Answer:
Black holes trap all light.
Explanation:
This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe directly. Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace.
Answer:
1. How do emission and reflection nebulae differ?
interactions with light
2. Where could scientists look to observe a black hole?
the center of the Milky Way
3. Which description best summarizes the steps that take place during black hole formation, in the correct order?
A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.
4. Select the correct answer from the list.
To form a nebula, gravity pulls matter together or causes an explosion.
5. Which of these characteristics of a star make it most likely to become a black hole? Select the two correct answers
It is dying.
Its mass is greater than 20 times the mass of the sun.
6. Which statement best describes the galaxies closest to the Milky Way?
These galaxies include irregular, spiral, and elliptical types.
7. Select the correct answer from the list.
Astronomers think that most galaxies are centered by a black hole which exerts gravitational pull that binds the galaxy together.
8. What is the main challenge astronomers face when trying to directly detect black holes?
Black holes trap all light.
Explanation: I got 100%
Which is an example of genetic diversity? PLS HELP temperate rain forest and a tropical rain forest bees, jack rabbits, diamondback rattlesnakes bacteria, garter snakes, tigers variations in a flock of starlings
Answer:
temperate rain forest and a tropical rain forest bees.
Explanation:
The temperate rain forest and a tropical rain forest bees is the example of genetic diversity because the same organisms has different features which allows them to live in different climatic conditions due to their variation in genetics. The environment of temperate rain forest is different from tropical rain forest so the bees specie that live in both environment are different from one another in their genetic makeup and which is an example of genetic diversity.
In a typical forest, how much natural waste is made in one year?
20cm
40cm
60cm
How are humans , technology , and the environment interrelated
Answer:
Humans , technology , and environment are always interrelated.
Explanation:
To procure nutrition, water, electricity, medications, construction materials, and several other objects, humans must communicate with the environment. Development of science and technology had already allowed us to take advantage of the eco system, but they have also resulted in massive environmental damage and exploits.
please help i am giving away brainiliest for the best answer
Which of these words describes diseases that are spread from one organism to another?
A. genetic
B. inherited
C. infectious
D. noninfectious
No dam links
Answer:
C. infectious
Explanation:
Please help fast!!!!5. Challenge: A food web is a more complicated
diagram that shows the feeding relationships of all
the organisms in the ecosystem. As with a food
chain, an arrow pointing from species A to
species B indicates species B gets its energy
from species A.
Nassau
grouper
Yellowtail
snapper
Hawksbill
sea turtle
Long-spined
sea urchin
In the diagram at right, create a food web by
drawing arrows ( - ) to show which organisms
obtain energy from others. Hand draw or click on
the image and select ED
Queen
angelfish
Stoplight
parrottish
Sponges
Star
coral
Staghorn
coral
Plankton
Symbiotic algae
Algae
Answer: there is no diagram and if you could explain that would be helpful
Explanation: but I can do some yellow tail snapper(a) go’s to a Nassau grouper(b). long spine sea urchin(a) goes to hawks bill seaturtle(b)
Which type of wetland includes a mixture of salt water and fresh water?
bogs
swamps
inland marshes
coastal wetlands
Answer:
Confirming
Explanation:
SOMEONE HELP ME PLSSSS IT'S AN EMERGENCY :(((
Answer:
I belive the answer is C
Explanation:
Give an example of how biotechnology might be used to cure disease.
Answer:
Biotechnologies may be used to study the genetic material of viruses and bacteria to determine whether a disease is caused by particular disease-producing agents. Its techniques are also used to understand how genetic factors contribute to human disease.
Explanation:
Answer:
These products help treat and prevent diseases. From the Ebola vaccine to mapping human DNA to agricultural impacts, medial biotechnology is making huge advancements and helping millions of people. Some of the most recent uses of biological tech is work in genetic testing, drug treatments, and artificial tissue growth.
