Answer:
Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds. Vestigial structures can become detrimental, but in most cases these structures are harmless; however, these structures, like any other structure, require extra energy and are at risk for disease.
Explanation:
sincerely, micah
Activational effect is the correct answer.
Activational effect is an impermanent hormonal effect that leads to a change in physiological activity or behavior in both humans and adult animals. For instance, when testosterone levels rise in male songbirds they become more aggressive and tend to engage in courtship behavior. Also, a pregnant woman may get more emotional than usual due to an extra level of progesterone and estrogen during pregnancy.
In terms of function, bird wings are used to flap transversely, whereas butterfly wings are used to flap laterally. In terms of structure, bird wings are filled with hollow bones for easier flight, whereas butterfly wings are structured by scales and tiny hairs.
Answer:
a. The model delivers amino acids to the ribosome so they can
be added to the developing pepetide.
Explanation: tRNA is transfer ribonucleic acid. Its help to aid translation process. They have the appropriate anti codon that is a complement of mRNA i.e messanger RNA they Therefore give the appropriate amino acids to ribosome to form the appropriate polpeptide chain. Each amino acid has its own tRNA.
Answer:
i think 1 is either b or d
Explanation:
