Most scientists agree that life began on earth approximately 3.5 billion years ago. What would a scientist need to do in order to test this hypothesis and gather evidence?
A: Recreate the composition of the atmosphere and oceans on Earth as they were 4.5 billion years ago.
B: Travel to a similar planet or moon in its own early formation and recreate the chemical reactions which took place on Earth.
C: Gather the raw materials, such as inorganic compounds, on Earth 4.5 billion years ago and recreate the chemical reactions that could have taken place.
D: This is not a testable hypothesis since there is no way to travel back 4.5 billion years or to run the experiment for the next 4.5 billion years.
Answer:
A
Explanation:
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
Question 1: One of the central themes in biology is how DNA, RNA, and proteins are related. Describe how genetic information flows between those types of molecules. Include the results of the processes of transcription and translation? ( Will Mark Brainliest if answered correctly. Do Not Repost Someone Else's Answer that is already on Brainly or any other websites please).
Answer:
Translation is the process by which mRNA is decoded and translated to produce a polypeptide sequence, otherwise known as a protein. This method of synthesizing proteins is directed by the mRNA and accomplished with the help of a ribosome, a large complex of ribosomal RNAs (rRNAs) and proteins. In translation, a cell decodes the mRNA’s genetic message and assembles the brand-new polypeptide chain. Transfer RNA, or tRNA, translates the sequence of codons on the mRNA strand. The main function of tRNA is to transfer a free amino acid from the cytoplasm to a ribosome, where it is attached to the growing polypeptide chain. tRNAs continue to add amino acids to the growing end of the polypeptide chain until they reach a stop codon on the mRNA. The ribosome then releases the completed protein into the cell.
Answer:
DNA is the code that stores all our genetic information. When making a protein, DNA has to go through transcription and then translation. In transcription, an the genetic code of DNA is copied to mRNA, with the aid of an RNA polymerase protein which attaches single RNA units to the mRNA strand as the RNA polymerase moves on the DNA. Note that instead the letter T, RNA contains U. This occurs in the nucleus. The mRNA travels to the cytoplasm to a ribosome. The RNA also trims itself, removing parts that it does not need, and keeping parts for translation. The ribsomes use tRNA attached to amino acids to assemble the protein chain and translate the mRNA into proteins. As the amino acid chain, or polypeptide forms, a protein comes to be. However, there may be mutations, resulting from translation or transcription and sometimes these mutations may cause harmful affects.
When might you take a deep breath?
Answer:
When you're stressed??
Explanation:
i don't really know I never learned this, but I hope this helps
Answer:
In fresh morning......or when ur stressed......or simply when u feel like .......
3. Which of the following statements about exergonic (energy releasing) reactions is NOT true?
a. They release energy
b. Glucose metabolism is an example
c. Their products have more energy than the reactants
d. There is a net energy loss
e. Bonds are broken
Answer:
d. There is a net energy loss
PLEASE HELP WITH THIS ONE QUESTION
Which statement about oogenesis is correct?
A) Diploid secondary oocytes undergo meiosis II to form a haploid ootid cell and a polar body.
B) Haploid secondary oocytes undergo meiosis II to form a diploid ootid cell.
C) Two diploid secondary oocytes undergo meiosis II to form four haploid ootid cells.
D) Haploid secondary oocytes undergo meiosis I to form a haploid ootid cell and a polar body.
Answer:
A is correct.
Explanation: At the end of meiosis II there are 3 polar bodies and one octet that are all haploid.
Isomers are molecules that have the SAME molecular formula, but their atoms are bonded in a different way. Draw the 5 isomers of cyclopentane, C5H10 using Line Structural Diagrams only.
Answer:
1.methylcyclobutane
2.1-pentene
3.2-pentene(which can be Cis or Trans)
4.1,3-dimethylcyclopropane
5.ethylcylcopropane
Explanation:
you don need to actually chew the bread. you can just break it up into smaller pieces. which variable will you change in your investigation?
Answer: The type of bread (independent variable)
Explanation:
You can just change the type of bread you are eating and just hold it in your mouth to test your hypothesis of not having to chew the bread. It’s the easier thing to change when making the experiment. Now your bread is your independent variable because you are not changing anything else but the type of bread. Not sure if your question is talking about the technical terms for the variable or what actual variable in the experiment, so I put down both.
How many genes are shared by all viruses?
Answer:
200 approximate
Explanation:
depends how many in common
Where does carbon dioxide enter aplant
Answer:
through its leaves.
