What causes black holes to form?

Answers

Answer 1
Most black holes form from the remnants of a large star that dies in a supernova explosion. (Smaller stars become dense neutron stars, which are not massive enough to trap light.) ... When the surface reaches the event horizon, time stands still, and the star can collapse no more - it is a frozen collapsing object.

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For a claim about the natural world to be considered scientific, what attributes must it have?
It must be consistent with only a small portion of relevant observations or data.
It must be open to modification if new evidence doesn't completely support it.
It must be based on scientific observations that can be repeated in a controlled setting.
It must be applicable to future events and occurrences.

Answers

Answer: The correct answer is that it must be based on scientific observations that can be repeated in a controlled setting. Explanation: This controlled setting, which replicates the real world encounters is known as scientific experiments. Experiments permit for a smaller scale world where the results can be determined with the manipulation of specific elements in the controlled setting. Experiments assist in the understanding of the natural world.

Answer:

I will send a screenshot of the one a person solves

PLEASE HELP! MAJOR QUESTION FOR ASSIGNMENT! WILL GIVE BRAINLIEST!
Describe the reproductive process of an angiosperm, from pollen production through the formation of a seed.

Answers

Answer:

The angiosperm life cycle consists of a sporophyte phase and a gametophyte phase. The cells of a sporophyte body have a full complement of chromosomes (i.e., the cells are diploid, or 2n); the sporophyte is the typical plant body that one sees when one looks at an angiosperm.

Explanation:

Sheena's B lymphocytes (B cells) produced antibodies to protect her about 3-5 days after she was exposed to a virus. What type of immunity do antibodies provide

Answers

There are two types of immunity: These are acquired immunity and innate immunity.

The type of immunity that these antibodies provide is the acquired immunity.

When an individual's immune system responds to a foreign substance or pathogen, or when a person acquires antibodies from another source, this sort of immunity called the acquired immunity develops. It is a type of immunity developed over time in response to invasion of pathogens.  

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SOMEONE PLEASE HELP ME!!!!!!!

In a phrase, tell me what each scientist did to help develop the cell theory.

Scientists: Hooke, Leeuwenhoek,
Schleiden, Schwann, and Virchow

Answers

hooke- first to visualize a microorganism

leeuwenhoek- first to observe bacteria and protozoa(single celled organisms)

schleiden- said all plants tissues are composed of cells and that every other cell came from 1 single cell

schwann- concluded all tissues are made of cells

virchow- all cells come from preexisting cells

What is the difference between a population and a community?

Multiple choice question.
cross out

A)
A population is made up of all species in an area. A community is made up only of one species.

cross out

B)
A population is made up of only one species. A community is made up of all species in an area.

cross out

C)
A population is made up of all the species and nonliving things in an area. A community is made up of all species in an area.

cross out

D)
The words mean the same thing.

Answers

A because it explains the differences

the codon read using the genetic code to determine the amino acid is found in the

tRNA, mRNA, rRNA or DNA
helpp!!!!!!!!!!!

Answers

Answer:

tRna and mRna

Explanation:

tRna and Mran

Describe how the chemical energy in ATP is converted into electric potential energy

Answers

Answer:

espero ter ajudado boa noite

Explanation:

Descreva como a energia química em ATP é convertida em energia potencial elétrica

Which statement best describes what is occurring in the diagram?

A- DNA is being replicated
B- RNA is being used as a template to make tRNA
C- RNA serves as a template to synthesize new DNA molecules
D- DNA serves as a template to make a strand of

Answers

Answer is D - DNA serves as a template to make a strand of mRNA.

2. part of a plant is removed to grow another plant

Answers

Answer:

Cutting

Explanation:

On average, men have a basal metabolic rate (BMR) of 1.0 kilocalorie per kilogram per hour. Lawrence weighs 198 pounds. Calculate how much energy Lawrence expends for basal metabolism per day.

Answers

The energy Lawrence expends for basal metabolism per day is 2,160 kilocalories per day.

Basal metabolic rate is defined as the amount of energy that is used when an individual is at rest.

This energy is used for life sustaining functions such as:

breathing,

circulation,

nutrient processing and

cell production.

To calculate the Basal Metabolic Rate for Mr Lawrence,

Lawrence weight = 198 pounds

60

(convert pounds to kilogramme)

1 pound = 0.453592kg

198 pounds = x

xkg = 0.453592 × 198

= 89.8 kg

But BMR for average men = 1 kilocalorie per kilogram per hour.

