Answer:
evolutionary lineages from common ancestors
.
Explanation:
Fossils are the remains of organisms which are present very long time ago and now their specie is not alive. The study of these fossils helps us to know about the ancient animals and evolution of different organisms from these extinct organisms. They tells us about the evolutionary lineages in different existing organisms from common ancestors. These fossils also give us information about behavior and reproduction of these organisms.
People who have darker skin have more melanin which is a black or dark brown pigment in the skin. When we are out in the sun our skin produces more melanin, which helps our skin be more resistant in the sun. This is why we tan.
Wind is considered an abiotic factor because it is not a living organism.
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A Trombe wall (Trombe rhymes with prom, by the way) is a wall that warms trapped air, and then circulates it to help heat a house. Trombe walls are ideally made out of a material with a fairly high thermal mass materials (like bricks or concrete), and are often painted black to improve heat conduction
Answer:
d) a polypeptide missing an amino acid.
Explanation:
Deletion is a type of mutation when one or more codons from the reading frame are removed. This results in the production of a relatively shorter mRNA that lacks one or more codons otherwise present in the non-mutated mRNA. When there is a deletion of a single codon in the gene for cystic fibrosis, the resultant shorter mRNA codes for a polypeptide chain that does not carry one amino acid. For example, deletion of one codon results in deletion of a Phe residue present at position 508 in CFTR. The mutated transmembrane protein CFTR folds in an improper way.