Explanation:
Recall that the normal range for the hematocrit for a female is 37 - 47%, and the normal range for the hemoglobin level for a female is 12 - 16 g/100 ml. Describe hemoglobin and hematocrit values for the female with iron-deficiency anemia. Recall that the normal range for the hematocrit for a female is 37 - 47%, and the normal range for the hemoglobin level for a female is 12 - 16 g/100 ml. Describe hemoglobin and hematocrit values for the female with iron-deficiency anemia. They were both below normal. The hemoglobin was normal, and the hematocrit was below normal. They were both normal. The hemoglobin was below normal, and the hematocrit was normal.
Answer:
The hemoglobin was below normal, and the hematocrit was normal.
Explanation:
Hemoglobin is an essential protein in the bloodstream, as it is primarily responsible for the transport of oxygen throughout the body. It is also responsible for the red coloration of the blood, as it is present in the red blood cells. The hematocrit, in turn, is a laboratory parameter to determine the amount of red blood cells in the blood and also to determine the total blood volume.
Although the results presented by the hematocrit are important in determining whether a person has anemia, women with normal hematocrit values may be anemic, primarily because the hematocrit results may be associated with the amount of water in the blood. What is essential to determine if a woman is, in fact, with anemia, due to iron deficiency, is the hemoglobin values that are below normal.
which type of muscle do you control voluntarily
Answer:
Skeletal
Explanation:
dna replication
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ttggtctgggt
Answer: dna replication happens in interphase before the mitosis
Explanation: During interphase the cell’s DNA inside the nucleus replicates forming two strands of DNA or chromosomes. In the interphase the DNA replicates in the S phase. Don’t confuse with G1 since in G1, which comes before S phase, replicates the cellular contents needed for this process
Please helppppppp!!!!
A behavioral or physical adaptation is something ___
helps a species survive
makes a species prettier to look at
makes a species become extinct
prevents a species from surviving
Answer:
Explanation:
The answer is
helps a species survive
Answer:
helps a species survive
Explanation:
is the transforming factor made of proteins?
Answer: Understand about transformation as part of this. ... Is protein the transforming factor? protein-destroying enzymes---made the strains grow so concluded that protein doesn't transform because the bacterial colonies were still transformed. He concluded that protein could not be the transforming factor.
Explanation:
How is glucose conserved during cellular respiration?
PLEASE HELP WITH MY BIOLOGY
Im a well developed paragraph, give a concrete examples that illustrate why the United States should regulate trade.
name two disaccharides which are reducing sugar
Answer:
lactose and maltose
Explanation:
only sucrose is a non reducing sugar
Answer:
Two reducing disaccharides sugar : Lactose and maltose.
Why do we exhale more carbon dioxide than we inhale?
Answer:
When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat. The carbon dioxide is dissolved in the blood, carried to the lungs by the circulation, and breathed out.
Answer:
because our bodies take in O and put out CO2
Explanation:
O is Oxygen
and CO2 is Carbon dioxide
Why are the carbonate ion level in the water decreasing?
Answer:
Carbon dioxide reacts with seawater to form carbonic acid, which releases hydrogen ions, reducing pH.The additional hydrogen ions released by carbonic acid bind to carbonate (CO32-) to form bicarbonate (HCO3–), decreasing the amount of carbonate in the water.
What mechanisms of evolution could be involved in the evolution of wolves and dogs? *
Natural Selection and Genetic Drift
Diffusion and Osmosis
Photosynthesis and Cellular Respiration
Natural Selection and Genetic Drift
evolution refers to the change in the characteristics of a species over several generations and relies on the process of natural selection.
there are four types of mechanism of evolution:
natural selectiongenetic driftgene flowmutationthe mechanism of evolution could involved in the evolution of wolves and dogs are:
natural selection and genetic drift
natural selection favored wolves that were bold and friendly. bold and aggressive wolves would be killed and hence unable to breed. this allowed bold and friendly dogs to breed, which was key to eventual evolution into dogs.
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A(n)\ is a system composed of living organisms and their interaction with the surrounding environment, where the main focus is the interaction and relationship between species .
1.habitat
2.biome
3.environemnt
4.ecosystem
Answer:
The correct answer is 4.ecosystem.
Explanation:
An ecosystem is a system, that is, a set of elements that interact with each other, in which such elements are: physical environment, living beings and their interactions (predator-prey, parasite-host, competition, symbiosis, pollination, distribution of seeds , etc.) The interrelation between living beings (competition, parasitism, etc.) occurs through cycles of matter and energy flows on which the functioning of the entire ecosystem depends.
