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Ad libitum [116K]
3 years ago
14

When the pure food and drugs act was first passed, drugs were legally required to be:?

Biology
1 answer:
Free_Kalibri [48]3 years ago
3 0
Pure and accurately labeled. 

Hope this helps!
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What factors differentiate Earth's atmospheric layers?
KengaRu [80]

Answer:

What factors differentiate Earth's atmospheric layers?

A. Pressure and Rate of condensation

B. Radiation deflection and Rate of condensation

C. Temperature and Pressure

<h2>D. Temperature and Radiation deflection</h2>

4 0
3 years ago
Researchers studied mice embryos to determine whether the cells of the ear bones originated from the same embryonic cells as the
Rina8888 [55]

The researchers will use mice instead of opossums or humans to determine whether the cells of the ear bones originated from the same embryonic cells as the cells that form the jaw in other vertebrates because in this type of experiment, organisms that are ideal are the ones that have a short life span, easy to be researched on and easy to mantain.

It will be very tedious and demanding to use opossums and humans in this type of practical experiment because,it is against the culture and norms guilding human living and existence to use humans as model organisms,opossums as well are very bad model organisms because unlike the mice,opossums are long lived and it will be very difficult to raise and maintain an opossum in a laboratory.

Humans and mice are both mammals just that human is a higher mammal but they share similar features in terms of pattern of development,though there is a clear difference during their early development,so because of the common ancestry shared by the mice and humans,the result of the experiment on the mice with share a close similarity with the pattern that is expected in humans.

8 0
3 years ago
Explain the role of a hypothesis in a scientific investigation.
k0ka [10]

Answer:

A hypothesis is a testable proposition

used to explain scientific phenomena. It

may be based on previous observations

(a sort of educated guess) or it may

simply be a hunch. Most scientific

hypotheses are combinations of

observation and intuition. The important

thing is that the hypothesis be testable.

If the hypothesis is disproved through

testing, then it is discarded and a new

hypothesis is proposed. If the hypothesis

stands up to rigorous testing, then our

faith in the hypothesis is increased.

This system of careful, rigorous, and

unbiased testing of a hypothesis is what

characterizes the scientific method.

Hope it helps!

4 0
3 years ago
What is the range for the following set of measurements?
amm1812
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