Cara is explaining to her sister how the solar system formed. Which description would she use to explain the solar nebula
A. a rotating cloud of dust and gas
B. a disk of material surrounding a young star
C. a small body from which planets form
D. a rocky core surrounded by a deep atmosphere of gas and ice
Answer:
The correct answer is A. a rotating cloud of dust and gas.
Explanation:
Nebulae are regions of the interstellar medium (clouds) made up of gases (mainly hydrogen and helium) and dust. In other words, nebulae are concentrations of gas in which we find hydrogen, helium and stardust in greater quantities. They are structures that are actually very important for the universe, this because inside it is the place where stars are born, which arise due to the condensation and aggregation of matter. The nebular theory states that the Solar System reached the form current from a solar nebula (a gas cloud), more than 4.5 billion years ago. The large cloud of molecular gas was affected by a certain phenomenon that would have taken place in the vicinity. Like the explosion of a supernova or the passage of a star that would produce a strong gravitational impact. The result of this event made the matter agglomerate in different places. The high concentration of matter caused the nebula to collapse. Becoming a protostar, (bodies whose characteristic is to be surrounded by clouds and contain preplanetary matter inside), that is, gaseous matter in the outermost part and solid inward. At the core of this structure, the temperature is so dominant that nuclear reactions take place to compensate for the gravitational force. This leads to a hydrostatic equilibrium and the formation of a fundamental star: the Sun. The rest of the mass flattened, forming a protoplanetary disk where the protoplanets were being formed, which would evolve to become the current planets, their satellites and the others bodies of the solar system.
what two gases easily diffuse through the phospholipid bilayer
Answer:
Consider substances that can easily diffuse through the lipid bilayer of the cell membrane, such as the gases oxygen (O2) and CO2. O2 generally diffuses into cells because it is more concentrated outside of them, and CO2 typically diffuses out of cells because it is more concentrated inside of them.
. Which stage of the life cycle will occur after the seeds are planted in the soil and watered?
A. pollination
B. fertilization
C. germination
D. seed dispersal
Answer:
c germination...........
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RR = Red WW = White RW = roan
1. A roan cow is crossed with a red cow.
What percent of the offspring will be red?
2. A red cow is crossed with a white cow.
What percent of the offspring will be roan?
3. A roan cow is crossed with a white cow.
What percent of the offspring will be roan?
What percent will be red?What percent will be white?
How is the formation of RNA similar to DNA replication?
Answer:
Both DNA replication and Transcription involve the generation of a new copy of the DNA in a cell. DNA transcription is involved in replicating the DNA into RNA, while the DNA replication makes another copy of DNA. Both the process is involved in the production of new nucleic acids- DNA or RNA.
Explanation:
The formation of RNA is similar to DNA replication because both processes require an analogous enzyme (Polymerase).
What is DNA replication?DNA replication refers to the process of duplication of the genetic material before cell division (either mitosis or meiosis).
DNA replication requires different enzymes such as DNA polymerase, ligase, RNA primase and topoisomerase. Moreover, RNA replication or transcription also requires a nucleotide polymerase (RNA pol), which uses DNA as a template to generate complementary RNA.In conclusion, the formation of RNA is similar to DNA replication because both processes require an analogous enzyme (Polymerase).
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Chromosome's tightly coiled structure enables them to be
properly segregated during ____
Answer:
Chromosomes are coiled structures made of DNA and proteins. Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures proper segregation of the chromosomes during cell division. During other phases of the cell cycle, DNA is not coiled into chromosomes
Chromosomes' tightly coiled structure enables them to be properly segregated during cell division.
Chromosomes:Chromosomes are coiled structures made of DNA and proteins.Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures the proper segregation of the chromosomes during cell division.During other phases of the cell cycle, DNA is not coiled into chromosomes. It exists as a grainy material called chromatin.
Thus, we can conclude that during cell division chromosomes' tightly coiled structure enables them to be properly segregated.
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Explain how carbon dioxide and oxygen are used by living organisms
Answer:
During cellular respiration animal cells combine oxygen with food molecules to release energy to live and function. Remember that cellular respiration produces carbon dioxide as a waste product. Animals use energy to grow, reproduce, and to function. They release the carbon dioxide into the air as a waste product
Explanation:
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Answer:
During cellular respiration animal cells combine oxygen with food molecules to release energy to live and function. Remember that cellular respiration produces carbon dioxide as a waste product. Animals use energy to grow, reproduce, and to function. They release the carbon dioxide into the air as a waste product.
