Which of the following would bear the most resemblance to Archaeopteris, an ancient plant genus that preceded gymnosperms and angiosperms?
A. A ginkgo lacking vascular tissue.
B. A pine tree that does not produce cones.
C. A cycad that does not produce coralloid roots.
D. A grass species that lacks flowers.
E. A sunflower that does not produce endosperm.
B. A pine tree that does not produce cones.
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Each day the animals of the deep scattering layer
a. must form mucus nets to protect themselves from predators. b. make a nocturnal migration to the DSL to feed. c. make a nocturnal migration to the epipelagic to feed. d. make a daytime migration to the epipelagic to feed. e. migrate to a depth of 1.6 km to feed.
The letter "A" in the above figure represents
a. humerus b. pectoral girdle c. skull d. sternum e. pelvic girdle
The prokaryotic flagellum has three parts: the ________, the hook, and the basal body.
Fill in the blank(s) with the appropriate word(s).
Different types of data may suggest that microbes are synthesizing a particular metabolite, like the toxin microcystin. How confident would you be that the microbes are CURRENTLY synthesizing microcystin, based on the following data? Rank the data in order from "not confident" to "highly confident".A. Metaproteome analysis finds enzymes for the toxin synthesis pathway.B. Whole metagenomic sequencing finds genes for the toxin synthesis pathway.C. Amplicon analysis identifies species closely related to Microcystis.D. Meta-metabolome analysis finds intermediate molecules for the synthesis pathway, as well as the toxin itself.E. Metatranscriptome analysis finds mRNAs for the toxin synthesis pathway.
A. D, E, C, A, B B. C, B, E, A, D C. B, A, E, D, C D. A, B, D, E, C