Which of these are common theories that explain how the First Americans came to North and South America?
Check all that are true.

They traveled across the ocean on boats.

They built a land bridge.

They rode across the ocean on large animals.

They migrated across Beringia.

Answer:

It allowed us to put a formation date on some geologic crossections

Explanation:

Absolute dating is a newer way of evaluating the chronology of historical events by assigning numerical ages to them. The age thus assigned might not be the exact age but it is still closer to the real age.

It is unlike relative dating techniques which simply give the chronology or order of past events instead of the exact dates. Relative dating techniques have been in use before the emergence of absolute dating techniques in the twentieth century.

Answer:

b is the correct answer

Answer:

Explanation: I tried to use the answer that was on there and it was wrong so I got that answer wrong luckily it tells the the correct answer

Answer: Answer is explained below.

Explanation:

Solar system formation put in order:

Hope this helps someone. Good luck everyone!  

*Karma will go after the next person who deletes my answer. How dare you!

Answer:

The answer is eukaryotes

Explanation:

This is correct because prokaryotes means NO nucleus And Eukaryotes means yes it does have a nucleus

Pro-No

Eu-Yes

Answer:

Eukaryotes

Explanation:

Answer:true

Explanation:The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients. Each villus transports nutrients to a network of capillaries and fine lymphatic vessels called lacteals close to its surface.

Answer:

determined

Explanation:

Determined cells are embryonic cells that will generate all the cell types of the adult organism, with this process being independent of environmental inputs. Cell determination is defined by specific gene expression patterns in embryonic cells. In consequence, cell determination is defined as a genetic process where a particular cell fate can be broken down into two different states: specified (committed) or determined. If a cell is in a committed/specified state, the cell's fate can still be reversed or transformed, while if a cell in a determined state, the cell's fate cannot be reversed or transformed.

Answer:

As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. ... This rock (basalt) becomes a new part of Earth's crust. Mid-Ocean Ridges. Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.

High tide is occurring on the sides of the Earth that are closest to and farthest from the Moon. The correct option is D.

When the sea or a river reaches its greatest level and moves the farthest up the beach or the bank, it is said to be at high tide.

The gravitational forces that try to pull the water away from the moon are resisted by the water that is travelling away from the moon.

On the far side of the Earth, where the moon's gravitational pull is weaker, inertia triumphs, the ocean swells, and high tide happens.

The rise and fall of the sea's surface on a regular basis is what tides, which start in the oceans, appear as as they move toward the coastlines.

High tide is when the wave's highest portion, or crest, reaches a specific area; low tide is when the wave's lowest portion, or trough, happens.

Thus, the correct option is D.

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Answer:

This question is incomplete

Explanation:

This question is incomplete. However, it should be noted that the idea of blocking the drainage, which could cause waterlogging (since the water will not be able to leave the field), is a type of irrigation that ensures there is sufficient amount of water for the plants to grow during a growing season. Although, some plants do not grow well in environments like this (in the case of waterlogging) because this environment lowers oxygen level in the root o the plant (caused by the water at the top of the soil).

Planetary scientists are pretty sure that Mercury, Venus and Mars also have these layers. ... Not just planets have a core, mantle and crust. Several moons in our solar system have them! The Moon has a core and mantle similar to Earths but the crust is basaltic rock.

Hope it helps you

Answer:

Planets have different layers because different materials have different densities.

Explanation:

Density comes into play on how heavy matter is at a certain size. The planets formed as dust, gas, asteroids and comets collided together.Around the metal cores, the planets have a mantle and crust made of rock

Answer:

Oxygen, air, oxygen from the air, oxygen from air and the second part is synthesis

Explanation:

Got it on edge

Answer:

Oxygen, air, oxygen from the air, oxygen from air and the second part is synthesis

Explanation:

dude above jus said it

Answer:

move 3 to the first 2 form last

Explanation:

Answer:

C. endoplasmic reticulum

Explanation:

I don't have any notes on this but research says C! Hope this helps :)

Answer:

true

Explanation:

Answer:

True

Explanation:

Answer:

Explanation:

Some especies are protected by law from being hunted because if there not people would just keep on hunting them to extinction and also these kind of species are rare because people hunted alot of them

please mark brainly

Answer:

There are three types of connective tissues, loose connective tissues, dense, and hyaline.

Explanation:

The difference between them is the composition of the extracellular matrix that surrounds the fibroblast, that is to say that in loose connective tissue, the function will be of support or filling, and the fibroblast is immersed in an extracellular matrix with a high content of water and proteins. collagen.

