The correct answer is H2 (hydrogen). H2 was not found in the atmosphere of the early Earth, while CO2, O2, and CH4 were.
When a bacterium picks up DNA from its environment, this is called transformation.
Oxygen (O2) was not found in the atmosphere of the early Earth. When a bacterium picks up DNA from its environment, this process is called transformation.
In the early Earth's atmosphere, gases such as carbon dioxide (CO2), methane (CH4), and hydrogen (H2) were present, but oxygen (O2) was not found in significant amounts. This is known as the reducing atmosphere. The absence of oxygen was due to the lack of photosynthetic organisms that produce oxygen as a byproduct.
When a bacterium picks up DNA from its environment, this process is called transformation. Transformation occurs when a bacterium takes up free DNA from its surroundings and incorporates it into its own genome. It allows for the transfer of genetic material between bacteria and can contribute to genetic diversity.
Learn more about atmosphere of the early earth and bacterial dna uptake here:
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Answer:
Christianity is the most widely practiced religion in Europe.
Explanation:
Christianity began to form as a religion after the death of Christ by his disciples. Christianity first started in the Middle East, which later spread in north and west of Europe by missionaries, merchants and soldiers. The Roman Emperor Constantine became a Christian by baptizing himself. Christianity became the official religion of the Romans Empire 10 years later. During the Medieval Period, Christianity put its stronghold in society and made regulations to guide people in the right path. Even today, people living in Europe practice Christianity than any other continent.
Answer:
true
Explanation:
took the test and got it right ;)
B. Ptolemy
C. Copernicus
D. Newton
2. Aristotle concluded that Earth was round because ____.
A. it always casts a curved shadow during a lunar eclipse
B. he sailed around the world
C. he calculated Earth’s circumference
D. it exhibited retrograde motion
3. The first early astronomer to propose a sun-centered solar system was ____.
A. Galileo
B. Newton
C. Copernicus
D. Brahe
The answers are:
A. Ptolemy
B. it always casts a curved shadow during a lunar eclipse
C. Copernicus
Ptolemy believed that the Earth was the center of the universe. He refined the model of Plato. He proposed that the planet has a small orbit called an epicycle and it moves along the a larger orbit that goes around the Earth.
Aristotle was convinced that the Earth was round because a lunar eclipse is caused by the shadow of the Earth. The shadow is always circular.
Copernicus was the first to propose the heliocentric model. He described the movements of the planets using astronomical theories which proposed the sun was at the center and not the Earth.
Answer:
being too connected could lead to a kind of cultural lock in where societies are oblivious to the existence of other ideas that could improve their fate
Russia
Japan
China
Portugal
United States of America