Describing the Death of Stars Which statements describe the death of stars? Check all that apply. A star's final stages of life depend on its mass Stars die when they run out of fuel When a star starts to die, its core expands. The outer portion of the star contracts. All stars become black holes when they die Intro
Answers
Answer:
A. A star’s final stages of life depend on its mass.
B. Stars die when they run out of fuel.
Explanation:
A star's life cycle is determined by its mass. ... Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. ... It is now a main sequence star and will remain in this stage, shining for millions to ... When the hydrogen supply in the core begins to run out, and the star is no longer supported.
Related Questions
what is autotroph class 7
answer in 5 sentences
pls I need answer ASAP
Whoever answers will be marked brainliest
Answers
In biology, autotrophs are organisms that can produce their own food using inorganic substances, such as sunlight and carbon dioxide.
How do we explain?Autotrophs are also known as primary producers because they form the base of the food chain by converting energy from the environment into organic compounds.
The topic of autotrophs is typically covered in the study of plant biology in the context of a class 7 curriculum.
The most prevalent kind of autotrophs are plants. They do this through a process known as photosynthesis, which turns carbon dioxide, water, and sunlight into glucose (a sugar) and oxygen.
Chloroplasts, specialized organelles found in plant cells, are where this process occurs.
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How many germ surfaces do people on average touch in one minute
Answers
Answer:
Infectious particles have been detected on both surfaces for up to 72 hours. Because virus numbers can't increase on surfaces, every hour that passes between the virus landing on a surface and you touching it decreases the chance of you getting sick.
Explanation:
hope it is helpful for you Thank youWhat happened to us consumption of natural gas
Answers
In recent years, the United States has experienced an increase in its consumption of natural gas.
Factors contributing to this rise include the abundance of domestic natural gas resources, advancements in extraction techniques such as hydraulic fracturing (fracking), and the transition from coal to natural gas in power generation. Natural gas is utilized for a variety of purposes, including residential and commercial heating, electricity generation, industrial processes, and as a feedstock in the petrochemical industry.
The cleaner-burning nature of natural gas compared to coal has also played a role in its increased use as the country aims to reduce greenhouse gas emissions and transition towards cleaner energy sources.
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another word for prokaryote is what
Answers
Another word for prokaryote is : being, procaryote.
Another name for prokaryote is: Archaea and Bacteria .
Plz help me well mark brainliest if you are correct!
Answers
Answer:
C
Explanation:
Metamorphosis is the action of moths and butterflies changing into a different form.
By the way, can you follow me on Brainly?
Thanks!
Eukaryotes are found in ______ and ________.
Answers
Answer:
plants and animals
Explanation:
on edge
i have the flu and want to go out for birthday dinner with some friends and my friend won’t take no for an answer what is the decision i should make?
Answers
Answer:
Well if you want to go, they want you to go then obviosly go.
Answer:
How long will it be ? will it be far? and is it today
You should get a gift then go to the party with face covering try ur best not to get too close to anyone but dont stay at the party for too long
Explanation:
The endosymbiotic theory proposes that eukaryotic cells arose from living communities formed by the merging of prokaryotic organisms and their hosts.
Which of the following is the best evidence to support the endosymbiotic theory?
Pilihan jawaban
Mitochondria and chloroplasts contain DNA similar to bacterial DNA
Both prokaryotic and eukaryotic organisms require oxygen in order to use energy
Bacteria, mitochondria, and chloroplasts all divide by mitosis, while the cells containing them divide by binary fission
Bacteria and mitochondria contain many features that are similar to each other but different from those of chloroplasts
Answers
Mitochondria and chloroplasts contain DNA similar to bacterial DNA is the best evidence to support the endosymbiotic theory.
According to the endosymbiotic theory, eukaryotic cell organelles like mitochondria and plastids originated from free-living prokaryotes. According to the information at hand, Margulis' theory that the eukaryotic cell evolved first was supported by mitochondrial endosymbiosis.
Endosymbiosis is a type of symbiosis in which the symbiont resides inside the body of its host; this symbiont is referred to as an endosymbiont in this situation.
Because earlier researchers lacked the technology to perform a really fair test of the endosymbiotic hypothesis, there was no conclusive evidence in support of the concept.
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True or False: Larger pigments will travel a greater distance on filter paper than smaller pigments.
Answers
Answer:
true true true true
true true
Answer:
I think the answer is true
Explanation:
A pigment that is the most soluble will travel the greatest distance and a pigment that is less soluble will move a shorter distance.
For BRAINLIST
A squid is shown in the diagram.