RNA is used in the process of translation to build proteins. Which of these correctly describes the role of the different types of RNA in
protein synthesis? Choose ALL that apply.
A)
rRNA makes up the ribosome.
B)
ERNA carries amino acids to ribosome.
C)
tRNA carries nucleotides to the ribosome.
D
mRNA copies the genetic code from DNA and carries it to the ribosome.
mRNA code is read to determine the sequence of amino acids in the
protein
Answer:
I think its A and D
Explanation:
Sorry if I'm wrong good luck.
(b) Many amphibian species throughout the world are endangered
Suggest three reasons why many amphibian species are endangered
Answer:
The correct answer is - habitat loss, pollution and disease, and climate change.
Explanation:
Many amphibians are endangered due to several reasons including, habitat loss, climate change, pollution and disease, non-native species invasion, and many others. Amphibians are mostly live in damp habitats or moist soil and low-level water and these habitats are destroys due to pollution, deforestation or excess fishing.
Pollution and disease also affect these species most specifically chytridiomycosis, caused by the chytrid fungus was an epidemic for many amphibians. Climate change also affects the temperature and soil quality precipitation of the habitat that not suitable for these species.
how do you do Math on The periodic Table
Answer:
you don't the periodic table is for chemistry
chemistry involves math so maybe thats how
Explanation:
While having dinner, your little sister says she learned about energy and matter at school today and that the food you are eating and the energy you receive from it have been consumed and used previously. Your family is surprised by this and since you are the older sibling, they have asked you to explain whether your little sister is correct or not.
5-8 Complete sentences
Answer:
She is correct
Explanation:
The reason why she is correct because everything had come from something. For example, if a farmer is eating an apple, takes the seeds out, and plants them, the apple you are eating right now came from the farmer's apple. This means that it had been used previously. An example of it being consumed previously is if an animal had eaten an apple, put its feces on the ground, and left, the seeds from the apple will eventually grow. This could have been how your apple has grown. This could be an example of most foods we eat.
Which is an effect of a compromised immune system?
decreased antibody production
improved ability to fight disease
increased lymphocyte production
reduction in pathogens entering the body
Answer:
A: Decreased antibody production
Explanation:
It's the only one that makes sense when you think about it.
Decreased antibody production is an effect of a compromised immune system. So, the correct option is A.
What is an Immune system?The immune system is a complex system of cells, tissues, and organs that cooperate to defend the body against foreign pathogens, including bacteria, viruses, and fungi, as well as other dangerous chemicals. It plays an important role in maintaining the health of the body, by discriminating between foreign invaders and the body's own healthy cells and tissues.
White blood cells of all stripes, including lymphocytes, phagocytes, and natural killer cells, as well as other specialized cells and substances, including antibodies, complement proteins, and cytokines, make up the immune system. Together, these proteins and cells help the body recognize and destroy invading invaders.
Therefore, the correct option is A.
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Given the strand of DNA with the sequence : G-A-C-A-T-T-C-C-G...
Column A
Column B
1.
What is its complementary strand?
a. C-T-G-T-A-A-G-G-C
2.
b. G-A-C-G-A-T-T-C-C-G
Which sequence represents and insertion /
addition?
Which sequence represents a deletion?
3.
C. G-A-C-T-A-T-C-C-G
4.
d. G-A-C-A-T-C-C-G
Which sequence represents an inversion
mutation?
Answer:
1. Given the DNA sequence: G-A-C-A-T-T-C-C-G, the complementary sequence is C-T-G-T-A-A-G-G-C (a).
2. Given the DNA sequence: G-A-C-A-T-T-C-C-G, the insertion sequence is G-A-C-G-A-T-T-C-C-G (b).
3. Given the DNA sequence: G-A-C-A-T-T-C-C-G, the deletion sequence is G-A-C-A-T-C-C-G (d).
4. Given the DNA sequence: G-A-C-A-T-T-C-C-G, the inversion sequence is G-A-C-T-A-T-C-C-G (c).
Explanation:
The complementary sequence of DNA is a sequence of complementary nucleotides. The complement is a nitrogenous base that correctly pairs with the base that is given. In DNA, Adenine (A) correctly pairs with Thymine (T), and Guanine (G) with Cytosine (C). Therefore, the complement of A is T, and of C, is G.