That is, 1 kilocalories = 1 kg per hour

x kilocalories = 89.8 per day

Therefore for a day = 89.8 × 24 ( 24 hours = 1 day)

= 2155.469184

approximately. = 2,160kilocalories per day

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1. What happens to the rubber band when you pulled? a. The rubber band stretches c. Nothing happens to the rubber band. b. The rubber band suddenly cut out. D. all of the above 2. Using this model identify the type of fault. a. Strike-slip fault. b. Normal Fault c. Reveres Fault d. all of the above 3. This is the location on the surface of the Earth directly above the focus. a. Focus b. Fault c. Epicenter d. All of the above 4. It is where the earthquake starts. a. Focus b. Fault c. Epicenter d. All of the above 5. Which of the following is not related to earthquake? A. Ground shaking B. Fault C. After shocks D. Typhoon 6. Which of the following are safer place during an earthquake? A. Inside the house B. Outside in an open area C. Inside the car D. Under a tre Items 7-10 refer to the diagram below. C B GA​

Answers

Answer:

d

Explanation:

what do dna evidence and the fossil record indicate are the ancestors of the living cetaceans, the mammalian group that includes whales, dolphins, and porpoises?

Answers

DNA evidence and the fossil record indicate are the ancestors of the living cetaceans were land-dwelling mammals. DNA evidence allows to trace the evolutionary origin of taxonomic groups.

DNA evidence refers to the linear order of nucleotides, which can be used to trace the evolutionary origin of a particular taxonomic group.

When the linear order of DNA nucleotides is conserved, it is known as sequence homology.

Fossils are preserved remains of organisms that once lived on the Earth, which can also be used as evidence to trace the evolutionary origin of a given group.

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what is the answer to 2x?=2

Answers

Answer:

if you're trying to find x then the answer would be x=1 b/c 2 times 1 and 2=2

Explanation:

since nothing times 2 equals 2 it would be one

Process that requires oxygen

Answers

Answer:

Cellular respiration

Explanation:

What is the relationship between gene expression and human reproduction and development?
plss

Answers

In the same way, cells during development also express specific sets of genes. These patterns of gene expression cause cells to communicate with neighboring cells, resulting in coordinated development into a multicellular organism.

(I'll give Brainliest to whoever replies the faster)

How far apart are Y and L? Give your answer in map units. (Hint: Add the numbers of the two recombinant types, divide by the total number of offspring, and multiply by 100.)

Answers

Do you have a picture of the map?

which codon on the mrna strand codes for the amino acid carried by the aminoacyl-trna represented in the figure?

Answers

Answer:5’UUC-3

Explanation:

What is a specific example of competitive advantage exhibited by Darwin’s finches?(1 point)

Birds have one of two forms of the HMGA2 gene.

Female finches mated with males that had similar-sized beak

All of the finches evolved from one ancestral species and adapted to their specific niche.

Medium ground finches with small beaks survived multiple droughts.

Answers

Answer:

Explanation:

All of the finches evolved from one ancestral species and adapted to their specific niche. of them evolved from one ancestral species, which colonized the islands only a few million years ago.

Darwin's finches, which was residing in the Galapagos archipelago and Cocos island, constitute an iconic model for studies of speciation and adaptive evolution. All of the finches evolved from one ancestral species and adapted to their specific niche.

What are the characteristics of Darwin's finches?

The evolutionary history of Darwin's finches is identified by a gene that explains variation in beak shape within and among species.

The major factor influencing the survival of the medium ground finches is weather and the availability of food.

As all of the finches evolved from a single ancestral species and adapted to their specific niche, it is a specific example of competitive advantage exhibited by Darwin’s finches.

Thus, the correct option is C.

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The network of connective tissue fibers which pass through the tissues of the body and allow for the efficient movement of immune system cells is the

Answers

Answer:

reticuloendothelial system

Explanation:

The reticuloendothelial system (RES) is a heterogeneous population of phagocytic cells in systemically fixed tissues that play an important role in the clearance of particles and soluble substances in the circulation and tissues, and forms part of the immune system.

What virus most relates (in looks) to this picture? Will give brainliest :)

Answers

Answer:

it looks like

Explanation:

astronomy is the study of the ___ beyond earth.

astronomers are scientists who study:
. _____
.___ systems.
. ______
. galaxies.