Which structure is labeled X?
A mantle
B foot
C radula
D gill
Answers
Answer:
mantle i believe the answer should be mantle
Answer:
Mantle~
Explanation:
~~
Describe how scientists can use comparative anatomy to explain evolution from a common ancestor.
Answers
Such homologies and analogies exist between different body parts. In support of evolution, both offer evidence. As they were passed from one common ancestor, similarities are those found in genera that are alike.
Who is the so-called ancestor?An ancestor, often referred to as a forerunner, fore-elder, or forebear, is the father of an antecedent or (recursively) the mother of the antecedent. Any individual from whom one can be related is considered an ancestor.
How can I know who my ancestors were?You can trace your ancestry using historical and official data. Create your family tree using the free resources listed above. An assortment of genealogy materials are available from the National Libraries and Information Administration.
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What is A Brain? Write its parts name. and explain .
Answers
Answer and Explanation:
The brain is composed of three main structures, the cerebrum, cerebellum, and brain stem. The brain sends chemical and electrical signals throughout the body to regulate different biological functions and sense environmental changes. The brain communicates with the majority of the body through the spinal cord.
PLZ HELP ME
1. The positively charged particle in an atom is the
a. neutron. c. proton.
b. ion. d. electron.
2. Two or more different atoms are combined in
definite proportions in any
a. symbol. c. element.
b. isotope. d. compound.
3. A covalent bond is formed by the
a. transfer of electrons. c. gaining of electrons.
b. sharing of electrons. d. losing of electrons.
4. When you shake sugar and sand together in a test
tube, you cause them to form a
a. compound. c. solution.
b. mixture. d. suspension.
5. A compound that produces hydrogen ions in
solution is a(an)
a. salt. c. base.
b. acid. d. polymer.
6. In polymerization, complex molecules are formed
by the joining together of
a. macromolecules. c. polymers.
b. carbohydrates. d. monomers.
8. Proteins are polymers formed from
a. lipids.
b. carbohydrates.
c. amino acids.
d. nucleic acids.
9. An enzyme speeds up a reaction by
a. lowering the activation energy.
b. raising the activation energy.
c. releasing energy.
d. absorbing energy.
10. In a chemical reaction, a reactant binds to an
enzyme at a region known as the
a. catalyst.
b. product.
c. substrate.
d. active site.
Answers
Answer:
I wont be able to answer all of them but: 1. C
2. Compound
Explanation:
A positive charge is called a proton, no charge is a neutron and a negative charge is a electron
When atoms are combined they are called a compound.
Hopes this helps you a bit.
The human stomach needs to maintain a pH level between 1 and 2 in order to properly digest food.
What is true regarding the environment of the human stomach?
Choose 1 answer:
(Choice A)
A
It is acidic.
(Choice B)
B
It is basic.
(Choice C)
C
It is neutral.
(Choice D)
D
It can switch between being basic and acidic.
Answers
I will go with c I think that it
When did the archean era begin
Answers
Answer:
about 4 billion years ago
During the beginning of the Archean Eon, about 4 billion years ago, as the frequency of meteorite impacts slowed, the Earth cooled, clouds formed, and the crust began to harden from the molten globe. The Earth was still a one-plate planet before the inception of plate tectonics.
what is the difference between plant cell nd animal cell
Answers
A plant cell contains a cell wall and chloroplasts, while animals cells do not have these cellular structures.
Chloroplasts are organelles required to produce energy in the form of ATP and thus synthesize simple carbohydrates (e.g., glucose) by the process of photosynthesis.Cell walls are cellular structures that help to support and shape plant cells.Moreover, plant cells generally contain big vacuoles, whereas animal cells generally exhibit small vacuoles.In conclusion, a plant cell contains a cell wall and chloroplasts, while animals cells do not have these cellular structures.
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8 Sediment samples A through D below have the same volume and packing, but contain different percentages
of various particle sizes.
Sample A: 75% clay and 25% silt
Sample B: 25% clay and 75% sand
Sample C: 50% pebbles and 50% sand
Sample D: 50% pebbles and 50% cobbles
Which sample most likely has the greatest permeability?
(1) A (2) B (3) C (4) D
Answers
When sedimenting samples A through D below have the same volume and packing, but contain different percentages the most likely sample with greatest permeability is Sample D: 50% pebbles and 50% cobbles.