Explanation:
The diagram shows an ocean food web. Which organism is a primary consumer? krill elephant seal Killer whale Elephant seal O squid O penguin Penguin Leopard seal Squid Cod Krill Zooplankton Phytoplankton
Answer:
Krill
Explanation:
If you look at the diagram for this assignment, you can see the main organism that produces its own food is the phytoplankton. The animal that eats that organism is called a primary consumer. So, if you were to follow the arrow from the phytoplankton (or the producer), it would lead you to the zooplankton, krill, and cod. Since there are only one of these primary consumers as the choices, you would pick the only one available for the multiple choice, which would be krill :D
Answer:
A. krill
Explanation:
None of the other organisms are primary consumers.
A mother has blood type A and her son has blood type O. Which blood types are possible for the father?
Guys should I cut my hair
Explanation:
why ?????
Answer:
for me I will say no because you will not be as fine as now and why do you want to cut your hair
Sofia, a scientist, wants to change the DNA of a sexually reproducing organism and have the
new DNA present in every cell of the organism. In order to do this after fertilization, she would
change the DNA in which of the following?
A. Zygote
B. Placenta
C. Testes of the father
D. Overuse of the mother
Sofia, a scientist, wants to change the DNA of a sexually reproducing organism and have the
new DNA present in every cell of the organism. In order to do this after fertilization, she would
change the DNA in which of the following?
A. Zygote
B. Placenta
C. Testes of the father
D. Overuse of the mother
Answer :C. Testes of the father
ありがとうございました!
Explanation:Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. An X chromosome combines with the mother's X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mother's to make a boy (XY)
a person gets energy from an apple by eating it. How does energy get into the apple in the first place? A the apple absorbs energy from the soil while it is on the tree B. the apple absorbs energy from the sun when it is in sunlight. C, the apple tree stores energy from the sun in the apple as sugar. D. the apple tree stores energy from the soil in the apple as sugar.
Answer:
The apple tree stores energy from the Sun in the apple as sugar.
Explanation:
study island
What type of molecule is represented by the model below?
Carbohydrate
Steroid
Fat
Nucleic acid
Question 2 Multiple Choice Worth 3 points)
(01.02 LC)
Which type of force results when an object touches another object?
O Contact force
O Gravitational force
O Non-contact force
O Magnetic force
PLS HURRY!!
Answer:
contact forces is answer
help :(
Which of the following explains a similarity between the current farm bill and the Agricultural Adjustment Act (AAA) of 1933?
Both include payments given directly to farmers.
Both require the government to buy from certain growers.
Both set standard prices for produce commodities.
Both are designed to only benefit impoverished people.
Answer:
both set standard prices for produces commodities.
Answer:
Both require the government to buy from certain growers .Hope this helps you !!Which part of the sentence given below has an error in it? Lizza and Mike/ lives happily even in a/ small cottage near their farm. 1. lives happily ever after in a 2. No error 3. Lizza and Mike 4. small cottage near their farm "(tejyb nphkt)"
Answer:
Liza and Mike are two persons so that they are plural. Therefore they take '' live'' not' ''lives''
Why Should We Add Crickets In Our School Lunches?
Introduction
Answer:
Because it is rich in Protein and also gross
Explanation:
Question 1) Discuss the types of trace elements in organic compounds? ( Will Mark Brainliest).
Answer:The trace elements are those organic compounds that are needed for the growth and maintenance of plants from the soil in small amounts.
Explanation:
The types of trace element which are also called non-essential elements include:
Copper: This takes part in chlorophyll and seed production.
Boron: This takes part in the maintenance of structural and functional integrity of biological membranes.
Molybdenum: This is required for the synthesis and activity of the enzyme nitrate reductase used in the synthesis of amino acids in plant cells.
Manganese: This sustains the metabolic roles within different plant cell compartments; and
Zinc: This is responsible for the synthesis of certain proteins.
Explain how one change in the Earth's biosphere can
cause changes in other Earth systems.
Answer:
interaction in the Earth's biosphere cause the change in other Earth system as the biosphere and atmosphere are dynamic, constantly reflecting these interaction. and Biosphere-Atmosphere Interactions focuses on the sources and sinks of greenhouse gases (GHGs), air pollutants, particulate matter, water, and energy between the Earth's surface and the atmosphere.
The Earth's biosphere is closely interconnected with other Earth systems, such as the hydrosphere (water), atmosphere (air), and geosphere (land). Changes in one part of the Earth's biosphere can have significant impacts on other Earth systems, and vice versa
What is a biosphere?Biosphere means interactions with each other and their physical environment.
