A measurement of a microbe is reported as 1 × 10-6 m, also known as
A) centimeters (cm).
B) millimeters (mm).
C) micrometers (?m).
D) nanometers (nm).
E) yards.
C
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Bilateria are characterized by
A. a plane of symmetry that forms mirror images around a vertical plane in the midline. B. a plane of symmetry that forms mirror images around a horizontal plane in the midline. C. a plane of symmetry around a transverse plane across the center of the body so that the front and back halves are mirror images. D. a plane of symmetry that forms mirror images around an oblique plane in the midline. E. a plane of symmetry that forms mirror images around any plane through the longitudinal midline of the body.
A phylogenetic tree is shown in part (b) of the image above. Phylogenetic trees visually represent hypotheses of the evolutionary relationships and ancestry of species or species groups. In this case, Najash is placed in proposed context with other snake species, representing different groups of snakes around the world. What can you conclude about the evolution of sea snakes and the Najash species?
A. The phylogenetic tree shows that Najash, lower in the diagram, had the fossil marine snakes in its ancestry. B. Najash diverged separately and earlier than the three fossil marine snakes, indicating only a weak evolutionary relationship. C. All of these answer options are correct, except that Najash did not have fossil marine snakes in its ancestry. D. Najash is proposed as a separate group from other snakes, while the three fossil marine snakes are more similar to living snakes. E. Both Najash and the three fossil marine snakes have ancestry traced back to an original snake species.
The failure of which organ affected by a defective CFTR protein is likely to cause death in cystic fibrosis patients?
a. lungs b. intestines c. heart d. liver e. reproductive system
In an attempt to control aphids that are destroying his plums, a farmer in Iowa imports a colony of Asian ladybugs that feast on the aphids. The Asian ladybugs are not eaten by the local bird populations
The Asian ladybug population multiplies quickly, displaces the local ladybugs, eliminates the aphids, and begins to eat other local insects. The Asian ladybug A) is responsible for habitat fragmentation in the plum orchard. B) is a threatened species. C) is increasing the biodiversity of the orchard. D) is being overexploited. E) qualifies as an invasive species.