All of the following are true EXCEPT one. Choose the exception
A) The great diversification of animals occurred during the Cambrian explosion.
B) For most of biological history, life was confined to aquatic habitats.
C) The evolution of multicellularity took place after the origin of the eukaryotes.
D) The first organisms to colonize land were animals.
D
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The descending portion of the loop of Henle is
A. permeable to water and impermeable to sodium. B. permeable to water and permeable to sodium. C. impermeable to water and permeable to sodium. D. impermeable to water and impermeable to sodium. E. the site of active transport of water.
A plant cell with a ?P???0.2 MPa maintains a constant volume when bathed in a solution that
has a ?S????0.2 MPa and is in an open container. What do you know about the cell?
a. The cell has a ?S???0.4 MPa. b. The cell has a ?S????0.2 MPa. c. The cell has a ?S????0.4 MPa. d. The cell has a ?????0.4 MPa. e. The cell has a ????0.2 MPa
Which cell is NOT haploid?
a. polar bodies b. primary oocyte c. secondary spermatocyte d. spermatids e. sperm
Which is incorrect about Yersinia pestis?
A. exhibit bipolar staining B. gram negative rod C. produces coagulase D. has a capsule E. produces enterotoxin