What is the key observational evidence that supports the idea that life on Earth has evolved through time?
The fossil record
, revealed in geological layers of different ages, shows that life on Earth has become more complex over time.
What is the earliest evidence of life on Earth quizlet?
Fossils of stromatolites in Australia date back
over 3.4 billion years are among the earliest evidence of life on Earth.
Which of the following hypothetical observations would force us to reconsider the theory of evolution?
Which of the following hypothetical observations (none of which are real) would force us to reconsider the theory of evolution?
The discovery of fossils of human-like primates dating to a time before the earliest dinosaurs existed.
What key factors have given Earth long term surface habitability check all that apply?
Key additional factors that have given Earth long-term habitability include
being large enough for out gassing to produce an atmosphere
, having plate tectonics for climate stability, and having a *magnetic field that shields the atmosphere from the solar wind.
Which statement explains the observations that make it seem possible that Mars could have life underground?
Which statement explains the observations that make it seem possible that Mars could have life underground?
We have detected water ice on Mars, and Mars still has some volcanic heat.
In Part A you found that the terrestrial planet 10 AU from a 0.5MSun star is unlikely to be habitable.
What are the factors affecting the changes in evolution?
Construct an explanation based on evidence that the process of evolution primarily results from four factors:
(1) the potential for a species to increase in number
, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the …
Has macroevolution been observed?
1)
No empirical proof
exists that macro-evolution (that is, evolution from one distinct kind of organism into another) is occurring at present, or has ever happened in the past. No one, throughout recorded history, has ever seen it.
What was one of the earliest forms of life?
Prokaryotes
were the earliest life forms, simple creatures that fed on carbon compounds that were accumulating in Earth's early oceans. Slowly, other organisms evolved that used the Sun's energy, along with compounds such as sulfides, to generate their own energy.
What are the oldest life forms on Earth?
The earliest known life forms found on Earth are
fossils of microorganisms
in 3.46 billion year old rocks in Western Australia. Life forms, as microorganisms, may have lived much earlier.
What are the earliest life forms identified on Earth and they date back to nearly 3.5 billion years ago quizlet?
3.8 to 2.5 billion years ago.
Bacteria
have been found dating back to 3.5 billion years ago. This is the first time that life appeared on Earth, according to the fossil record. Rocks began to cool enough for continents to form.
Which is the only planet that can sustain life?
Nonetheless,
Earth
is the only place in the Universe known to harbor life.
Is Earth the only planet with life?
The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. …
Earth is the only planet known to maintain life
.
What is the closest habitable planet?
[+] Powerful flares eject from Proxima Centauri with regularity, impacting the star's planets almost daily. What is life like on
Proxima b
? This planet in the next star system along is, at just four light-years, by far the closest Earth-like planet we know about.
Can we breathe on Mars?
The atmosphere on Mars is
mostly made of carbon dioxide
. It is also 100 times thinner than Earth's atmosphere, so even if it did have a similar composition to the air here, humans would be unable to breathe it to survive.
Can we plant trees on Mars?
Growing a tree on
Mars will surely fail with time
. The Martian soil lacks nutrients for soil growth and the weather is too cold to grow a tree. … The conditions of Mars do not affect Bamboos because the Martian soil serves as a support for them, and it doesn't need enough nutrients for it to grow.
What are the 2 types of Jovian planets?
Taking its name from the Roman king of the gods – Jupiter, or Jove – the adjective Jovian has come to mean anything associated with Jupiter; and by extension, a Jupiter-like planet. Within the Solar System, four Jovian planets exist –
Jupiter, Saturn, Uranus and Neptune
.
