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Andre45 [30]
3 years ago
6

A thin section of bacteria sample is cut with a knife and exposed to an electron beam during:

Biology
1 answer:
nordsb [41]3 years ago
7 0

Answer:

Out of the four given options

option e) Transmission Electron Microscopy

is correct

Explanation:

A thin bacteria sample section is cut with the help of a knife and then exposed to a beam of electron in TEM.

Transmission Electron Microscopy, abbreviated as TEM is a technique of microscopy in which an electron beam is emitted and is made to pass through a specimen which is an ultra thin(less than 100 nm in thickness)resulting in the formation of an image and then this image is then enlarged and focused on a fluorescent screen or on any imaging device.

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Which example describes life in the mesozoic era
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This is the second of three geologic eras squeezed into the Phanerozoic ("Evident Life") Eon that covers the last 10% of Earth's whole geologic history. This is the era we all think of when we imagine the Ancient Earth! Rampaging dinosaurs! Dive-bombing pterodactyls! Endless forests of giant ferns! Erupting Volcanoes! (Sorry, no cave men! They didn't show up until the end of the Cenozoic.)

The Mesozoic Era lasted about 180 million years, from about 245 million years ago to about 65 million years ago. The Mesozoic is divided into just three time periods: the Triassic, the Jurassic, and the Cretaceous. Since lots of things were going on in each time period, we can only summarize the events. You can learn more by going to your library or searching the Internet for words like "Mesozoic" or the names of each of the periods.

In the view above, we see Earth in the middle of the Jurassic Period, in mid-Mesozoic times (sort of a middle-middle view). The supercontinents Gondwanaland and Laurasia collided some time back to form a single super-super continent called Pangea ("All-Earth"). But plate tectonics continues its irresistible motions, and even as we look, Pangea is beginning to break up into the continents we know now. At upper left, North America is just breaking away from the northwest coast of Africa, and the Atlantic Ocean and Gulf of Mexico are beginning to form. The Appalachian Mountains of the eastern United States are a high, rugged mountain range, something like the Rocky Mountains of today. Over the next fifty million years or so, South America, India, and Antarctica will all break away from Africa and move toward their present positions.

Life is diversifying rapidly, and beginning to look familiar. The dominant animals on both land and sea are reptiles, the most famous of which are the dinosaurs. Dinosaurs began in the Triassic, spread during the Jurassic, and dominated Earth in the Cretaceous. They are so prominent that the Mesozoic is also called "The Age of Reptiles." But dinosaurs are not the only life form around: birds and mammals also appear during the Mesozoic, as well as deciduous trees and flowering plants.

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seems based on text above, most correct is "A" definitely not "C"
8 0
3 years ago
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Answer:

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