Please help me
Which means a change in position?
A. force
B. speed
C. velocity
D. motion
Answer:
D. motion
Explanation:
Force is something that acts on an objects (e.g gravity)
Speed is how fast something moves
Velocity is sort of like speed and is the rate of change of an objects position
What cell function can fail resulting in cancer development?
Answer:
cell division
Explanation:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Hope this helped!!!
Which is of the following is necessary for natural selection? 1. There must be a shortage of food 2. There must be a change in the environment, causing individuals to change 3. There must be some genetic differences among the individuals of a species 4. all of the above
Answer:
It's 3!
Explanation:
There must be genetic differences so the best fitted organisms will survive. If they were all the same then no one would be best fitted and Natural Selection wouldn't be able to occur
It's not 1 because a food shortage isn't required, there's always competition for food sources
It's not 2 because there doesn't need to be a change in the environment for natural selection, just for evolution.
And it can't be 4 if 1 and 2 are wrong!
Hope this helped!
in pea plants, purple are dominant to white.
complete the chart showing the genotypes and phenotypes possible.
someone help me i’m kinda lost on how i do this
Answer:
PP (genotype) - Purple (Phenotype)
Pp (Genotype - Purple (Phenotype)
pp (Genotype) - White (Phenotype)
Explanation:
The genotype allele combinations, in order to for purple to be dominant there are three possible genotypes
*Capital P represents a purple dominant allele
*Lowercase p represents a white recessive allele
(Alleles are the variants of a certain gene, ex: brown eyes, green eyes, etc. )
A Dominant always overpowers the recessive, the only way for a recessive to show would be to have two recessive alleles from both parents
ex: Green eyes recessive to Brown
B - Brown bb = green eyes (from dad)
b - green bb = green eyes (from mom)
this means that their child would have green eyes because there is no brown present
So for your pea plants to be purple
Pp = Purple pp = white
PP = Purple (yes there can be white recessive present, it just might not appear as a plant because of the percent of purple)
The colors or observations we see as the plant are the phenotypes
so the colors I have listed would be the phenotypes
Don't get alleles and phenotypes confused, alleles are the various forms of a gene, and phenotypes are what we see when the gene is brought through.
(Will give brainliest if correct and no links) Based on the image in figure 2, would the creation of one type of kidney cell be sufficient in forming a functioning kidney? Explain why?
Answer:
Yes.
Explanation:
The creation of one type of kidney cell will be sufficient in forming a functioning kidney because one type of cells allow the kidney to perform its one function i.e. filtering of blood. Epithelial stem cells are the cells that is responsible for the function of a kidney. The kidneys have only epithelial stem cells which performs only one function which removing water material, excess salts and water from the body. so we can say that one type of kidney cell is sufficient for the functioning of kidney.
Of the 3 phases of water (solid, liquid, and gas), which
has the greatest density due to the positions of the
water molecules?
a) liquid
b) solid
c) gas
Answer:
solid
Explanation:
Matter in solid state have the highest density, with the molecules tightly packed together.
Answer:
Water has a higher density in the liquid state than the solid, so ice cubes float.
plz mark me as brainliest.
Stars ----- Planets
Alike and Different
Answer:
Explanation:
Same
Most stars are round. Planets are too.Most stars are large distances from each other. So are planets (not as large though)Most stars have colors associated with them. So do planets.Different
Stars are many magnitudes of temperature warmer than planets.Stars are mostly gaseous. Planets are solid.Stars are made of fundamental materials. Most planets have many elements on their surface and atmosphere if they have an atmosphere.The star's diameter is many times larger than the planets.Generally speaking, the planet's density is between 1.5 to 5 times more than the stars.What happens to the heat and moisture from the ocean?
a.) They rise into the atmosphere
b.) They sink into the warm deep current
c.) They become precipitation
d.) They move parallel to the hurricane
NEED ASAP!!
Answer:
The answer is A
Explanation:
When water molecules are heated, they exchange freely with the air in a process called evaporation. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds.