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EastWind [94]
3 years ago
8

A scientist wants to prove that certain chemicals in cosmetics are likely to cause harm to developing fetuses, when used by a pr

egnant mother. What is the most likely limitation she will face in her scientific design?
Biology
1 answer:
likoan [24]3 years ago
3 0
The limitation is that she can't test is on humans for ethical reasons. In order to test this, theoretically, she would need to ask some women to use this cosmetic and compare their fetuses to the fetuses of women who didn't. But this is not likely to be approved by the ethical committee, as causing damage to a fetus is not ethical.
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Serga [27]

Answer:

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

Explanation:

The Heart pumps the oxygen-rich blood to the different parts of the body to Otake oxygen and nutrients to these organs and then takes the oxygen-poor blood returns from the body to the heart.

The two major vessels that return oxygen-poor blood to the heart are 1. superior vena cava (SVC) that drainages Head, neck, upper limb, thorax and terminate at top of the right atrium, and 2. inferior vena cava (IVC), Lower limb and terminate at bottom of the right atrium.

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

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3 years ago
How are freshwater environments, such as rivers and lakes, being impacted by human activity
Rama09 [41]

Answer:

they are being impacted negativily and this is what they are being impacted by industrial dumping, pesticides, and agricultiural fertilizer can end up in rivers, lakes, streams, etc.  

Explanation:

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3 years ago
Active transport requires _E_ __ __ __ __ __ to move molecules across
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Hope this helps you!

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2 years ago
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30 percent

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