Fill in all the blanks plssss.s

Answers

1 universe 2 stars 3 solar 3 planets

HELP i need this question fast pls anyone i will mark brainliest

Answers

Answer:

hi! the answer you already have marked is correct.

Explanation:

D. Weathering and erosion by water.

have a great day!

hope this helped!

feel free to mark as brainliest! ;)

Answer:

D. Weathering and erosion by water

Explanation:

The river water carries sediment to different areas and lays them there. However, after breaking down the river sediment it opens a bigger area in which water may flow, thus allowing the river to become wider

Which type of cytoskeletal element is characterized as a hollow, rigid cylindrical tube with walls composed of tubulin subunits

Answers

Microtubule is the ans

what birds is a likely biological explanation for The
Mothman?

Answers

Answer:

owl is a like biological explanation for mothman......

Can someone help me please?!

A family released their pet fish family into a local pond. The fish had no known local population. The impact of the fish on
the ecosystem is not yet known.
Which term would best define the fish added to the pond?
O invasive species
O introduced species
O native species
O symbiotic species

Answers

The term that would best define the fish added to the pond is INTRODUCED species. These species may be harmful to native species.

Introduced species are exotic species which has arrived there by human activity, which may be harmful to native species.

Introduced species may even be harmful to the entire ecosystem because they can break the delicate equilibrium of the ecosystem.

Introduced species may compete with native species for limited resources (e.g., water resources, foods, habitat, etc).

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Answer:

To sum it up, it's A "Introduced species"

Explanation:

It's correct. Have a blessed day <3

What is the surface temperature of Barnard's Star in Kelvins? (Astronomy)

Answers

Answer:

the answer should be 3,100 kelvin.

Explanation:

its surface has very hot flares causing it to be about 3,000 to 8,000 kelvins. this would mean its surface temperature should be around 3,100.

A classmate states that both energy and matter can be created during photosynthesis and cellular respiration. Is this true? Explain

Answers

No, the chemical equations for both processes are evidence that matter and energy or neither created nor destroyed

Energy and matter are also produced during photosynthesis.Chemical energy in the form of glucose and matter in the form of oxygen gas are produced during photosynthesis.Since these are the results of the reaction, they are regarded as process outputs.

Can both energy and matter be created during photosynthesis?

Some cells employ a process called photosynthesis to convert light energy into food.Because it enables plants to produce the food required for the rest of the ecosystem, photosynthesis is crucial.Producing organisms, or those that grow their own sustenance, are plants.The foundation of the ecosystem is formed by producers, who transform solar energy into chemical energy in the form of food for themselves and other ecosystem inhabitants.Although many ecosystems are dominated by plants, other organisms are also capable of photosynthesis.Some bacteria and algae are capable of photosynthesizing, and these organisms are the producers in their ecosystem. A biological process called photosynthesis consumes both matter and energy.The world's physical components are made of matter.The capacity to perform work is energy.By use of various mechanisms, matter and energy can be switched for one another.On the other hand, neither matter nor energy can be generated nor destroyed.The first law of thermodynamics is that they constantly evolve into new forms.All processes in the universe operate in this manner.Energy can be transformed into a variety of forms.Several instances include:Chemical drivekinetic energythe potential energy of gravityelastic force The substance and energy persist even after an organism dies.Instead, they are changed into other forms.For instance, both matter and energy are components of plants.Fungi and bacteria in the soil aid in the breakdown of a plant's internal substance into its constituent parts when it dies.These can be used by newly sprouting plants by being recycled into the soil.As a result, neither the energy nor the substance is wasted; rather, they are transformed into new forms.

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1. What is hemoglobin?

Answers

Answer: "Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs."

Answer:

Hemoglobin is the protein in your red blood cells that carries oxygen to your body's organs and tissues and transport carbon dioxide from your organs and tissues back to your lungs. This small little protein in your blood does such a big task.

hope this helps :0

21. Explain How did Earth's environments change
from the Neogene to the Quaternary Period?

Answers

Answer:

Climate change and the developments it spurs carry the narrative of the Quaternary, the most recent 2.6 million years of Earth's history. Glaciers advance from the Poles and then retreat carving and molding the land with each pulse. Sea levels fall and rise with each period of freezing and thawing.

Explanation:

Match each part of the lymph node with the correct label.

