Al examinar la aleta de un pez primitivo, los científicos encontraron similitudes entre su estructura ósea y la de los reptiles, las aves y los mamíferos modernos. ¿Que tipos de evidencias describe este caso?

Answers

Answer 1

Answer:

evidencia de un antepasado común entre grupos de vertebrados (gnatóstomos)

Explanation:

En el estudio comparativo arriba descripto, se encontraron semejanzas que provienen de un antepasados común. Este tipo de evidencia se conoce como homología, es decir, semejanza entre diferentes grupos de organismos causada por un mismo origen evolutivo. Los gnatóstomos (vertebrados con mandíbula) conforman un grupo de organismos el cual incluye peces óseos, peces cartilaginosos, anfibios, reptiles, aves y mamíferos. En este caso, las extremidades del grupo de los gnatóstomos (las cuales tienen como origen común la aleta de un pez primitivo) son similares porque son estructuras homólogas.


Related Questions

Max is shining a flashlight at the wall. What happens?

Answers

I believe the answer is B
I think it’ll be Either B or C.

can someone help plssssssssssss

Answers

Answer:

Distrupted

Explanation:

the main flow of homestasis was "disrupted" as now some of the cells can't carry out the main bodily funtions.

Answer:

To this Extent - Distrupted

The main flow of homestasis was "disrupted" as now some of the cells can't carry out the main bodily funtions.

help me pleaaaasseee!!!?? explain how locusts affects crop production and how it can be prevented...​

Answers

I think this will help

Explanation:

good luck. :)

Can a single cell be living but not be an organism?

1. Yes
2.no

Answers

No, this is not possible.

How are the three international conflicts similar and how are they different?

Answers

Answer:

what's the question? It is not showing anything expect for "How are the three International conflicts similar and how are they different."

private sector international conflict would be a conflict between a U.S. computer company, and a Japanese company which was supplying motherboards for the U.S. company. If the Japanese company had a contract requiring them to ship 10,000 motherboards a month, but they only shipped 6,000, this would cause a private international conflict. It would not be a conflict that involved the U.S. government, but it would be one that would likely be handled in an international tribunal of some sort

Explain the process of how air flows through the Respiratory System? In three sentences.

Answers

Answer:

The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles these are called alveoli, and in birds they are known as atria. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.

Explanation:

PLEASE MARK ME AS BRAINLIEST

High levels of what substance found in the blood determines diabetes and prediabetes?

Answers

hi! higher blood sugar levels can determine diabetes and prediabetes!

hope this helps!:)

Answer: hemoglobins with sugar attached

Explanation:

why do exons have to be spliced together? I swear I'm so supi d lol. Please Help :)

Answers

because during slicing the introns are removed from the pre-mRNA & the exons are stuck together to form a mature mRNA that doesn’t contain the intron sequences

A plant developer wishes to develop a more popular apple. Several new varieties have shown up in the test orchard. The ideal fruit has comparatively thick, tough skin that resists pests and survives packaging and shipping. It has thick, tender flesh. It will have a small, delicate seed core. Which of the following is most likely to be chosen as a desirable variety to test further?
1. a fruit with a thick, tough endocarp and a thick, tender mesocarp
2. a fruit with a thin, delicate epicarp and thin, tough mesocarp
3. a fruit with a thick, tender epicarp and a thick, delicate endocarp
4. a fruit with thin, delicate epicarp and a large, thick endocarp

Answers

Answer:

A fruit with a thick, tough endocarp and a thick, tender mesocarp

Explanation:

Brainliest!!Which of the following sequences is the correct complementary DNA strand for ATGCTA?

Answers

Answer:

TACGAT

Explanation:

Guanine matches with cytosine

adenine matches with thymine

The answer is TACGAT.
Hope this helps

What would happen if a second universal flood occurs?

Answers

It would wipe out a lot of species, and when doing so, it could uproot trees, and be very, very fatal.
It would cause a total destruction and it would gonna affect everything.

What percentage of energy is lost as you move up trophic levels?​

Answers

Answer: 10 percent

Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.

Explanation:

hope this helps miss and have a great night

If an organism uses mitosis (asexual reproduction) to reproduce. What is the outcome?



A. The offspring are twice as large as the parent

B. The offspring are genetically identical to the parent

C. The offspring developed from a parents fertile egg

D. The offspring have half as many chromosomes as the parent

Answers

Answer:

B

Explanation:

I learned this 2 years ago

It b for sure hope it helps:)

Shortage of food plants, erosion of land, and decrease in oxygen levels are all effects of


Immigration


Deforestation


Mining


Trade

Answers

Answer:

Deforestation

Explanation:

I took this quiz and got a 100.

Cells come from other cells. Question 2 options: Sometimes False Never True

Answers

Answer:

This statement is true because cells have the capability to divide.

Answer:

It is true

Explanation:

I took the test its right

Polysaccharides are made of?

a. One glucose molecule
b. Many glucose molecules
c. Many fatty acids
d. DNA

Answers

Answer:

b. Many glucose molecules

Explanation:

poly means many

D definetly
Hopefully this helps you
May God bless you

A branch from a tree and a dichotomous key are shown below.