What exactly is sediment sampling?Sediment measurement entails measuring the water-sediment mixture to ascertain the mean suspended sediment concentration, particle size distribution, specific gravity, temperature, and other physical and chemical characteristics of the transported solids.Sediment sampling is the process of removing marine, brackish, or freshwater sediments from the seafloor using either professional divers or a grab device, such as the PONAR Grab, so that they can be examined in a licensed laboratory. Grain size, moisture, and pH are typically evaluated, along with metals, PAHs, and PCBs.For more information on sediment sampling kindly visit to
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ENZYME CATALASE LAB (directions to lab)
1. State the problem
2. Catherinformation
2. Forma lyhen
4. Experiment
Independent Variable
What you call
Part Norma Ename Cate
Volume of a Produced (ml.)
wal
TV
WE
6. Part II C
Volume of Os Produced (L.)
Time Trat
TW
AN
0
0
3
-3
LO
LO
1.3
1.5
to
20
25
25
30
3.0
33
4.0
4.0
4-5
4.5
5.0
5.
7.) chok your data using this lind paste in the box
mal Eray Catil Retation Rate
"Hendaye Catalin Race
Answers
Answer:
ENZYME CATALASE LAB (directions to lab)
1. State the problem
2. Catherinformation
2. Forma lyhen
4. Experiment
Independent Variable
What you call
Part Norma Ename Cate
Volume of a Produced (ml.)
wal
TV
WE
6. Part II C
Volume of Os Produced (L.)
Time Trat
TW
AN
0
0
3
-3
LO
LO
1.3
1.5
to
20
25
25
30
3.0
33
4.0
4.0
4-5
4.5
5.0
5.
7.) chok your data using this lind paste in the box
mal Eray Catil Retation Rate
"Hendaye Catalin Race
Which is a difference between a compound light microscope and a transmission electron microscope?
The compound light microscope can only view specimens in black and white, while the transmission electron microscope has color.
The compound light microscope can view living things, but the transmission electron cannot.
The compound light microscope examines the surface of a cell, and the transmission electron microscope examines internal parts of the cell.
The transmission electron microscope is used for dissections, while the compound light microscope is not.
Answers
Answer:
The compound light microscope can view living things, but the transmission electron cannot.
Explanation:
Electron microscopy requires samples to be frozen and therefore dead
Answer:
B
Explanation:
I just took the test an got it correct hope this helps :)
Both men and women conceived during the widespread famine of the Dutch Hunger Winter were more likely to be obese by age 5050 and more likely to die from stroke or cardiovascular disease. They also experienced more cognitive decline later in life. Fifteen genetic loci associated with growth and metabolic disease were compared between siblings prenatally exposed to the famine and those siblings who were not prenatally exposed.
1. What evidence suggests that these are epigenetic effects?
a. missense mutations within genes encoding histone proteins
b. single nucleotide polymorphisms within loci involved in growth and metabolic disease
c. transposon insertion into loci involved in growth and metabolic disease
d. changes in the methylation patterns of loci involved in growth and metabolic disease
2. Which additional pieces of evidence would help to demonstrate that these effects are due to epigenetic changes?
a. changes in the post-translational modification of metabolic enzymes
b. differences in the expression of metabolic genes
c. mutations in the DNA regions associated with cardiovascular health
d. changes in histone acetylation patterns
Answers
Answer:
1. d. changes in the methylation patterns of loci involved in growth and metabolic disease
2. b. differences in the expression of metabolic genes
d. changes in histone acetylation patterns
Explanation:
Epigenetics refers to the study of heritable changes in gene expression which are not dependent on DNA sequence. Epigenetic mechanisms involve DNA methylation, histone modifications (acetylation, methylation, phosphorylation, etc) and regulatory non-coding RNA (ncRNA) pathways. These epigenetic mechanisms work together and mutually reinforce each other in order to modulate gene expression (either by activating or suppressing gene expression). In consequence, transcriptome data (e.g., genes differentially expressed in particular tissues/cells or stages of development) is an important piece of evidence indicating the existence of epigenetic modulation.
The evidence that suggests that these are epigenetic effects is that changes in the methylation patterns of loci are involved in the growth and metabolic diseases. So, the correct option is D.
What do you mean by metabolic diseases?Metabolic diseases are diseases that are caused due to inefficient metabolic processes. Some of them are Krabbe disease, maple syrup urine diseases, etc.
The additional pieces of evidence would help to demonstrate that these effects are due to epigenetic changes including changes in the histone acetylation patterns. So, the correct option is D.
Epigenetic changes refer to the study of change in gene expression which is caused by a mechanism other than the change in the DNA sequence. It caused reversible changes that affect the expression pattern of the gene. It is passed from cell to cell via mitosis.
