possible, informed permission given by a suitable proxy), and seeks to maximize the safety of subjects.

The capacity admits degrees. The same patient may be able to decide certain things and not others. So, the more transcendent or delicate a decision is, the higher the level of capacity required must be. When the patient <u>is not capable, it is up to his relatives to make the decisions.</u>

4 0
3 years ago
Climate changes cause a drought. There is no food to collect. To survive, the animals must become predators, catch and kill prey
slamgirl [31]

Answer:

This event is telling the evolution by natural selection. This is the directional selection where most adapted animals will survive. According to Darwin, the new species arise from a single ancestor due to variation.

It had also seen in the Finches. All the new species of Finches came from a pre-existing seed-eating Finch. When the environment was favorable the Finches were herbivore and feed on seeds.  

When the number of birds increases, there is a competition between them. Because the food source was limited. To prevent this competition  

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This food habit change also changes their morphology and separate them from their ancestor.

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6 0
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AURORKA [14]
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6 0
3 years ago
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