Answers

Answer:

Your numbers are

1 Afferent Lymphatic Vessels

2 Lymphatic Nodule

3 Germinal Center

4 Efferent Lymphatic Vessels

Explanation: are correct

1 Afferent Lymphatic Vessels, 2 Lymphatic Nodules, 3 Germinal Centers, 4 Efferent Lymphatic Vessels.

What is a lymph node?

No lymph nodes exist in the central nervous system. The lymph nodes are more likely to gather in three locations on each side of the body.

The inguinal nodes in the groin, axillary nodes in the armpit, and cervical nodes in the neck are where these sites are found.

The typical lymph node is enclosed by a connective tissue capsule, which divides it into lymph nodules. The lymph nodules, which are dense aggregations of lymphocytes and macrophages, are divided by lymph sinuses.

Therefore, there are several locations throughout the node's perimeter where afferent lymphatics, which carry lymph there from the periphery and enter the node on its convex side, may be found.

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Hello please asap pleaseeeeee Please Help, And Include Explanation. I will Give Brainliest To Best Answer 2 + 2 = ? plz help me A ant runs 45 inches in 15 seconds, a snail crawls 12 inches in 3 seconds. Who is faster? I need help please and thank you :) What is the BEST revision you can make to create a strong argument? Simplify. (5b23b+2)+(2b4) A.5b2+5b+6 B.5b25b6 C.5b2b2 D.6b42 divide,write in simplest form 6 1/2 divided by 3/4 ) Are 9:6 and 18: 12 equivalent? What type of angle of this? Air currents ocean currents and climate escape room level 3 Pierson's Pet Palace has an 85 gallon fish tank. When it needs to be cleaned, it can be drained at a rate of 4 gallons per minute. Write an equation. help pls In a chemical change energy can be ___?A. Created but not destroyedB. Either created or destroyed C. Destroyed but not created D. Neither created nor destroyed i think it is important to know about the brain injuries Help me figure out what French conjugation 3. How did the Court's ruling in Adarand Constructors, Inc. v. Pea impact minority businessowners Scale: 2inches = 1 ft1.)Jenna's father is going to use the blueprint above to make a playhouse for her. The length of the entire first floor is 12 inches. What is the actual length?2.)The width of the entire first floor it is 8 inches. What is the actual width?3.)What scale factor did Jenna's father use to go from the drawing to the actual house?4.)What is the perimeter of the first that floor Jenna's that father built?5.) What is the area of the first floor that Jenna's that father built? Major cities all over the world are changing color. The tall gray buildings that make up the landscape of urban environments are becoming greener. They aren't getting a fresh coat of paint. Instead, their roofs are being covered in grass and small shrubbery. Many rooftops are beginning to look like nature parks. This change isn't just for fun. It is an attempt to add plants that can clean city air, absorb waste water, and generally add beauty to the city environment.Green roofs started in Europe and are now gaining a strong foothold in the United States. They are a way to add a little nature to the city environment. People plant vegetable gardens, flowers, and decorative grasses on their rooftops. One green roof in New York City is built on top of a processing and distribution facility. It is the largest green roof in the country. It has survived snow and rain, given employees a beautiful place for a lunch break, and helped clean the city air.It is more expensive to build a green roof than it is to lay asphalt or shingles. The basic green roof requires a frame and a waterproof membrane. It also requires gravel for drainage. Special material needs to be laid to retain moisture. Of course, soil for planting and a barrier that prevents roots from penetrating the building are also necessary materials for a green roof. Despite the extra cost, the trend is growing.The city of Chicago now has more green roofs than any other U.S. city. There are 7 million square feet of green roofs planted across the city. Toronto, Canada, is the first city in the western hemisphere to mandate green roofs on all new tall buildings. Green roofs are beneficial to the environment and the cities that build them. A recent study in Toronto suggested that if 75 percent of the flat roofs were greened, the city could save $37 million a year on storm water management and energy bills. If this is true, we may begin to see more and more green added to cities around the world.What evidence does the author use to support the idea that green roofs are beneficial despite their cost?A. It is more expensive to build a green roof than it is to lay asphalt or shingles on a roof.B. Green roofs started in Europe and are now gaining a strong foothold in the United States.C. The city could save $37 million a year on storm water management and energy bills.D. Toronto, Canada, is the first city in the western hemisphere to mandate green roofs. 100-80 divided by 4+(6-3) using pemdas Look at the model. Name three equivalent fractions for the part that is shaded Which graph represents f(x) = -1/4 x^6