Cells are the basic unit and structure of everyone. When someone is made, they are made out of one cell. They go through mitosis to make more cells and grow. Cells though are the building blocks of life because all life forms start off as cells.
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Answer:
Fossils provide evidence about life on Earth that currently extinct. Through fossils, we've discovered several species of animals and plants that previously existed. We also learn how life on Earth changed throughout the years. Fossils found in younger rocks look like animals and plants that are living today. Fossils in older rocks look less like the current living animals and plants. Some fossils found look either more or less like current species we know today.
Explanation:
Answer:The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Explanation:
a population commonly expresses traits that are otherwise rare in the species.
Answer:
2; 1; 4; 3; 4; 5
Explanation:
A transfer RNA is a small RNA sequence (approximately 75-90 nucleotides in size) that serves as an adaptor molecule in order to link a specific triplet of nucleotides or 'codon' in the messenger RNA (mRNA) with a particular amino acid in the ribosomes during protein synthesis (i.e., during translation). The tRNAs have 1-a trinucleotide region known as the anticodon, which is a sequence complementary to a codon in mRNA, and 2-a region for attaching a particular amino acid. Moreover, a ribosome has three slots for binding tRNAs: A site, P site, and E site. The ribosomal A-site is the first location the t-RNA binds during translation; the P-site is the second binding site for tRNAs; and, finally, the E-site is the third site where deacylated tRNAs bind before their dissociation from the ribosome.