After the centromeres separate during mitosis, the chromatids, now called _______, move toward opposite poles of the spindle.
a. centrosomes
b. kinetochores
c. half-spindles
d. asters
e. daughter chromosomes
Ans: e. daughter chromosomes
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Quaternary ammonium compounds are disinfectants effective against
A. endospores. B. mycobacteria. C. non-enveloped viruses. D. Pseudomonas aeruginosa. E. enveloped viruses.
Because Amanda has cystic fibrosis, she is a frequent patient at her local hospital due to lung
infections. On one visit, she was infected with P. aeruginosa. In her lungs, these bacteria secrete a protective substance that forms a layer over the bacteria. This layer is likely a(n) __________.
a. biofilm b. histamine c. antimicrobial protein complex d. complement toxin
Which statement about SNPs in the human genome is true?
A) Most SNPs have an effect on phenotype. B) Any two human genome copies will have on average 3 million single nucleotide polymorphisms. C) SNPs refer only to deletions or insertions, not base substitutions. D) Most SNPs are located in the introns of genes, and thus effect phenotype.
The earliest anthropoid fossil appears to be:
a. Branisella. b. Eosimias. c. Dryopithecus. d. Aegyptopithicus. e. Ardipithecus.