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To test if the chickens lacked thiamine the scientist could test the blood concentration of thiamine in the chickens on a future study, unless blood samples were taken during the original study.
In any future studies, the same experiment would need to be done but with this added measurement on both the control group and the test subjects.
Crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
CROSSING OVER:
- Crossing over is the process whereby non-sister chromatids of homologous chromosomes exchange their genetic materials.
- Crossing over occurs specifically during the prophase I stage of meiosis I. Via this process, genetic diversity is likely to occur in the daughter cells.
- Crossing over only assures that genes of homologous chromosomes are recombined, it does not stop them from separating in the Anaphase stage.
- Therefore, crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
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The displaced fracture is caused when the bone breaks into two or more parts and the bones are no longer in alignment with each other. These broken bones becomes abnormally arranged. Normally, these fractures are caused due to trauma. The bone breaks or cracks, and gets displaced from its original position, and then it gets arranged in the abnormal position.
Hence, the blank can be filled with 'displaced'.
Eukaryotic: mitosis: prokaryote: binary fission
Eukaryotic cells reproduce by mitosis while prokaryotes reproduce by binary fission.
Eukaryotes include fungi, plants, and animals and are complex in structure. They have a nucleus, several organelles and more DNA (deoxyribonucleic acid). Eukaryotic cells undergo mitosis; a form of cell division that usually produces two similar daughter cells with the same genetic component as the parent cell. Prokaryotes include bacteria, and archaea, and are quite simple in structure. They do not have organelles or nucleus, but they have only a small amount of DNA. Prokaryotes undergo binary fission; a type of asexual reproduction in which there is replication and segregation of a single DNA molecule.