The given sequence complement would be C-T-G-T-A-A-G-G-C since it's a sequence of bases that correctly pairs with the given sequence, G-A-C-A-T-T-C-C-G. [ G-A-C-A-T-T-C-C-G | C-T-G-T-A-A-G-G-C ] Notice that the first base in the sequences is G and C respectively. The next two are A and T. The paring is such that C complements G, and that A, T.
2. An insertion sequence is one in which there is an extra added nucleotide or codon. [ G-A-C-A-T-T-C-C-G ] Notice that there are three Triplets in this sequence. In a case where there is an extra nucleotide(s) or codon(s), such is termed an insertion mutation. When the given sequence is compared with the sequence in option b, G-A-C-G-A-T-T-C-C-G, you can observe an extra nucleotide [G - the fourth letter in the sequence]. Therefore, this sequence is called an insertion sequence.
3. Deletion mutation is an error in the DNA replication process that removes a nucleotide(s) from the genome. Hence a sequence that has a nucleotide(s) removed from the original sequence is called a deletion sequence. With the given sequence, G-A-C-A-T-T-C-C-G, the deletion sequence to this is G-A-C-A-T-C-C-G. [G-A-C-A-T-C-C-G ] Notice that one of the nucleotides, T, is missing.
4. Inversion mutation is a chromosome rearrangement in which a chromosome is reversed end to end. This involves breaking and rearrangement within a sequence. With the given sequence, G-A-C-A-T-T-C-C-G, an inverted sequence is G-A-C-T-A-T-C-C-G. [ G-A-C-T-A-T-C-C-G] Notice the first two nucleotides, of the second codon (....-T-A-T-...). The original sequence has....-A-T-T-...., but the new sequence here has...-T-A-T-.... Suggesting that the first two nucleotides were broken and rearranged end to end.
How many types of rocks can form from the rock cycle?
1
2
3
4
Answer:
The answer is 3. Its C on edge.
Explanation:
I took the test, trust me.
Ella and Olivia are sisters. Both sisters are taller than average, but each sister has specific traits the other sister does not. Ella is a competitive swimmer who trains outside in the summer. Her hair is bleached blond by the sun and chlorine in the pool water. Her many hours of practice have made her fit and muscular. Olivia loves to help people and wants to become a nurse someday. She volunteers every week at the nursing home where her great-grandmother lives. She walks the residents to and from their daily activities, and in the evening during dinner, plays the piano beautifully for them. Which of the following traits is inherited? a Piano Skills b Strong muscles c height d sun-bleached hair
Answer:
a
Explanation:
describe the process of transformation from start to finish. Be sure to use the following terms in your response: restriction enzyme, ligase, plasmid, DNA, protein, gene, and sticky ends, and recombinant DNA.
The process of transformation are as follows:
restriction enzymes are used to cut the desired DNA from the organism as well the plasmid producing sticky endsThe plasmid is then inserted into the host organism.The host organism incorporates the plasmid producing recombinant DNA. The recombinant DNA is expressed by the host organism to produce proteins. What is transformation?Transformation is the process whereby genetic material from another organism is incorporated into the nucleus of another organism.
The steps in transformation are as follows:
restriction enzymes are used to cut the desired DNA from the organism as well the plasmid producing sticky endsThe plasmid is then inserted into the host organism.The host organism incorporates the plasmid producing recombinant DNA. The recombinant DNA is expressed by the host organism to produce proteins.Learn more about recombinant DNA at: https://brainly.com/question/91488
5. The ____
controls the rate of breathing.
Answer: respiratory control centers
Explanation: respiratory control centers: The medulla which sends signals to the muscles involved in breathing, and the pons which controls the rate of breathing.The medulla oblongata is the primary respiratory control center. Its main function is to send signals to the muscles that control respiration to cause breathing to occur.
Answer:
medulla oblongata
Explanation:
its a part of the raspatory response in your brain
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16.
value:
10.00 points
Which of the following defines a postzygotic isolating mechanism?
Gametes don't recognize each other, and fertilization doesn't take place.