Therefore, above are both the questions that are briefly described one by one.
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HELP ASAPPP PLEASE!!!!!!!!!
Answers
Answer:
C. Active transport USES energy; passive transport does NOT .
Please mark my answer the brainliest and rate me 5 star and follow me .please please please please please please
Help me please Yall I swear this is so anoying
Answers
Explanation:
Photosynthesis is performed by all plants,algae and even some microorganisms. Which plants use sunlight,water and carbon dioxide to create oxygen and energy in the form of sugar/ aka glucose/food for plants
Hope this helps!
An amino acid's unique characteristics is defined by the ________.
Answers
A consumer
eats other organisms
makes its own food
is a wise shopper
Answers
I don't really understand your statement
For each graph, describe the trend in the amount of rainfall throughout the year. Include which month(s) have the lowest rainfall and which month(s) have the lowest rainfall
Answers
The climograph describes variation of temperature and precipitation in a region throughout the year.
What is a climograph?The climograph is a graphic representation that describes the type of clime in a region concerning temperature and precipitation throughout the year.
Even though several climatic elements compose the climate, only temperature and precipitation are considered to be the easiest climatic elements to measure.
The climograph considers the average temperature and precipitation levels per month. This is significant because it gives an idea of how these two variables change throughout the year, making evident what the dry and wet seasons are and the annual thermal amplitude.
To make a climograph, we need to consider the following
Months ⇒ horizontal ax ⇒ J, F, M, A, M, J, J, A, S, O, N, DTemperature ⇒ left vertical ax ⇒ in ºC or ºK. Scale from 5 to 5, or 10 to 10 ºC.Precipitation ⇒ right vertical ax ⇒ in millimeters or liters//m². Scale from 10 to 10, or 20 to 20.
Notice that the scale used for temperatures corresponds to half the scale used for precipitation. This is, for instance, 20ºC corresponds to 40mm/m².
As a general rule, the temperature is represented with a continuous line, while precipitation is represented with bars.
NOTE: To answer the question, I will attach an image with two climographs and will make an interpretation of each of them. Please, check if these graphs are the same as yours.
In both cases temperature is
higher during Dicember, January, February, and March. lower during the middle of the year.This pattern suggest that we are talking about the South hemisphere.
Park Territory climograph
Annual precipitation value ⇒ equals the addition of mean values per month (we can not calculate it from these images because we do not have the exact data). The whole year can be considered dry -arid- since the precipitation level per month throughout the year is always lower than the temperature level (Blue bars are lower than the red line). There is no wet season.The lowest precipitation values reach up to 10mm/m² (July and September) The highest precipitation values reach up to 200mm/m² (January-February).March, April, and November are intermediate months. Arid desertic clime ⇒ Annual precipitation < 300mm/m²Mount Gorongosa climograph
Annual precipitation value ⇒ equals the addition of mean values per month (we can not calculate it from these images because we do not have the exact data). There is a dry and wet season. The dry season occurs between April and November, a period during which precipitation is lower than temperature. The wet season occurs from December to March when the precipitation level is superior to temperature level. During the range between July and September the average precipitation value per month is the lowest concerning the rest of the year. The lowest precipitation values reach up to 40mm/m² (July, August, and September)December, January, February, and March are wet monthes, expressing the highest average values of precipitation. The highest precipitation values get near 350mm/m² (January-February).April, May, June, October, and November are intermediate months. Dry clime ⇒ Annual precipitation between 300-800mm/m²The general trend is that
Only dry season occurs in Park Territory. No wet season. According to the annual precipitation level, clime is desertic since it is inferior to 300 mm/m². Max. average precipitation value near 200mm/m². Min. average precipitation level near 10mm/m². The dry season in Mount Gorongosa occurs between April and November, while the wet season occurs between December, January, February, and March. According to precipitation level, clime is dry. Max. average precipitation value near 350mm/m². Min. average precipitation level near 40mm/m².
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a) Write down two factors they need to keep the same in their investigation
b) Write down the factor they change.
What do they measure to get their results?
water a light
Answers
Answer:
hope it helps mate
Explanation:
a) Two factors they need to keep the same in their investigation are the type of plant they are using and the amount of water and light they give each plant.
b) The factor they change is the amount of water and light they give to each plant.
