_______________ are constructed of all four basic tissue types.
(a) Organs.
(b) Systems.
(c) Cells.
(d) Organelles.
(a) Organs.
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Many introduced species have deleterious
effects on communities and ecosystems because a. coevolved parasites and competitors are absent. b. the introduced species are long-lived. c. predators prefer the introduced species; therefore, the local prey proliferate to dangerously high levels. d. the communities from which they came lost an important predator, competitor, or parasite. e. all of these occur
Respond to statements 71–75 in reference to the four kinds of
social behavior listed below. a. altruism b. cooperation c. selfish herd behavior d. subordination M 71. When the offspring of one brood of Florida scrubjays help their parents in taking care of their siblings in the next brood, this is an example of __________. M 72. When a clump of sawfly caterpillars rear up, writhe, and regurgitate toxic fluid after being disturbed, this is an example of __________. E 73. When two or more female lions attack a wildebeest together, this is an example of __________. M 74. When a colony of bluegill sunfishes compete for the safe sites at the center of the group, this is an example of __________. M 75. When a woman raises her brother’s children, this is an example of __________.
Organisms that are short rods or coccobacilli and obligate intracellular bacteria best describes:
A) Streptococcus pyogenes B) Helicobacter pylori C) Rickettsia prowazekii D) Mycoplasma pneumonia
How many copies of each chromosome will a tetraploid organism have?
a. 1 b. 2 c. 4 d. 8 e. 10