The role of arroworms in the pelagic ecosystem is to:
a. filter feed on small plankton.
b. link primary and higher consumers in the food chain.
c. prevent grazers from population explosions.
d. scavenge nutrition from dying animals.
e. recycle nutrients from detritus.
B
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The Krebs cycle occurs in the mitochondria. There are nine biochemical reactions involved in the Krebs cycle, and they are highly ordered. Select the correct order. (Note: These are abbreviated and do not show NAD, ADP, ATP, or FAD.)
A. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms beta-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate B. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms alpha-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms malate ® which forms fumarate ® which forms oxaloacetate C. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®which forms alpha-ketoglutarate ® forming citrate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate D. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms alpha-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate
In which of the following animals would you NOT find an endoskeleton?
A. starfish B. sea sponge C. crocodile D. shark E. beetle
The loudness of sound is measured in
a. millihertz. b. decibels. c. megahertz. d. watts. e. gigahertz.
Give the sex of the following organisms assuming that the autosomes are present in the normal number
Sex Chromosome Organism Complement Humans Drosophila XX ________ ________ XY ________ ________ XO ________ ________ XXX ________ ________ XXY ________ ________ Fill in the blank(s) with correct word