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Fudgin [204]
3 years ago
12

Why do you think scientists need to identify something as a pure substance?

Biology
2 answers:
vesna_86 [32]3 years ago
7 0
Scientists need to identify something as a pure substance in order to keep track of what’s safe and what’s not.
Alisiya [41]3 years ago
4 0

Answer:

because,

if somethinggoes wrong it can be dangerous to all

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Mutation is a random and non-adaptive process. This was first proven by:
s2008m [1.1K]

Answer:

Option (d).

Explanation:

Mutation may be defined as the sudden, heritable change in the nucleotide sequence of the organism. Mutation may occur due to the errors in DNA replication or may occurs due to the mutagens.

Joshua and Lederberg experiment explains that mutation is the non adaptive and random process that occur in the organism. He used the replica plating of E.coli and grows them on streptomycin drug. The bacteria was grown on the the primary plate and they are transferred to the secondary plate with streptomycin drug in the growth environment. The resistant strain of bacteria grows in the streptomycin environment.The pattern of bacteria growth on the plate explained that mutation occurs randomly and it is a non adaptive process.

Thus, the correct answer is option (d).

4 0
3 years ago
Which structures in the skin help to regulate body temperature? Check all that apply.
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Answer:

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