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Rasek [7]
2 years ago
13

Which of the following best describes a controlled experiment? a. An experiment repeated many times to ensure that the results a

re accurate b. An experiment includes at least two groups, one of which does not receive the experimental treatment c. An experiment that includes one group for which the scientist controls all variables d. An experiment that includes at least two groups, one differing from the other by two or more variables
Biology
2 answers:
jonny [76]2 years ago
8 0

Answer:

c

Explanation:

you need a group to actually have an controlled experiment

german2 years ago
6 0

Answer:

I think the answer is C: An experiment that includes one group for which the scientist controls all variables

Explanation:

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(c) find the longest interval during which no tree-cutting samples occurred. what is the first year that no tree-cutting samples
MaRussiya [10]

Answer:

Longest interval during which no tree-cutting sample occurred: 9 years (1203 AD - 1212 AD)

First year in that interval: 1203 AD

Explanation:

Lets complete the question first.

Q) A study uses tree rings to determine the year in which a tree was cut. The data is shown in the leaf and stem diagram in the ATTACHMENT.

The three digits number in the left column represents centuries and decades AD. The numbers on the right represents the years.

For example, consider the first input in the diagram

119 | 5   6

which means it represents 2 samples.

1195 AD, 1196 AD.

The longest interval with no tree-cutting samples is found from 1203 AD to 1212 AD.

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2 years ago
Humans are much more likely to associate snakes with danger than flowers and danger. According to the evolutionary perspective,
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Answer:

preparedness.

Preparedness is the tendency to learn some associations more easily, quickly and permanently than others.

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An endospore may survive a drought because it is protected by a
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Answer:

An endospore may survive a drought because it is protected by a THICK WALL

Explanation:

An endospore is a structure that is produced by some bacteria. This structure possesses characteristics such as:

a. Endospores have thick walls

b. They are very resistant and resilient to changes in temperature.

c. They are resistant as well to the action or activity of some chemicals.

d. Endospores serves as a means of protection for microorganisms such as Bacteria.

e. Endospores do not reproduce.

f. Endospores can be dormant or Inactive for a very long period of time.

Endospores may survive drought, activity of chemicals, extreme weather conditions, extreme temperatures due to the presence of thick walls in their structure.

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What alternate form of genes do nucleic acids have that allows them to offer variability? allele codon nucleotide chromosome​
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Answer:A-Allele

Explanation:

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