Answer:
Flowers are derived evolutionary from modified <u>leaves</u>.
Explanation:
Flowers are modified leaves possessed only by the angiosperms, which are relatively late to appear in the fossil record. The flowering plants have long been assumed to have evolved from within the gymnosperms; according to the traditional morphological view, they are closely allied to the Gnetales.
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.
The answer is metaphase 1
Answer:
ring
Explanation:
ri
The sphincter is a ring of muscle surrounding and serving to guard or close an opening or tube
The possible evolutionary explanation for death is that an organism which was less adapted to its environemnt will die out sooner than will the one that was adapted more to it. Another possible way of thinking is that each organism has to die in order for his offspring that will likely be slightly more adapted to the environment to live on.
