Biology, 03.07.2019 00:30 deedy8095

Which describes oxygen content as earth evolved over time? oxygen levels sharply declined about 400 million years ago. oxygen levels stay above 15 percent starting 200 million years ago oxygen levels remain below 5 percent starting 1000 million years ago. oxygen levels raise significantly between 1000 and 700 million years ago.

Answers: 2

Show answers

Another question on Biology

Biology, 21.06.2019 22:50

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Answers: 1

Answer

Biology, 22.06.2019 02:00

How does an angiosperm prevent self pollination

Answers: 1

Answer

Biology, 22.06.2019 04:30

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Answers: 3

Answer

Biology, 22.06.2019 15:20

Which action is a reflex action. a. asking for coffe in a cold climate b. blinking when light is flashed in the eyes c. drinking water when thirsty. d. swallowing food e. taking an exam

Answers: 2

Answer

You know the right answer?

Which describes oxygen content as earth evolved over time? oxygen levels sharply declined about 400...

Questions

English, 29.10.2020 04:10

How do paragraphs 18-20 contribute to the development of the theme? A They illustrate that the people do not know what will result from t...

Mathematics, 29.10.2020 04:10

Calculate the five-number summary and the IQR from the following values given: {17 20 21 25 25 29 40}...

Mathematics, 29.10.2020 04:10

If DEF is congruent to JKL, DE = 18, EF =23, DF = 9x-23, JL = 7x-11, and JK = 3y-21, find the values of x and y...

English, 29.10.2020 04:10

What was Greg’s new idea for making money at school? In book lunch money?...

English, 29.10.2020 04:10

What are some tangible (capable of being touched or felt) symbols for freedom? I'll mark brainliest for the best answer, tysm....

Mathematics, 29.10.2020 04:10

You, yes you help me pls✨ ...

Mathematics, 29.10.2020 04:10

HELPP MEEE PLEASE SO YOU CAN HELP ME GET MY ALBUMS BACK AND POSTERS AND EVERYTHING

Mathematics, 29.10.2020 04:10

The displacement from equilibrium of a weight oscillating on the end of a spring is given by y = 1.93 -0.220 cos(4.90) where y is the dis...

Mathematics, 29.10.2020 04:10

Solve the following equation for t: 5 ln (4t) = 16...

Mathematics, 29.10.2020 04:10

The LCM (12, 15, 20, k) = 420. What is the least possible value of k?...

Health, 29.10.2020 04:10

6. How do the different steps in each system affect the environment? Use the chart to list the effects in each system. Industrial: Local:...

Mathematics, 29.10.2020 04:10

Bamboo is one of the fastest-growing plants. A typical growth rate for bamboo in temperate climates is 3-10 centimeters per day during the growth seas...

Computers and Technology, 29.10.2020 04:10

2. Describe one communication strategy that Jacey when presenting the idea to her supervisor....

Computers and Technology, 29.10.2020 04:10

I WILL MARK BRAINLIEST I AM CRYING PLEASE HELP GUYS WITH RIGHT ANSWERS.

History, 29.10.2020 04:10

Assertion: There were political causes of the Protestant Reformation. Proof 1: Powerful monarchs challenged the church as the supreme power in E...

History, 29.10.2020 04:10

Things the British increased taxes on...

Mathematics, 29.10.2020 04:10

An athlete runs 8 miles in 50 minutes on a treadmill. At this rate: How long will it take the athlete to run 9 miles?...

Mathematics, 29.10.2020 04:10

6x3(4/2)+1 extra characters...

English, 29.10.2020 04:10

I knew i had stayed out too late when the sun emerged from the east...

Mathematics, 29.10.2020 04:10

A grocer carefully lifts a 100 N crate of apples a distance of 1.5 m to a shelf in 2.5 seconds. What is his power output?...

More questions: Biology Another questions