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2 years ago

The first form of life on Earth was created from (2 points)

2 answers:

6 0

The earliest known life forms on Earth are putative fossilized microorganisms found in hydrothermal vent precipitates. The earliest time that life forms first appeared on Earth is unknown.

Vinil7 [7]2 years ago

3 0

The first living form of life on this planet was created from dust and the being was man.

But The Physics of the Universe website says this: "The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself."

Hope I helped!

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En que se diferencia el transporte en masa del transporte mediado por bombas

Drupady [299]

Answer:

dontknobecauseitsnotenglish

Explanation:

i pefer english

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2 years ago

What is the most important distinction between the membrane transporters known as channel proteins and those known as carrier pr

-Dominant- [34]

Answer:

Channel proteins form hydrophilic channels to passively transport substances down the concentration gradient.

Carrier proteins bind to substances to transport them actively against the concentration gradient. They do not form channels.

Explanation:

Channel proteins are the membrane proteins that serve in transport of small polar molecules and/or ions by making a hydrophilic pore across the membrane. These molecules diffusion through the pore and exhibit facilitated diffusion.

Carrier proteins are the membrane proteins that transport the substances across the membrane by binding to them. They do not form the hydrophilic channels. Carrier proteins serve in the active transport of molecules against the concentration gradient.

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3 years ago

Some problems with use of DNA analysis for forensic evidence may occur because of

alisha [4.7K]

Answer: Option D " all of the above "

Explanation: DNA can be a great source of information when used as a forensic evidence. This technique has many advantages and disadvantages when used as a source of information in case of crime.

Identical twins: There are some common fragments of DNA that is same in identical twins so it can be a difficulty in deciding the criminal.

Not enough of a sample: DNA should be present in a detectable amount to be used an sample for evidence, less than this detectable amount is a waste and cannot be used as a sample for evidence.

Contaminated and degraded sample: If the sample of DNA is contaminated or degraded then the result might be incorrect and might not be used as a sample for forensic evidence.

Hence, the correct answers are all of the above.

4 0

2 years ago

How do erosion and deposition shape the earth’s surface? I will mark 1st person to answer brainliest and you get 86 points!!!

Tanzania [10]

Answer:

The material moved by erosion is sediment. Deposition occurs when the agents (wind or water) of erosion lay down sediment. Deposition changes the shape of the land. ... Water's movements (both on land and underground) cause weathering and erosion, which change the land's surface features and create underground formations.

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2 years ago

What is a vestigial structure? A. A structure that has no use in the organism B. A structure with similar shape but a different

krek1111 [17]

Answer: A, a structure that has no use in the organism

Explanation:

A vestigial structure is an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species.

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3 years ago