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Stells [14]
3 years ago
8

What is the hallmark of a chemical change?

Biology
1 answer:
Oksi-84 [34.3K]3 years ago
4 0
There are five signs that indicate a chemical reaction has occurred: odor, energy change, gas bubbles, precipitate formation, and color change. When any of these changes occur, the reaction is irreversible and cannot be undone.
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What part of an amino acid is the peptide backbone? Is it everything besides the side chain? Please help!
grigory [225]
It is the long string of amino acids.
7 0
3 years ago
The physical basis of memory is a pathway through the brain called a memory trace, in which new synapses have formed or existing
vekshin1

Answer:

True

Explanation:

Memory is formed by creating new neural pathways from stimuli we receive (smell, vision, auditory etc) to the brain where the pereception of  it occurs.

Memory is defined as ability of the brain to encode, store, and retrieve information when needed. Memory forming is actually information processing that includes:

•  sensory processor -  sensing the information from the outside world ( chemical and physical stimuli)

• Working memory (short-term memory) -  encoding (stimuli information) and retrieval processor (from previously stored material)  

• Long-term memory - to store data through systems.

4 0
3 years ago
What could happen if a ribosome mistranslated a segment of DNA to RNA?
Crazy boy [7]

Answer:

During translation, the two subunits come together around a mRNA molecule, forming a complete ribosome. The ribosome moves forward on the mRNA, codon by codon, as it is read and translated into a polypeptide (protein chain). Then, once translation is finished, the two pieces come apart again and can be reused.

Explanation:

8 0
3 years ago
Which of the following pairs are the best examples of homologous structures? A) bat wing and human hand B) owl wing and hornet w
vaieri [72.5K]

Answer:

A) bat wing and human hand

Explanation:

Homology in biology  is existence of the shared ancestry between the pair of structures or the genes present in the different taxa.

<u>The most common example of the homologous structures is forelimbs of the vertebrates, where wings of the bats, arms of the primates, front flippers of the whales and forelegs of the dogs and the horses are all derived from same ancestral tetrapod structure. </u>

Homologous structures can be explained by evolutionary biology which states that these are adapted to the different purposes as  result of the descent with the modification from common ancestor.

8 0
3 years ago
WILL MAKE BRAINLIEST!
motikmotik
<span>Some amino acids have multiple different codons that can code for them. So for some point mutations, one wrong nucleotide in a codon may still allow it to code for the same amino acid. For example. Serine has 4 different possible codons which can code for it. UCA, UCC, UCU, and UCG. Note that if the last letter were change in any instance, it would still code for serine. There are MANY other examples for this question; almost all amino acids have more than one codon which can code for it.</span>
6 0
3 years ago
Read 2 more answers
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