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Maslowich
3 years ago
9

Living organisms respond to their environment by chemical changes or by reaction to ________.

Biology
2 answers:
satela [25.4K]3 years ago
7 0

Answer:

B

Explanation:

AleksandrR [38]3 years ago
3 0
The answer is B.nerves
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Why are there only 20 amino acids when there are 64 variants of triplets?
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The genetic code is degenerate.

Explanation:

The genetic code is degenerate: there are 64 triplets of different codons (sequence of three bases of mRNA that codes for a certain amino acid) and 20 amino acids. That is, an amico acid can be encoded by more than one codon.

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why do the three species have similarities and differences in their body structures, and how can Xiao use the structures to dete
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Xiao can use these structures to create a similarity matrix that enables to differentiate between synapomorphies and homoplasies .

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A synapomorphy is a trait that has been inherited from the same ancestor, this trait enables to establish a relation of homology between two or more species; while a homoplasy is an analog structure that doesn't have homology.

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Option D is correct

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Luria broth contains yeast concentrate so it would show a marked B- galactosidase activity which is an enzyme that catalyzes the hydrolysis of B- galactosides including lactose and it is the first step of lactose fermentation.

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