Answer: The Earth's continents are in constant motion. On at least three occasions, they have all collided to form one giant continent. If history is a guide, the current continents will coalesce once again to form another supercontinent. And a study in Nature now shows how that could come about.
You can think of continents as giant puzzle pieces shuffling around the Earth. When they drift apart, mighty oceans form. When they come together, oceans disappear. And it's all because continents sit on moving plates of the Earth's crust.
Then, Now And Future
A new model of continental drift predicts that the next supercontinent could form near the North Pole — in another 100 million years or so.
Two of the previous supercontinents, which formed 200 million years ago (Pangaea) and 800 million years ago (Rodinia).
Mitchell, et. al./Nature
The Americas and Asia may fuse together to form a new supercontinent, "Amasia."
Mitchell, et. al./Nature
"Continents on these plates typically move, I would say, at the rate your fingernails grow," says Ross Mitchell, a graduate student at Yale University. That may seem slow, but it adds up over hundreds of millions of years.
Look at an atlas and you can imagine how Africa and South America, for example, once nestled together.
"Rewind the tape and bring all the continents back into their jigsaw arrangement, you have this vast landmass of all the Earth's continental blocks together," Mitchell says.
Last time all the landmass clumped up, it formed a supercontinent called Pangaea. The dinosaurs walked there. But Pangaea wasn't the first.
"There had been three, possibly a debated fourth supercontinent through the billions of years," Mitchell says.
He has been studying that deep history by looking at tiny magnets buried in rock around the world. Those magnets pointed north when they were locked into the rock. Sample those magnets in layers of rock laid down over millions of years, and you can tell the story of how those continents have moved.
And naturally, that led Mitchell to wonder what the next supercontinent will look like.
There have been two leading ideas. One is that the continents will collapse together again at the site of the last supercontinent, centered on Africa. That would squeeze the Atlantic Ocean shut. The other idea is that the Atlantic would keep growing and growing.
Considering the theory of continental drift, is it possible that the continents of the earth could once again become one.
The Earth's continents are constant motion, they will collide to form a giant continent and the current continents will coalesce once again to form another supercontinent.
What Is Continental Drift Theory?Continental drift theory was the revolutionary theory developed by Alfred Wegener (1880-1930), a German meteorologist, climatologist, and geophysicist.
He put forwarded his hypothesis that the continents included in a large enormous landmass or supercontinent about 240 million years ago before breaking and drifting.
This supercontinent was named as Pangaea.
Some major drawbacks of this theory are he did not explain why the drift happened during Mesozoic era, but not in earlier era.
He did not take oceans into account for his hypothesis, proofs are based on generalized assumption, so it is not significant.
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AB
2. How would the Xenatib experiment you designed in Procedure 1.7 be different if you were
testing its effectiveness on humans with pancreatic cancer instead of mice? Explain.
Answer:
cos it works on humans better i guess
Explanation:
What type of boundary causes mid-ocean ridges
divergent boundaries
Help please. I posted a picture of the question and answer choices.
Answer:
The answer is D. Our family usually plants tomatoes, onions, and okra.
The Earth's crust is divided into plates that move over the mantle and interact at
plate boundaries. This modern understanding of movement of the crust is explained
by
the principle of superposition
the theory of plate tectonics
the theory of geologic displacement
the theory of continental drift
Answer:
The theory of plate tectonics
Explanation:
The theory of plate tectonics because it's suggesting that it's about how the plates interact with eachother.
Which statements describe how a machine can help make work easier? Select two options.
It can put out more force than the input force by decreasing the distance through which force is applied.
It can increase the amount of work performed if the output force is in the same direction as the input force.
It can apply a force to an object in a different direction than the force applied to the machine.
It can increase the distance through which a force acts by exerting less force than was used on it.
It can exert a greater force through a greater distance than the force used on the machine.
Answer:
1st option and and 3rd one
Explanation:
Fill in the blank with a word that correctly completes the sentence.
Flatworms have a remarkable ability to generate a whole body from any small piece. This multi-headed worm will split apart and grow into several complete, separate individuals.
Offspring that are genetically identical to the parent are produced by reproduction.
Answer:
Small piece of its body.
asexual reproduction.
