Malpighian tubules are the excretory system attached to the gut in
A. earthworms.
B. insects.
C. planarians.
D. humans.
Answer: B
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Light energy passes from phycobiliproteins to reaction centers in
A) cyanobacteria. B) green sulfur bacteria. C) purple bacteria. D) most photosynthetic bacteria.
Which cellular component is common to all cell types?
a. cell wall b. mitochondria c. cytoplasm d. nucleus e. endoplasmic reticulum
Biodiversity hotspots are defined by which two criteria?
a) species richness and size b) number of endemic species and degree of threat c) ecological diversity and species diversity d) size of distance from nearest alternative hotspot e) species richness and ecosystem integrity
If the sequence of bases in mRNA is U, C, A, the sequence of bases in DNA is
A. A, G, and U. B. A, G, and T. C. A, C, and A. D. T, G, and U.