Offspring produced are infertile, as they have a random number of chromosomes.
Individuals discard each other, as they don't have the same mating rituals.
Ο Ο
Different species have different sex organs, which aren't compatible.
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Answer: C, offsprings produced are infertile
Explanation: I just got it right on my test
What is the answer please help no links I will report you if you put a link
what is the impact of not having personal goals.
Answer:
The Future is Stagnant. When your goals are poorly thought out, the path to the future becomes muddled. ...
Productivity is Wasted & Markers of Success Are Skewed. ...
Work Becomes Frustrating. ...
Creativity Suffers
Explanation:
A bottle of concentrated 20 M ammonia solution needs to be diluted to
1 M strength for laboratory use. In order to make up 1 L of 1 M
ammonia solution, how much concentrated ammonia must be diluted?
Answer:
The aim of question is to know about molarity of ammonia solution 25% . ... If you have 17 g NH3 in 1000 ml H2O, you have a 1M NH3. ... Can you not titrate it using standardised acid? ... Mass concentration of ammonia in stock solution = ... So 1 M means 35.04gr in a liter of water and because the solution ...
9 answers
·
Top answer:
The ammonia solution (NH3) of 25% means 25 gr NH3 in 100 ml water.
Explanation:
How would the dynamic of an ecosystem and rate of evolution change there was an unlimited supply of resources, including food, space and water?
Answer:
The population will be large and evolution process is slow.
Explanation:
There will be large population of organisms present in the ecosystem and slow rate of evolution when there is unlimited supply of resources such as food, space and water etc because these resources are needed by the organisms to increase their population. There is also a slow rate of evolution when there are plenty of resources because limited resources also increase the chance of evolution and when there is no competition among organisms, the rate of evolution slower down.
Examine how the circulatory and respiratory system work together to move oxygen through the body.
Answer: The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Read each case file and fill in a cytogenetics report form for each case file.
6. a) In what way is the genetic code in all organisms the same? (1 point)
Answer:
they all come from the same ancestor, and all organisms have DNA made of the same molecules that form our genetic code. DNA in every organism has the bases: A,T,C,G.
Also, don't use this if it's still June 2021 and you're doing ap ex, we might have the same teacher.
All living organisms use the same genetic code. This shows that all organisms share a common evolutionary history.
What is a genetic code ?The genetic code is the set of rules used by living cells to translate information encoded within genetic material into proteins. It is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis.
The genetic code is universal. Living systems use nucleic acids and the same three-base codons to direct the synthesis of proteins from amino acids. For example, the mRNA codon UUU, codes for phenylalanine in all cells of all organisms.To know more about genetic code here
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Which statement best describes biodiversity? *
5 points
A) a geographic area on earth that contains ecosystems
B) The variety of life in a habitat or ecosystem
C) An area that receives very little rain
D) A nonliving thing that affects an ecosystem
Answer:
B)
Explanation:
It refers to all the variety of life that can be found on Earth (plants, animals, fungi and micro-organisms) as well as to the communities that they form and the habitats in which they live.
IT WOULDN'T LET ME ANSWER. NOW YOU SAID TO HELP ME TOO.
DNA connects to the theory of
evolution because...
Answer:
It connects
Explanation:
Since humans and other organisms have tens of thousands of genes, DNA contains a huge amount of information about the evolutionary history of each organism.
How many layers are in a gram positive cell wall and how many are in a gram negative cell wall ?
The cell wall of gram-negative bacteria is thin (approximately only 10 nanometers in thickness), and is typically comprised of only two to five layers of peptidoglycan, depending on the growth stage. In gram-positive bacteria, the cell wall is much thicker (20 to 40 nanometers thick).
if there is not crossing over,tha gametes are
3. Some organelles are present in both plant and animal cells. Each organelle performs a different
function. Which of the functions listed below are performed by organelles found in both plants
and animals?
Answer:
Organelles that are present in both forms of eukaryotic cells are the following :
Nucleus
Endoplasmic Reticulum
Ribosomal units
Golgi apparatus
Lysosomes
Perixosomes
Mitochondrion
Cytoskeleton/Cytosol
Vacuole
Nucleolus
Plasma membrane
Microtubules/Microfilaments
All celluar functions corresponding to the organelles can be found in both plant and animal cells
Explanation:
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