A)_________ adjust focus by changing its thickness through contraction of Ciliary muscle, known as (B)_____________.
a. (A) lens, (B) accommodation
b. (A) retina, (B) accommodation
c. (A) lens, (B) adaptation
d. (A) retina, (B) adaptation
Answer: a. (A) lens, (B) accommodation
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The fluid that makes up little over half of blood. _____ 2) The platelets, white blood cells, and red blood cells in the blood. _____ 3) Blood cells that remove wastes, toxins, or damaged cells from the body. _____ 4) Without these cells, you couldn't provide your tissues with oxygen. _____ 5) Leukocytes that contain granules in the cytoplasm that function to destroy invading bacteria or other pathogens. _____
A) Granulocytes B) Plasmin C) Basophils D) Formed elements E) Plasma F) Red blood cells G) Agranulocytes H) White blood cells I) Platelets J) Stem cells
The alternate forms of a gene are called
A) chromosomes. B) loci. C) alleles. D) genomes.
It has been estimated that as many as ________ of the Bacteria in seawater are killed by bacteriophages each day
a. 5 percent b. 10 percent c. 50 percent d. 90 percent
In 1940, two researchers named Weiner and Landsteiner discovered that about 85 percent of the human population sampled possessed a blood cell protein that had been previously detected in Rhesus monkeys. This blood type was labeled Rh positive, and Rh+ was found to be dominant over the absence of the blood factor (Rh-). Under normal Mendelian inheritance, which of the following statements is FALSE?
A. An Rh- child would require that both parents be carriers of at least one Rh- gene. B. Two Rh- parents could have an Rh+ child. C. It is possible with just one pair of parents to have children where some siblings are Rh- and some are Rh+. D. Two Rh+ parents could have an Rh- child. E. All of the choices are false.