What would be the most obvious outcome of repeated cell cycles consisting of S phase and M phase only?
(a) Cells would not be able to replicate their DNA.
(b) The mitotic spindle could not assemble.
(c) Cells would get larger and larger.
(d) The cells produced would get smaller and smaller.
(d) The cells produced would get smaller and smaller, as they would not have sufficient time to double their mass before dividing.
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Testcrosses are used to determine the genotype of an organism.
a. true b. false
The digestive sac of a jellyfish has ________ opening(s)
A) one B) two C) three D) four
All of the following involve active transport across membranes except
A) the movement of mineral nutrients from the apoplast to the symplast. B) the movement of sugar from mesophyll cells into sieve-tube elements. C) the movement of sugar from one sieve-tube element to the next. D) the movement of K+ across guard cell membranes during stomatal opening. E) the movement of mineral nutrients into cells of the root cortex.
Which of the following is not a reason why healthcare epidemiology is essential to quality care?
A) Healthcare-acquired infection incidence increased by almost 40 percent from 1975 to 1995. B) Hospitals have been inadvertent sources of infection for thousands of years. C) About 75,000 people die from healthcare-acquired infections every year. D) Healthcare staff are dedicated to helping patients heal. E) Healthcare-acquired infections add an extra $35 billion dollars per year to U.S. healthcare costs.