To get their results, they measure the growth of each plant over a set period of time. They may also measure other factors such as the number of leaves, the height of the plant, or the color of the leaves to determine the overall health of the plant.
a) In their investigation, the students need to keep two factors the same:
1. Temperature: They must maintain a constant temperature of 25°C throughout the experiment.
2. Control substances: They need to keep the substances used in the control situation the same.
b) The factor they change is:
The students change the conditions related to the pH of the reaction mixture, the amount of yeast added, and the type of sugar used.
a) In their investigation, the students need to keep two factors the same:
1. Temperature: They must maintain a constant temperature of 25°C throughout the experiment. This ensures that any changes in the rate of fermentation are solely attributed to the variables they are testing.
2. Control substances: They need to keep the substances used in the control situation the same. This includes using 25 ml of buffer pH 7, 2 grams of sucrose, and 2 grams of yeast. Keeping these constant allows for a baseline comparison against the experimental conditions.
b) The factor they change is:
The variable being tested: The students change the conditions related to the pH of the reaction mixture, the amount of yeast added, and the type of sugar used. These variables are altered to observe their effect on the rate of fermentation.
To obtain their results, the students measure the pressure generated during the fermentation process. They use a Vernier Equipment Pressure sensor connected to a LabPro interface to record the pressure values over time.
By collecting and analyzing the pressure data, they can assess the rate of fermentation under different experimental conditions. The pressure readings indicate the gas produced as a byproduct of fermentation, providing a quantitative measure of the fermentation rate.
This allows the students to determine the optimal conditions for the new fermentation process to be used at the local bakery.
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Name 3 places in your body where Mitosis might take place
Answers
Answer:
It can take place in many areas. Three being the skin, hair and liver.
Explanation:
Answer:
skin tissues, hair and liver
Explanation:
What type of transport is being shown in the image below?
Facilitated Transport
Active Transport
Endocytosis
Osmosis
Answers
Answer:
Facilitated diffusion
Explanation:
energy is being used to move molecules with the concentration gradient
The type of transport showed in the image is Active Transport.
Active Transport is a type of transport that requires energy (e.g., ATP) to move substances through biological membranes.This process (Active Transport) is used by cells to move molecules against a concentration gradient, i.e., from areas of low concentration to high concentration.In active transport, different types of membrane proteins known as carriers help to move substances through the cell membranes.In conclusion, the type of transport showed in the image is Active Transport.
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While there is only one species of Galapagos Island tortoise, there are several subspecies. Larger islands with more wet highlands have lush vegetation near the ground. Tortoises there tend to have high-domed shells and shorter necks, which restrict upward head movement. They also have shorter limbs. They are the heaviest and largest of the subspecies. Smaller drier islands are inhabited by tortoises with longer necks and limbs and with shells that are elevated above the neck, which allow them to browse taller vegetation. Based on the information given, which is a plausible explanation for the ancestry of the tortoise subspecies?
Answers
Answer:
Tortoises with better adaptations in shell shape and leg length were selected to exploit the food resources on each island and, thus, they were capable of having more offspring.
Explanation:
Natural selection can be defined as the process of differential survival and reproduction in a given environment due to differences in their phenotypic traits. Thus, these phenotypic traits are selected to be better adapted to their environment. As a consequence of natural selection, organisms evolve by changing their phenotype frequencies over many generations. In this case, phenotypic differences are expressed as variations in shell shape and leg length, which are adaptive traits that were selected on each island.
Answer: D. Individuals with different adaptations in shell shape and leg length best exploited the food resource and left more surviving offspring in each island.
As an optician, you help to diagnose many common eyedisorders, such as nearsightedness and glaucoma. Currentlyin your office is Gabriel, a young boy who you just diagnosedas having red-green colorblindness. His parents, Catalina andRobert, seem surprised by this diagnosis, as neither of themis colorblind. They have many questions aboutcolorblindness. Using your knowledge of human genetics, youdo your best to answer their questions.
Answers
We can indicate the allele for colorblindness with lowercase b, and the allele for normal vision with a capital B. None of Gabriel's parents have the disease, but her mother is a carrier. This can be expressed as follows:
Gabriel's father
BB
Gabriel's mother
Bb
Another consideration that's needed to be done, is that this is an X chromosome-linked condition. We also know that XX is the chromosomes inherited by females, and XY the chromosomes inherited by males.
Having considered this, we can say that Gabriel's parents would have the following genotypes:
Gabriel's father
XBY
Gabriel's mother
XBXb
We have then this Punnet Square:
Upon this, we can say that there's an odd of 25 % of having a son with the disease, while a 75 % of having a healthy offspring (25 % of having a carrier daughter, and 50 % of having healthy-non carriers children).
So the correct statements of the question are the first one, the second one, and the final one.