On the other hand, in dense connective tissue, the amount of collagen fibers is greater, the protein structure as well, and the interlacing between proteins is more complex, and they may also have the ability to calcify as in the case of bone tissue or cartilage.

Finally, we have the hyaline connective tissue, which is very rich in hyaluronic acid and is found in the joints forming the discs, which are shock absorbers and protectors from bone wear due to friction between surfaces, hyaluronic acid, proteinglycans and glycoproteins are the main protagonists of all connective tissues together with the fibroblast, but even more so in the hyaline connective.

Answer:

splitting water into hydrogen and oxygen

Explanation:

because

The light-dependent reaction

          The light-dependent reaction, as its name implies, occurs inside the thylakoid membrane and necessitates a constant supply of sunshine. The light waves' energy is captured by the chlorophyll and transformed into chemical energy in the form of the molecules ATP and NADPH.

What is Photosynthesis ?

           Plants and other living things employ a process called photosynthesis to transform light energy into chemical energy that can then be released through cellular respiration to power the organism's activities. Despite the fact that various species undertake photosynthesis in different ways, the process always starts when proteins called reaction centres that contain green chlorophyll absorb energy from light. Unlike bacteria, which have these proteins incorporated in the plasma membrane, plants store these proteins in organelles called chloroplasts, which are most prevalent in leaf cells.

         When the cell needs energy, ATP can be taken out and used to fuel processes or stored for use in later ones. Animals use ATP to retain the energy released during meal digestion. Similar to this, plants use ATP molecules to store the energy they obtain from light during photosynthesis.

          In addition to converting ADP to ATP, photosynthetic processes are used by plants to absorb, process, and store solar energy. Animals convert ADP to ATP, which can subsequently be utilised to drive essential development and cell maintenance, using the energy supplied from the breakdown of glucose and other molecules.

           Plants absorb water (H2O) and carbon dioxide (CO2) from the soil and atmosphere during photosynthesis. Water is oxidised, which means it loses electrons, while carbon dioxide is reduced, which means it receives electrons, inside the plant cell. Water is converted into oxygen and carbon dioxide into glucose as a result.

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Answer:

Some changes that can occur in ecosystems are seasons, tide cycles, population sizes, succession, evolution, landscape changes, and climate changes.

Explanation:

hope it helps you sir or ma'm

Answer:

They viewed the Panther with fear and set out on a mission to exterminate it.

Explanation:

The first Spanish conquistador to ever sight a Panther was Alvar Nunez Cabeza de Vaca in 1513. When he saw the panther which he referred to as a lion, he was fearful of the animal. He and other Europeans set out on a mission to exterminate all Panthers. This was also necessary as they had to clear the bushes for them to reside.

In 1821 when Florida officially became a part of the United States, and people had to relocate there, a $5 dollar bounty was placed on every Panther killed. The Panthers relocated farther into the wild. As of 1990, the population of the Panther was just around 50. Panthers have since been named an endangered species.

Answer:

Cells have many structures inside of them called organelles. These organelles are like the organs in a human and they help the cell stay alive. Each organelle has it's own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA.

Explanation:

Answer:

Vacunas

Explanation:

Las vacuna son preparaciones seguras obtenidas mediante numerosos ensayos clínicos, cuyo objetivo es generar inmunidad contra una enfermedad mediante la producción de anticuerpos. Basicamente, existen tres tipos de vacunas: vacunas atenuadas, vacunas de ARN mensajero y vacunas de terapia genética. En primer lugar, las vacunas atenuadas están desarrolladas usando fragmentos del virus que provoca la enfermedad, lo cual se conoce como vacunas atenuadas porque están fabricadas con virus atenuados/inactivados. Por otra parte, en los últimos años, han sido desarrolladas vacunas derivadas de ARN mensajeros (ARNm) las cuales permiten sintetizar una proteína específica del virus (antígeno) y de este modo generar una respuesta inmune que permanecerá ante una posible infección. Finalmente, las vacunas de terapia génica utilizan como vector un virus que no se integra al genoma pero que es altamente estable, como por ejemplo un adenovirus (un virus del resfriado común), el cual permite introducir en las células la información genética del patógeno a fin de generar proteínas virales específicas capaces de desencadenar una respuesta inmune, es decir, generar anticuerpos específicos, contra el virus.

Answer:

Terrestrial planets are Earth-like planets made up of rocks or metals with a hard surface. Terrestrial planets also have a molten heavy-metal core, few moons and topological features such as valleys, volcanoes and craters.

Explanation:

Is that what your talking about?

400x

Is the answer to this question.