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
how is mitosis different in plants and animals
answers
A. in animals, the cell membrane pinches together.
B. in plants, the dna is one circular chromosome
C. in plants, there are no sister chromatids.
D. in animals, a new cell wall forms
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Answer:
a
Explanation:
In animal cells, the cell can simply split apart and the membrane will form on its own while with plant cells in order to split it must first form a cell plate that will later become a cell wall.
Which of the following country has the highest land area per person need to support their lifestyle
Answers
Answer:
USA
Explanation:
When 1 mole of PCl3 is produced, how many grams of Cl2 are produced ? Enter as a number correct to 2 decimal places
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Answer:
[tex]212.70[/tex] grams
Explanation:
Weight of one mole of Cl2 in grams = [tex]70.9[/tex]
Weight of one mole of PCl3 in grams = [tex]137.33[/tex]
Weight of one mole of chlorine atom in grams = [tex]35. 453[/tex]
From one molecule of PCl3, three molecule of chlorine gas can be produced.
Weight of three molecule of chlorine gas
[tex]= 3 * 70.9 \\= 212.70[/tex]grams
Which of the following describes a silent mutation?
A.Base pair change results in a premature stop codon; protein is nonfunctional.
B.Base pair change results in a different amino acid; this may or may not affect the protein that result.
C.Base is changed but the resulting amino acid is the same as in the non mutant DNA. No outward changes.
D.A base is either added or deleted and causes the codons to be read incorrectly.
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Answer:
C.
Explanation:
Feel Free to mark Brainliest if i get the answer right
Answer:
c
Explanation:
i go0gled in PFFT
what is the general trend in the elk and wolf populations between 1990 and 2000?
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Answer: Decrease
Explanation:
3.4 Briefly describe the purpose of conjugation in paramecia.
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Answer:
Conjugation is a process of exchange of genetic material between two organisms. paramecium is a unicellular protozoan in which true sexual reproduction is absent. so in these organisms conjugation brings genetic variatin in new generations.
Explanation:
The function of conjugation in paramecium is to exchange genetic material between organisms and make new combinations of genetic material.
Scientists are studying a layer of sedimentary rock and discover what appears to be ripples made by runding water preserved in the rock. When comparing those ripples to some made in mud at a present day location, they notice that the effects are identical. Based on the observations, which of the following is most likely to be true? OA. OB. The mud at the present day location is actually from the same time period as the rock The environment and conditions of both areas are exactly the same. OC. Some events that occurred in the past are similar or identical to events in the present. OD. Events that occurred in the past were dramatically different from those of today.
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There are certain past occurrences that are comparable to or exact replicas of current happenings.
What can be learned about dinosaurs and other extinct creatures from the strata found in sedimentary rock?They keep a record of the old flora, fauna, and climates. The fossils contained therein are frequently used by scientists to determine the correct order of sedimentary rock layers.
What does the depositional environment normally reveal about symmetrical ripples like those shown in the sandstone below?Ripples display "tuning-fork" branches and are symmetrical. This suggests to a geologist that wave action was present during the sandstones' deposition (nearshore).
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Which of the following is NOT true regarding meiosis?
A. The daughter cells have half of the original DNA.
O B. Only occurs in somatic (body) cells.
O C.
C. Only occurs in sex cells (gametes).
D. 4 daughter cells are produced from one parent cell.
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which is a reason cells divide?
A. to prevent tumor formation
B. to have a smaller surface area
C. to reproduce
D. to stop binary fission
Answers
Answer:
C. to reproduce
Explanation:
All living cells undergo division to produce more identical or different cells. The major types of cell divisions that cells undergo are; mitosis and meiosis. Mitosis results in two identical daughter cells being produced from a single cell while meiosis results in four daughter cells being produced.
The primary aim of any form of cell division is to REPRODUCE or PROCREATE the number of cells. For example, mitosis produces two (2) cells from 1 and so on....
Answer: C. to reproduce
Explanation:
I just did this on a p e x and I got it correct :)
how do some cells make food molecules
Answers
Answer:
All living cells release energy from food molecules through cellular respiration and/or fermentation. Some cells make food molecules using light energy through the process of photosynthesis. lol
Carbon-14 is a radioactive isotope of carbon that has a half-life of about 5,730
years. You have discovered a fossil and want to know how old the fossil is. You count
the parent and daughter atoms and calculate that you have about 6.25% of the
parent atom (carbon-14) left. How old is the fossil? (Provide units (years) for your
final answer. You must show your work.
