GEOGRAPHY HIGH SCHOOL

About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____.oxygen became available from cyanobacteria

banded iron formations developed

meteorite impacts increased

the atmosphere got thicker from volcanic outgassing

Answers

Answer 1
Answer: The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.

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What is the greatest negative environmental impact that occurs when people live in suburbs instead of living in cities?

Answers

Maybe because they aren’t aware of their resource use? Or that Suburbanites don’t recycle?

Depending on its mass, it can take millions to trillions of years for a star to evolve from a main-sequence star to a red giant. Despite this astronomical length of time, astronomers are confident in their models of stellar evolution. Which of the following statements best describe why astronomers firmly believe that their models of stellar evolution are correct?

Answers

Answer: See explanation.

Explanation:

Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.

What is organic farming? Describe with an example

Answers

Answer:

Basically farming without any sort of chemicals.

Explanation:

Organic farming is a form of agriculture that relies on crop rotation, green manure, compost, and biological pest control. An organic farmer will still use fertilizers and pesticides, but strictly limit or exclude the use of synthetic fertilizers, pesticides, insecticides, herbicides, and fungicides.

What country accounts for most of the world's spinning and weaving?

Answers

China and India account for most of the world's weaving and spinning.

Which type of space probe is designed to move around on the surface of a moon or planet? A.
orbiter

B.
flyby

C.
rover

D.
lander

Answers

Correct answer is C. Rover

Rover was the type of Space probe, designed to move around on the surface of a moon or Planet.

On the map above, which oval circles the Nile River Valley?A.
oval A
B.
oval B
C.
oval C
D.
oval D

Answers

Answer:

Oval C

Explanation:

Answer:

oval c

Explanation:

the Nile river flows from Egypt to the south

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