The proteins involved in attaching the chromosomes to the mitotic spindle are
A. kinetochores.
B. chromatids.
C. nucleosomes.
D. centromeres.
E. histones.
A. kinetochores.
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Phenotypic similarities that provide no information about shared ancestry are called
a. homologies. b. homoplasies. c. morphological. d. anatomical. e. mosaic characters.
The control in an experiment
a. makes the experiment valid. b. is an additional replicate for statistical purposes. c. reduces the experimental errors. d. minimizes experimental inaccuracy. e. allows a mixed group of comparisons among different organisms for the experimental group.
Water can maintain a constant temperature better than some other liquids because _____
1.hydrogen bonding keeps the water molecules from moving around too much 2.cohesion forms a seal that keeps heat out 3.heat is generated by ions and there are few ions in water 4.covalent bonds remove energy from the system and keep water cool
Progeria is a genetic disorder that causes numerous symptoms that resemble premature aging in patients. Progeria is caused by a dominant allele, and it always results in fatality before sexual maturity. Which of the following statements must be true about progeria?
What will be an ideal response?