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3 years ago

Which of the following statements best characterizes a difference between GM food and organically grown food?

2 answers:

8 0

The answer to your question would be B. This is because GM stands for genetically modified, which means it is not natural. And that is why people prefer organic food if they can afford it, because they don't want to eat food that is not natural. Hope this helps! :D Feel free to ask more questions.

Mice21 [21]3 years ago

5 0

the answer on ed2020 is B.

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What is physical water scarcity

GrogVix [38]

It occurs when and where there is not enough water to meet both demands and those of ecosystems to function effectively.

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4 years ago

Read 2 more answers

A particle called the pi-meson is made from an up quark and an antidown quark. What is the charge of this particle?

Nostrana [21]

Answer:

Positive Pion, Negative Pion and Neutral Pion

Explanation:

Pi-meson or also known as pion is one of any of the three (3) subatomic particles which characterizes of being unstable of its nature. The charged pions

π+

and

π−

decay with a mean lifetime of 26.033 nanoseconds or 2.6033×10−8 seconds, and the neutral pion

π0

decays with a mean lifetime of 84 attoseconds (8.4×10−17 seconds).

8 0

3 years ago

Discuss the geologic processes that formed the continents during the precambrian era.

butalik [34]

Answer: The Precambrian Era comprises all of geologic time prior to 600 million years ago.

Explanation: The Precambrian was originally defined as the era that existed before the emergence of life in the Cambrian Period. It is known that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time.

7 0

3 years ago

plains rise in elevation to about 5,000 feet but begin slightly above: the mountains the plateaus sea level

Sergeu [11.5K]

Answer: plateaus.

Plateau is a large extension of high and quite flat land.

3 0

3 years ago

Major events in trassic period

Yuri [45]

Answer:

Both the start and the end of the Triassic period is marked by some really interesting and important events. Major events were:

1. The major extinction event

2. Splitting of Pangaea

3. Expansion of animal life

4. Massive change and rejuvenation (appearance of Mammals)

Explanation:

The Triassic is a geologic period and system which took place 251 to 199 million years ago. The Triassic is the first and shortest period of the Mesozoic Era.

1. The major extinction event

Triassic period (and the Mesozoic era) didn’t exactly have such a glorious start. Violent volcanic eruptions, climate change, a fatal run-in with a comet/asteroid had set off the extinction of more than 90% of Earth’s species.

2. Splitting of Pangaea

By the start of the Triassic, Pangaea was already formed as a supercontinent shaped like a giant C. Almost as soon as the supercontinent formed, it started cracking. By the end of the Triassic period, 199 million years ago, tectonic forces had started splitting the supercontinent in two (Laurasia in the north and Gondwana in the south). The ocean called Tethys filled the “C” and that’s how the splitting of Pangaea started. Interesting thing to know is that earlier failed attempts of splitting formed rift valleys in North America and Africa that are today very rich in the best preserved fossils of Triassic life.

3. Expansion of animal life

There is a long list of animals that existed or first appeared in the Triassic period.

The oceans were filled with the coiled-shelled ammonites, mollusks, and sea urchins that survived the Permian extinction and were quickly diversifying. The first corals appeared! Although, some other reef-building organisms were already present.

Other amazing creatures were: dolphin-shaped ichthyosaurus, plesiosaurus, fish, ancient squid, phytoplankton (two of the major groups still in the ocean today first appeared), frogs, salamanders, crocodiles, turtles, snakes, pterosaurs (a group of flying reptiles), moss, ferns, spiders, scorpions, centipedes (thrived), grasshoppers (first appeared), etc. As I said, the list is very long.

4. Massive change and rejuvenation (appearance of Mammals)

Last but definitely not least characteristic of the Triassic is that it was the time of tremendous change and rejuvenation. Life that survived the so-called Great Dying repopulated the planet and gave rise to new creatures, such as rodent-size mammals and the first dinosaurs.

Perhaps the biggest changes came with the evolution of dinosaurs and the first mammals in the late Triassic, starting around 230 million years ago (Eozostrodon, Coelophysis, Plateosaurus)

The Triassic finished in the same way it began. Something, perhaps a volcanic belch or an asteroid collision caused another mass extinction. Dinosaurs, however, survived and went on to dominate the Jurassic. And the rest is history. :)

3 0

4 years ago