What type of tree produced the branch?
A. locust
B. ash
C. cedar
D. magnolia

Answers

A locust. This is the answer

The patient recovers his/her strength and return to his/her normal state of health.​

Answers

Answer:

good job

Explanation:

but what does this mean

What will determine whether or not mutations will be passed to offspring?

Answers

Mutations are only passed on to offspring when they occur in a germ cell DNA which are the cells that create sperm or ova...
will be inherited only if it occurred on a chromosome in either the sperm cell or the ova cell out of many that eventually unite to form a zygote

1. The St. Lucie River drains Lake Okeechobee into the Atlantic Ocean.

What is the relationship among the parts of this system?

Answers

Answer:

The St Lucie canal serves as an outlet of drainage for the Okeechobee Lake through the St Lucie River and out to the Atlantic Ocean.

Explanation:

The St. Lucie River is an estuary in Florida, in the United States. It was basically a freshwater system before an inlet was dug to provide access directly to the Atlantic Ocean.

Lake Okeechobee is the second largest freshwater lake in the United States. Water flows into the lake from various sources with Kissimmee River being the major source.

Because of the high levels of water in Lake Okeechobee, the St. Lucie canal was constructed in the 1920s. The St. Lucie canal provides a good outlet from the Okeechobee lake, through the St. Lucie River and out to the Atlantic Ocean.

What is the main source of Earth's light?

Answers

Answer:

The Sun

Explanation:

Answer:

The sun

Explanation:

The main source of light on Earth is the Sun. Sunlight provides the energy that green plants use to create sugars mostly in the form of starches, which release energy into the living things that digest them. This process of photosynthesis provides virtually all the energy used by living things.

what are phosphates?
plsss help

Answers

Answer:

mineral is a phosphate

Explanation:

Answer:

In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid H ₃PO ₄. The phosphate or orthophosphate ion [PO ₄]³⁻ is derived from phosphoric acid by the removal of three protons H⁺ .

Explanation:

1. Calculate the density of a piece of wood with a volume of 216cm3 and a mass
of 64g

Answers

Answer:

Density = Mass/Volume

Density = 216cm3/64g

Density = 3.375 g/cm3

Let me know if this helps!

3.3375 is the answer

This is for Earth and Space but that wasn't a choice to pick.

Which statement best explains the impact of unfavorable oceanic conditions on human behavior?

1. Boating activities decrease along shorelines.
2. Families move toward shorelines.
3. People spend less time playing at the beach.
4. Recreational water sports increase on beaches.

Answers

I think it would be the last one

PLEASE HELP, WILL MARK BRAINLEST

Examine the following image. Which ocean-floor feature is indicated by the arrow in the image?

A diagram showing a location where seafloor spreading occurs

Public Domain

Guyot
Mid-ocean ridge
Seamount
Trench

Answers

Answer:

Its a guyot.

Explanation:

That picture on the screenshot looks like the one I put in

Answer:

guyat

Explanation:

All the different organisms that interact in a pond make up

A a community

B the water cycle

C a population

D the habitat

Answers

It would be C a population
All the inhabitants of a particular town, area, or country.
The population of frogs are pretty difficult to catch :)
Hope this helps!

8. Which of these is the direct result of an error in the transcription of a DNA

nucleotide?

A. Amino acids do not bond to tRNA.

B. Transportation of mRNA does not occur.

C. The nuclear membrane is ruptured.

D. RNA sequence is incorrect.

CLEAR ALL

Answers

Answer:

D. RNA sequence is incorrect.

Explanation:

Genome editing can be defined as a high-tech process which avail scientists the opportunity or ability to remove (delete), replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.

Transcription can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.

When a RNA sequence is incorrect, it leads to an error in the transcription of a DNA nucleotide.

This ultimately implies that, an error in the transcription of a DNA nucleotide is the direct result of an incorrect codon sequence (RNA nucleotides).

Which of the following objects absorbs the most light?

Answers

Answer:plants

Explanation:

Answer:

D a wool carpet

Explanation:

is the answer

Matching list - biology

Answers

1.B 2.A 3.C That’s the exact answer in order

8. Outline the process of metaphase, inclusive of the role of microtubules and the centromere.

Answers

Answer:

Chromosomes are positioned in the middle of the cell during metaphase.  

Explanation:

During metaphase, the centrosomes are at opposite poles or sides of the cell.  The spindle apparatus is formed and the nuclear membrane has dissolved.  The spindle fibers, also known as microtubules have lined up the chromosomes along the equatorial plate in the middle of the cell so each sister chromatid faces opposite directions.  The sister chromatids are still connected by the centromere, and this is the last time they are connected during this division.  The centromere is also where kinetochores assemble, and kinetochores are the sites of attachment for microtubules to pull the sister chromatids apart.  They are important for the cell to be able to divide.  

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