2 points for showing work
1 point for final answer with units
Answers
Answer:
22,920 years
Explanation:
When the fossil first started to decay, it must have had 100% of its parent carbon-14 atoms. Every 5,730 years, that amount gets cut in half. Let's travel back a ways, to the very beginning, 0 years into the decay. We'll keep track of the time elapsed, the number of half-lifes, and the percent of carbon-14 remaining:
0 years (0 half-lives) - 100%5,730 years (1 half-life) - 50%11,460 years (2 half-lives) - 25%17,190 years (3 half-lives) - 11.5%22,920 years (4 half-lives) - 6.25%That last one represents our situation, so the fossil is 22,920 years old.
according to a mangrove food web which organism is a producer in the mangrove swamp Crab, Mold, Pelican, Or Phytoplankton
Answers
Answer:
Phytoplankton.
Explanation:
This is because in the mangrove swap, phytoplankton is a green plants that have green pigment called chlorophyll uses light energy from the sun with carbondioxide and water to produce carbohydrates. Phytoplankton is a primary producer because it manufacture it food through the process of photosynthesis and it is the source of flow of energy in the habitat.
Question 5
The specific heat of water is higher than the specific heat of sand. That is why water heats up more slowly than sand,
True or false hurry please
Answers
The genetic information of a cell is duplicated and split to form two daughter cells during which of the following processes
Answers
Answer:
Cell Division
Explanation:
A definition to cell division: Cell division is the process by which a parent cell divides into two or more daughter cells. Cell division usually occurs as part of a larger cell cycle. Hope this helped. :)
What occurs in the small intestine?
A. churning
B. nutrients are absorbed
C. water is absorbed
D. breaks down food using gastric
juices
Answers
Answer:
B
Explanation:
the small intestine absorbs all the nutrients you get from your food into the bloodstream
Answer:
b
Explanation:
in the small intestine, it absorbs the nutrients and those nutrients go into the bloodstream. sorry if this explanation sucked.
Which molecule is used to cut out a section of DNA? A. Restriction endonuclease. B. Reverse transcriptase C. Gel electrophoresis D. DNA polymerase
Answers
Explanation: None just know it
Please help with this.
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Explanation:
Central Asia is where middle-Eastern Islamic culture meets Russian Soviet culture. The countries of Central Asia were once the center of multiple nomadic empires and tribes, including the Scythians, Mongols, and Turks. This had a big influence on the traditions and cultures of many Central Asian countries to this day.
Based on the amino acid sequence data from the table below, which of the statements is true
Answers
Answer:
A
Explanation:
What are the four levels of organization in living things? a. cell, multicellular, organ, organ system b. single cell, multicellular, tissue, organ c. larger size, longer life, specialized cells, organs d. cell, tissue, organ, organ system
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Help plz
environmental cues can affect gene expression and protein synthesis.
true or false
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Answer:
pretty sure its true
Explanation:
All of the energy comes from the sun but ______________ capture this energy.
(Copy pasted)
Please answer
Answers
Answer:
chloroplasts
Explanation:
plants and other organisms capture the energy, but if you wanna get really specific its chloroplasts
Any permanent change in a gene is called a
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Hii please help me...
Answers
Match each of the following hormones with the endocrine gland or structure that produces it. Match the words in the left column to the appropriate blanks in the sentences on the right. Words may be used more than once.
a. parathyroid glands
b. anterior pituitary
c. hypothalamus
d. thyroid gland
e. thymus gland
f. adrenal medulla
g. pancrease
h. adrenal cortex
A. Growth hormone
B. Prolactin (PRL)
C. Adrenocorticotropic hormone (ACTH)
D. Thyrotropic hormone (TH) or thyroid-stimulating hormone (TSH)
E. Luteinizing hormone (LH) hypothalamus
F. Oxytocin
G. Antidiuretic hormone (ADH) or vasopressin
H. Follicle-stimulating hormone (FSH)
I. Thyroxine (T1)
J. Calcitonin
Answers
Answer:
A. Growth hormone- anterior pituitary
Prolactin - anterior pituitary
Adrenocorticotropic hormone- anterior pituitary
Thyrotropic hormone- anterior pituitary
Luteinizing hormone - anterior pituitary
Oxytocin - hypothalamus
Antidiuretic hormone - hypothalamus
Follicle-stimulating hormone- anterior pituitary
Thyroxine (T1) - thyroid gland
Calcitonin - thyroid gland
Explanation:
The growth hormone is released from the anterior pituitary gland. The hormone acts on many parts of the body and promotes growth especially in children.
The hormone prolactin is produced in the anterior pituitary gland during pregnancy in order to develop breast tissues and prepare for milk production.
