The zebra finch (Taeniopygia guttata) is a songbird used as a model organism to study behavior, neurobiology, toxicology, endocrinology, and genetics. Zebra finches are diploid with a total of 80 chromosomes (2n=80). (1pt)a. How many chromosomes are present in a cell during G1 of interphase?b. How many sister chromatids are present in a cell during metaphase in mitosis?c. How many chromosomes are present in a cell during anaphase in mitosis?d. How many sister chromatids are present in a cell during metaphase II of meiosis?

Environmental impacts on evolution : mastery test

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous