Germ layers are

A. layers infected with bacteria.
B. embryonic layers with different developmental potentials.
C. layers of cells surrounding the egg prior to fertilization.
D. colonial protists arranged in layers.
E. layers of gametes.


B. embryonic layers with different developmental potentials.

Biology & Microbiology

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Which of the following does not inactivate an X chromosome?

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Atrazine is used as a(an)

a. pesticide. b. fertilizer. c. herbicide. d. substitute for PCBs. e. insect repellent

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The region where a skeletal muscle cell and a motor neuron come into close proximity to one another is the ________

Fill in the blank(s) with correct word

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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

Biology & Microbiology