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ra1l [238]
4 years ago
10

In an experiment there are two groups. which group is not changed in any way

Biology
1 answer:
Semenov [28]4 years ago
5 0

Answer:

The control group is the group that is not changed.

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During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic
anyanavicka [17]

The answer is Neogene

Explanation:

It cannot be Cenozoic because that is an era. Not a period. Paleogene, Neogene, and Quaternary (our current period) are all periods within the Cenozoic Era (our current era). On the geologic time scale, there are Eras, Periods, and Epochs (and a few more classifications). Humans first appeared in the Miocene epoch which is an epoch in the Neogene period (in the Cenozoic era).

This is why the answer is Neogene.

Hope this helps...

5 1
3 years ago
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The Punnett square shows the results when two parent dogs are crossed. L represents the allele for a long tail, and l represents
qwelly [4]

Answer:

incomplete dominance because neither allele for tail length is dominant

I'm pretty sure

Explanation:

googIe

5 0
3 years ago
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Which was an idea used to dispute the theory of plate tectonics?
umka2103 [35]

Answer:

option d is correct. the existence of land bridges between continents.

Explanation:

landland bridge theory which was used to explain why species would end up continents over, such as mammoth travelling to North America, thisthis theory was based on the idea that water eventually Rose to cover these bridges rather than the at having individual plates that moved away from each other.

5 0
3 years ago
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Research indicates that ibuprofen a drug used to relieve inflammation and pain is a mixture of two enantiomers that is molecules
sergeinik [125]
<span>Are mirror images of one another
  in science, an enantiomer, otherwise called an optical isomer, where you have two stereoisomers that are perfect representations of each other that are non-superimposable , much as one's left and right hands are the same aside from being turned around along one pivot.</span>
5 0
4 years ago
Beadle and Tatum used which of the following organisms to support their one gene - one enzyme concept?
Rama09 [41]

Answer:

Neurospora.

Explanation:

Beadle and Tatum experiment shows one gene one enzyme hypothesis. According to this, a single enzyme is encoded by each gene. This idea is not accepted in today's world.

Beadle and Tatum performed experiment on the neurospora. They chosed neurospora in their experiment because neurospora shows the fast life cycle with alternation of generation. The genetic experiments can be easily performed on neurospora.

Thus, the correct answer is option (c).

8 0
3 years ago
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