Scanning electron microscopes bombard specimens with a stream of electrons; however, the specimen image is produce by electrons that are derived from atoms of the specimen itself rather than by the electrons used to bombard the specimen.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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True kidneys have tubules called

a. nephrons. b. hepatic tubules. c. metanephridia. d. Malpighian tubules. e. protonephridia.

Biology & Microbiology

Which vessel carries blood from the small intestines to the liver?

a. inferior vena cava b. superior vena cava c. iliac vein d. hepatic vein e. femoral artery

Biology & Microbiology

The accompanying figure shows a pedigree and the results of a Southern blot analysis of the ?-globin gene for four family members (II-1, II-2, II-4, and II-5). III-2 was just born and neither her health nor her DNA has been analyzed

The figure also shows a restriction map of ?A and ?S alleles and the location of three DNA probes (A, B, and C). If III-2 is analyzed by Southern blot using the same probe(s) as that used on other members of the family, what is the probability that the result will be only one band? A) 0 B) 1/9 C) 1/6 D) 1/4 E) 2/3

Biology & Microbiology

In mammals, blood returning from the head will pass through the ________ just before entering the right atrium

A) left atrium B) superior vena cava C) inferior vena cava D) aorta

Biology & Microbiology