Two Children Are Trying to Cross a Stream

question 11

Short Answer

Two children are trying to cross a stream. They want to use a log that goes from one bank to the other. If the left bank is 15 feet higher than the right bank and the stream is 20 feet wide, how long must a log be to just barely reach? __________ feet

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Definitions:

Fimbriae

Short, hair-like structures on the surface of some bacteria that help in attachment to host tissues and in the transfer of genetic material.

Electron Microscope

A microscope capable of producing high-resolution, highly magnified images through the use of an electron beam (rather than light). Transmission electron microscopes (TEMs) produce images of thin sections; scanning electron microscopes (SEMs) produce images of surfaces.

Actinomycetes

A group of Gram-positive bacteria known for their soil-dwelling habits and significant role in the decomposition of organic materials.

Peptidoglycan

A complex polymer found in the cell walls of most bacteria, providing structural strength and shape.