Explanation:
Flatworms is also reproduce by multiple fission. The body of flatworms splits into small pieces and each piece becomes a new individual. Asexual reproduction is a type of reproduction in which a new organism is formed from a single parent which is identical to that parent and no variation in size and shape of offspring. examples of asexual reproduction are binary fission, multiple fission, segmentation and budding.
Objects that are further away from one another, have
more gravity?
True
False
Answer:
I think it is false
Explanation:
because when we put 2 magnet 4 cm distance the magnet does not have any gravity to attract each other
If you notice that there is a fire in a science lab, the first thing you should do is _____.
A. tell your teacher
B. pull the fire alarm
C. get the fire extinguisher
D. exit the room immediately
Answer:
I would say D. Exit the room immediately because the fire can spread if u wait to pull the fire alarm and such idk lol.
Explanation:
Just because
What is a homologous structure? Give an example
What is an organelle?
Answer:
Organelles are structures within a cell that perform specific functions like controlling cell growth and producing energy. Some examples are lysosomes, nucleus , mitochondria , and endoplasmic reticulum (ER).
Explanation:
NEED ANSWER QUICKLY!!!!!!!!!!!
1. Which substance made by photosynthesis is used in the process of cellular respiration?
A) oxygen
B) nitrogen
C) carbon dioxide
D) ATP
2. How could you describe the roll of ATP in a cell?
A) absorbs sunlight
B) causes digestion
C) supplies energy
D) causes breathing
Answer:
Number one- Atp also known as glucose
Number two- In Summary: ATP supplies energy
Explanation:
Number two- ATP functions as the energy currency for cells. It allows the cell to store energy briefly and transport it within the cell to support endergonic chemical reactions. The structure of ATP is that of an RNA nucleotide with three phosphates attached.
Food webs diagram the complex relationships of energy flow in an ecosystem containing a variety of producers and consumers. A diagram is provided. Which of the following correctly shows one path that energy would flow through this ecosystem?
A. A Star grass → termite→ wildebeest→ aardvark
B. B Hyena → aardvark → impala → harvester ant
C. C Grasshopper → termite→ warthog → hare
D. D Red oat grass → termite → wildebeest → lion
In food web, Grasshopper → termite→ warthog → hare correctly shows one path that energy would flow through this ecosystem.
What do you mean by food web?A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Another name for food web is consumer-resource system.
Primary consumers, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow. At the top of the system are the apex predators: animals who have no predators other than humans.
Food web is an important conceptual tool for illustrating the feeding relationships among species within a community, revealing species interactions and community structure, and understanding the dynamics of energy transfer in an ecosystem.
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do most mutations generally cause the development of new traits found in organisms?
Answer: Not all mutations lead to evolution.
Explanation: Also, many genetic changes have no impact on the function of a gene or protein and are not helpful or harmful. In addition, the environment in which a population of organisms lives is integral to the selection of traits.
Please mark me brainlest :)
2.
Select the correct answer.
The three domain system recognizes fundamental differences between the two groups of which one of these?
A. Eukaryotes
B. Prokaryotes
Ос.
Protists
Reset
Next
True or False: If an Ecosystem is out of balance then other plants and animals will be affected.
Answer:
True
Explanation:
It becomes a chain reaction
Compare and Contrast: Vaccines versus Antibiotics
.
Answer:
Vaccine- prevents viral infections
Antibiotics- taken after you are exposed to the bacteria
Explanation:
Mutations that create small differences in the DNA sequence , making different versions of the same genes, best account for
Answer:
cancer (a mutated gene)
Mutations that create small differences in the DNA sequence, making different versions of the same genes, best account for oncogene. These different versions of the same genes are called alleles.
What is mutation?A mutation is a change that takes place in the sequence of our DNA as a result of errors made during DNA replication or environmental influences like UV light and cigarette smoke.
Base substitutions, deletions, and insertions are the three different forms of DNA mutations. Depending on the situation or location, the impacts of mutation might be advantageous, detrimental, or neutral.
One or more genes can mutate to create genetic diseases. One such genetic illness brought on by a mutation in one or more genes is cystic fibrosis. Another illness brought on by a change in the genes that control the cell cycle is cancer.
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A variety of species of Galapagos finches evolved from one original species long ago through
the process of
A)
asexual reproduction
B)
ecological succession
natural selection
D)
selective breeding
Answer:
A. Asexual Reproduction
Explanation:
The offspring that arise by asexual reproduction from a single cell or from a multicellular organism inherit the genes of that parent.