Adrenocorticotropic hormone (ACTH) helps the body to respond to stress conditions. It stimulates the production of cortisol from the adrenal gland.
TSH is produced by the pituitary gland and controls the production of the thyroid hormones.
Luteinizing hormone is one of the hormones produced by the pituitary gland.
Oxytocin is produced in the hypothalamus and is secreted into the bloodstream directly. It is important in female reproduction and is produced in large amount during labor. It is also released when the nipples are stimulated.
Antidiuretic hormone controls of the amount of water lost via urine. It is produced in the hypothalamus.
Follicle-stimulating hormone is another hormone produced by the pituitary gland. It plays an important role in sexual development especially in women where it controls the menstrual cycle and assists in the growth of eggs.
The thyroid gland produces many thyroid hormones including T1,T2,T3 and T4.
The thyroid gland also produces calcitonin, a hormone secreted by the thyroid gland and regulates the amount of calcium in the blood.
Hello !
So are pants made out of organic or inorganic.
Or plant, animal, mineral.
please don’t guess :)
Answers
Results in science are not generally accepted as being accurate until they can be verified. Which of the following is an example of repetition in science? A.A student designs an experiment on plant growth that includes multiple trials. B.One scientist carries out the same experiment performed by another scientist to validate the results. C.A scientist poses a new question for investigation after reading the results of another scientist’s work. D.A scientist analyzes the data included in the published work of another scientist and agrees with the conclusions
Answers
Answer:
B) One scientist carries out the same experiment performed by another scientist to validate the results.
Explanation:
repetition definition is basically B.
One scientist carries out the same experiment performed by another scientist to validate the results. Therefore, option (B) is correct.
What is repetition?Repetition in science is the process of repeating an experiment or study to verify or validate the results. This is done to ensure that the results are accurate and reliable, and not due to chance or experimental error.
An example of repetition in science is when one scientist carries out the same experiment performed by another scientist in order to validate the results and confirm that they are accurate and consistent. This process helps to build confidence in the results and increases the credibility of the scientific findings.
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Transcribe the following DNA strand. Then translate the tRNA strand you wrote.
Answers
Answer:
Transcription into mRNA strand will produce: ACU CAG CUG ACC GAC UGG CAU CUG
Translation into amino acid sequence will yield: Threonine- Glutamine- Leucine- Threonine- Aspartic acid- Tryptophan- Histidine- Leucine
Explanation:
- Transcription is the process by which DNA template is used to synthesize a mRNA molecule in the nucleus (eukaryotes). The transcription, which is carried out by an enzyme called RNA polymerase, follows the complementary base pairing rule i.e. A-T, G-C. Note that Uracil replaces Thymine in the RNA molecule.
Based on this question in which a DNA strand was given as follows: TGA GTC GAC TGG CTG ACC GTA GAC
The mRNA strand that will result from transcribing this DNA will be: ACU CAG CUG ACC GAC UGG CAU CUG
- Translation is the process by which mRNA strand is used to synthesize amino acid sequence (protein) in the ribosomes. In the mRNA sequence, nucleotides are read in a group of three called CODONS. Each codon specifies an amino acid. Based on the mRNA sequence as follows: ACU CAG CUG ACC GAC UGG CAU CUG, the amino acid sequence that will result after using the genetic code will be: Threonine (Thr)- Glutamine (Gln)- Leucine (Leu)- Threonine (Thr)- Aspartic acid (Asp)- Tryptophan (Try)- Histidine (His)- Leucine (Leu).
Which of the following is not part of the cell
theory?
Answers
Answer:
All vital functions of an organism occur within its cells
Explanation:
WHY THE OTHER CHOICES ARE PART OF THE CELL THEORY
1st choice- When a cell reproduces, it splits. This means that BOTH of the cells are exactly the same.
2nd choice- ALL organisms, from bacteria to elephants are made of cells, either multicell or unicell
3rd choice- Cells split to reproduce, so yes
What is the genotypic ratio of the following cross? RR X Rr ?
100% Red
2:20
3:1
O
2:2:1
Answers
Answer: the genotypic ratio is 2:2:0
Explanation:
RR x Rr —> RR Rr RR Rr
You want to determine if black coat color (B) and long tail length (T) are linked in a new breed of dog (white coat and short tails are recessive). Design a two-point test cross to determine if this is indeed the case. What results would you expect if the genes were linked
Answers
Answer:
If the genes were linked, the phenotypic and genotypic ratios would be different from 1:1:1:1. The observed proportions in the F1 would be different than the expected ones if genes would assort independently.
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files