Answer:
1.You can identify a fossil by determining it's age by comparing it to similar fossils.
2. You can measure the decay of isotopes within the fossil
Explanation:
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The answer is b. the germ theory of disease.
Louis Pasteur proposed that some diseases are caused by germs in the XIX century.
The concept of atomic weight was proposed by John Dalton. Benjamin Franklin proposed a simple theory of electricity, which was later compounded by Charles du Fay. The theory of evolution was proposed by Charles Darwin.
The plant cells are more complex because it has more structures like the cell wall and chloroplast.
Plant cells can be larger than animal cells. The normal range for an animal cell varies from 10 to 30 micrometers while that for a plant cell stretches from 10 to 100 micrometers. Beyond size, the main structural differences between plant and animal cells lie in a few additional structures found in plant cells. These structures include: chloroplasts, the cell wall, and vacuoles.
Hope this helps.
Answer:
The acronym mRNA means messenger ribonucleic acid, the nucleic acid responsible for transporting genetic information to the ribosome so that protein synthesis can occur.
Explanation:
Messenger ribonucleic acid or mRNA, is a nucleic acid responsible for containing the genetic code, organizing it into codons —depending on the specific sequence of nitrogenous bases— and taking it to the ribosome for translation and initiation of protein synthesis.
A codon is a sequence of three mRNA nucleotides, each of which encodes a specific amino acid, in addition to:
- <em>Marking the start of protein synthesis, by means of the UAC start codon, which also encodes for amino acid methionine (MET).
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- <em>Indicate the stop of protein synthesis, by means of the STOP codons </em>—<em>UAA, UAG and UGA</em>— <em>which do not code for amino acids.
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This can be seen in the table:
- The first line is the sequence of nitrogenous bases of one of the DNA strands.
- The second line should indicate the sequence of complementary bases of the other DNA strand, which will be transcribed. However, the presence of uracil indicates that it is the mRNA transcribed
- The third line is the sequence of nitrogenous bases in the mRNA strand, organized in triplets or codons.
- The fourth line expresses each of the amino acids and instructions found in the mRNA fragment that was transcribed methionine (start), lysine, tryptophan, proline and STOP (although GUU encodes the amino acid valine and is not a STOP codon).
Answer:
FALSE
Explanation:
To coexist mean to exist (live) at the same time.
The dinosaurs disappeared about 66 MILLIONS years ago... that's a long time!
Humans first appear around 300 THOUSANDS of years ago.
As you see, we're not talking about the same scale of time at all, so there was never any encounter between a live dinosaur and a live human, except in the movies, that might be the reason we find them so cool. :-)
