All of the following statements are true regarding mitosis and meiosis II EXCEPT:
A. The earliest eukaryotes were almost always single-celled and haploid, and they produced by mitosis.
B. Mitosis evolved later, from meiosis.
C. By mitosis and cytoplasmic division, one cell becomes two new cells.
D. The outcomes of mitosis and meiosis differ.
E. The molecular machinery of mitosis became remodeled into meiosis.
Answer: B
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A diploid organism has a total of 36 chromosomes. Assuming all possible chromosome combinations are viable, if a mutant tetraploid version of this organism was created how many chromosomes would it have? If a mutant version of this organism was
monosomic for chromosome 9 how many chomosomes would it have? A. 144; 35 B. 72; 35 C. 144; 37 D. 72; 37
What factors determine the tree line in alpine areas? Check all that apply.
_____ low temperatures _____ water availability _____ pH of soil _____ high winds _____ light availability
During meiosis I, homologous chromosomes undergo chiasma formation. Which of the following can happen now when the homologous chromosomes synapse or contact each other?
a. Homologous chromosomes can undergo a process by which random proteins are made via independent assortment. b. Homologous chromosomes can exchange arms with one another via DNA replication. c. Homologous chromosomes can undergo a process by which identical characteristics are simultaneously expressed. d. Homologous chromosomes can exchange arms with one another via homologous recombination.
A minimal medium for E. coli contains
1.water. 2.an organic carbon source such as glucose. 3.inorganic salts. 4.an inorganic salt providing nitrogen. 5.All of the options are correct.