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3 years ago

How could one determine if two unidentified organisms share a common ancestor?

Biology

1 answer:

Neko [114]3 years ago

4 0

Answer:

Evolutionists determine that two organisms have a common ancestor is by looking at fossil evidence in different rock layers using the law of Superposition (Oldest layers are on the bottom, newest are on the top) and compare the skulls or other bones to each other in order of oldest to newest (or newest to oldest). Another way to determine this is to examine the amount of DNA a certain species shares with another species. An example of this would be that Humans share roughly 90% of our DNA with chimpanzees or the other Great Apes.

Explanation:

DNA

They can look at the DNA it's the most common one.

There are 4 pieces of evolution and they are

Fossils , Geography , Embryos / DNA , Anatomy

Fossils: Physical remains of species , Determine age, location, environment

Deeper layers = older

Geography: Proves species share common ancestors, depending on where

they live

DNA: BEST evidence because it’s the MOST ACCURATE

Similarities in the early stages of development

Similarities in DNA

More similarities = closely related

More differences = not related

Anatomy: Compare body parts of different species to see how they evolved

3 different structures:

Homologous (same structure, different function)

Analogous (similar structure, different organisms)

Vestigial (body parts that no longer serve a purpose)

All of that are in evolution

Hope it helped! ( Gave u my biology notes :D)

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Which of the following describes the path of blood between the heart and the lungs?

Veseljchak [2.6K]

the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again

5 0

3 years ago

Which statements accurately describe the roles of decomposers in the carbon cycle?

ollegr [7]

Answer:

The question is incomplete, here's the complete question;

Which statements accurately describe the roles of decomposers in the carbon cycle? Check all that apply.

-Decomposers release carbon dioxide into the air as waste.

-Decomposers remove carbon dioxide from the air during photosynthesis.

-Decomposers break down the remains of dead plants and animals.

-Decomposers return carbon compounds to the soil.

-Decomposers use carbon to make food molecules.

The correct answer is;

Decomposers release carbon dioxide into the air as waste.

Decomposers break down the remains of dead plants and animals.

Decomposers return carbon compounds to the soil.

Explanation:

In the earth, all living things are made up of carbon. Carbon cycle is the process in which carbon travels from the atmosphere into living things in the earth and then returned into the atmosphere. Carbon is released into the atmosphere through processes like respiration, decomposition, combustion etc. The carbon cycle explains how carbon is stored, made available to living things and replaced on earth. Plants absorb carbon in the form of carbon dioxide from the atmosphere and use it to produce food (glucose) and release oxygen in a process called photosynthesis. When animals feed on these plants , the carbon is transferred to them and thus passes it along the food chain. During respiration, animals release carbon dioxide back into the atmosphere. When the organisms eventually die, the carbon from them is put back into the atmosphere by decomposers so that other living organisms can use it. Decomposers break down dead organisms , releases carbon dioxide through cellular respiration and enriches the soil with nutrients. The examples of decomposers are bacteria, fungi and worms. Bacteria decomposes most types of organic matter. Fungi are the main decomposers in the forest as they break down wood and the cellulose in plant cell walls. Decomposers are very important because they release carbon locked up in the dead organisms back into the atmosphere and without carbon dioxide in the atmosphere plants can not produce glucose and oxygen.

8 0

3 years ago

Jasmine earned $150 last week.Jay earned $130 last week. they combined their money and decided to donate 1/4 of their total amou

vova2212 [387]

Last night Jasmine and Jay amount combined is $150+$130=$280
amount donated to charity is 1/4 of $280= $70
amount spent at an amusement park is` 40/100 x $210= $84
the remaining money = 280- (70+84)= $126

35% of their original amount is 35/100x$280=$98

so Jay's claim is not correct because the remaining money is $126 and not $98 as she Jay claims.

8 0

3 years ago

What is the purpose of cellular respiration?

swat32

A. Break down sugars to use their energy directly

4 0

3 years ago

Match the elements to the type of cycle that they possess Carbon Sulfur Oxygen Nitrogen Phosphorus Sedimentary Cycle or Gaseous

Aleks04 [339]

Answer:

Sulfur, phosphorous.... sedimentary cycle.

Carbon, oxygen and nitrogen.... gaseous cycle

4 0

3 years ago