Galapagos finches can be called Darwin's finches are derived recently from the common ancestor. A variety of species of Galapagos finches evolved from one original species long ago through the process of natural selection.
What is natural selection?Natural selection is the process of changing and adapting in the environment of a given population.
There are four conditions needed for natural selection:
Reproduction.Heredity.Variation in the organism.Variation in individual characters.A variety of species of Galapagos finches evolved from one original species a long time ago by the process of natural selection.
thus, the correct option is C.
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unlike plant pro-life protest unlike plant-like protists animal-like protists are always
Answer:
Heterotrophs
Explanation:
Answer:
Unlike plant-like protists, animal-like protists are always heterotrophs.
Explanation:
Most plant-like protists are autotrophic, with few being heterotrophic.
How does a water wheel do work (NOT how does water do work on a water wheel)?
Answer:
The falling force of the water pushes the paddles, rotating a wheel.This creates a special channel known as a mill race from the pond to the waterwheel.
Explanation:
A waterwheel is a type of device that takes advantage of flowing or falling water to generate power by using a set of paddles mounted around a wheel.
Answer:
water is water and wheel is wheel do not just think of them like things that dont matter please love water
Explanation:
Which reproductive organ has the greatest number of different functions?
A. Ejaculatory duct
B. Vagina
O C. Vas deferens
D. Ovary
Answer:
Ovary
Explanation:
trust me bro
im playin
buh nah fr doe
Which of the following best explains how subsoil becomes rich in minerals?
How can dissections better prepare your understanding of the world around us?
Should cities located in or near deserts build solar and wind farms? Why or why not? Cite evidence from the text to support your answer.
How does killing whales affect the food chain?
Whales play an important role in stabilizing the aquatic food chain and reproduction of other species.
As more whales are killed the food distribution in the ocean becomes destabilized and causes changes in the food supply of many other kinds of marine life.
Whales are vital to the food chain, stabilising food flow and maintaining a healthy ocean.
As such, the rapidly decreasing whale population will have major effects on the ocean's ecosystem.
Believe it or not, whale poop also serves quite an important purpose to the ecosystem.
What type of bond between water molecules pulls them into this tight ball?
Answer:
hydro
Explanation:
Why can making observations be a very good way to come up with a scientific question?
A. Observations and questions are the same thing.
B. Observations make sure that your question is scientific.
C. You are likely to observe something that makes you curious.
D. You can't actually observe something without thinking of a question first.
Answer: i believe its D
Explanation: hope that helped
Answer:
C. You are likely to observe something that makes you curious.
Explanation:
The first step of the scientific method is to make an observation about something interesting.When someone notices something puzzling that makes that person curious.
Where is potential chemical energy stored?
In a closet
In the bonds between atoms
Between different molecules
Between the protons of an atom
Answer:
In the bonds between atoms
Explanation:
Chemical energy is stored in the bonds that connect atoms with other atoms and molecules with other molecules. Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released.
6. Genetic recombination, production of more offspring than can survive, 4 poin
and struggling with the challenges of the environment are all concepts
associated with
natural selection
mitotic selection
selective breeding
genetic engineering
Answer:6. Genetic recombination, production of more offspring than can survive, 4 poin
and struggling with the challenges of the environment are all concepts
associated with
natural selection
mitotic selection
selective breeding
genetic engineering
Explanation:A) selecting and breeding the organisms for
specific traits
Genetic recombination, production of more offspring than can survive, and struggling with the challenges of the environment are all concepts associated with selective breeding.
What do you mean by selective breeding?Selective breeding entails selecting parents who possess particular traits to mate to produce offspring with more desirable traits. For thousands of years, humans have selectively bred a variety of plants and animals.
The reason for particular reproducing is to foster domesticated animals whose positive characteristics have solid heritable parts and can hence be engendered.
By selecting which typically animal or plant males and females will sexually reproduce and bear children together, selective breeding allows humans to selectively develop particular phenotypic traits.
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The protist kingdom is defined by how these organisms:
reproduce
escape from predators
decompose
get food
Answer:Plz mark Brainliest
It is either reproduce or decompose
Explanation:
I learned about it this year