For example, changes in land use, such as deforestation or urbanization, can affect the Earth's water cycle and climate. Deforestation, for example, can lead to increased runoff and erosion, which can alter the availability and quality of water in an ecosystem. Deforestation can also lead to an increase in atmospheric carbon dioxide, as trees and other vegetation absorb and store carbon dioxide during photosynthesis. This can contribute to global warming and climate change.
Similarly, changes in the Earth's climate, such as an increase in temperature or a change in rainfall patterns, can affect the biosphere. Warmer temperatures can lead to the range expansion of certain species and the loss of habitat for others. Changes in rainfall patterns can affect the availability of water for plants and animals, which can lead to changes in the distribution and abundance of species in an ecosystem.
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describe the mechanism of blood sugar regulation (20 marks)
Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon. Glucagon instructs the liver to release stored glucose, which causes blood sugar to rise.
The pancreas releases glucagon when glucose levels fall too low. Glucagon causes the liver to convert stored glycogen into glucose, which is released into the bloodstream. High BG levels stimulate the release of insulin. Insulin allows glucose to be taken up and used by insulin-dependent tissues, such as muscle cells.p
Answer:
Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon. Glucagon instructs the liver to release stored glucose, which causes blood sugar to rise.
The pancreas releases glucagon when glucose levels fall too low. Glucagon causes the liver to convert stored glycogen into glucose, which is released into the bloodstream. High BG levels stimulate the release of insulin. Insulin allows glucose to be taken up and used by insulin-dependent tissues, such as muscle cells.
Which phrase correctly defines a gene?
O a complete protein
a segment of DNA
a segment of a protein
a part of the cell membrane
Answer:
A segment of DNA
Explanation:
Genes are parts of DNA
A gene is a segment of the DNA (deoxyribonucleic acid). DNA is the genetic material of the cell which contains the information for the development of different characteristics in an organism. Thus, the correct option is B.
What is a Gene?
A gene is the basic unit of heredity in an organism. It can also be defined as the molecular gene which is a sequence of nucleotides in the DNA molecule that is transcribed to produce a functional RNA which synthesizes a protein. There are two main types of molecular genes which include protein-coding genes and the noncoding genes.
Protein-coding genes or exons are the regions in the DNA which encodes for the synthesis of protein and the non-coding genes or introns are the segments of the DNA which does not code for any protein and thus are spliced in the post-transcriptional mechanism.
Therefore, the correct option is B.
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Describe an experiment that would allow you to determine if it is warmer inside or outside the playhouse by using two similar cups filled with equal amounts of ice
The ice melts in the playhouse quickly is considered a warmer playhouse.
Place two cups of equal size and have equal amount of ice in the two separate playhouse in order to find out which playhouse is more warmer and which is less. Note the time and after sometime check the cups of ice in both playhouses.
That playhouse in which all the ice turns into water than the other one is considered warmer playhouse as compared to the other one because high temperature melts ice very quickly so we can conclude that the ice melts in the playhouse quickly is considered a warmer playhouse.
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Differences between bacteria and plants
Answer:
Main Difference – Plant Cell vs Bacterial Cell
The plant cell is a eukaryotic cell whereas the bacterial cell is a prokaryotic cell. The main difference between plant cell and bacterial cell is that plant cell contains membrane-bound organelles whereas bacterial cell lacks membrane-bound organelles.
Explanation:
can you me as brainliest if its right? i just need a few more to rank up! ^-^
Answer quick please
Answer:
Area 4
Explanation:
Im pretty sure
mark brainliest if correct pls
6. The number of penguins in the north pole has been decreasing steadily by 5% every year.
Last year there were estimated to be 235,000 left in the wild. How many are there going to be
this year if the trend continues.
Answer:
Explanation:
223,250 Penguins
Proteins are made on cell structures known as.…
Answer:
Ribosomes
Explanation:
Ribosomes are organelles made of ribosomal RNA (rRNA) and protein. They exist in the cytoplasm of the cell and are the site of protein synthesis in all cells. Ribosomes read the codons in mRNA and catalyze the creation of peptide bonds between the appropriate amino acids, forming polypeptide chains.
How might the release of heavy metals into the environment be factored into the costs of using coal as an energy source?
Answer: The release of heavy metal into the enviroment could possibly be dangerous becasue of pollution.
Explanation:
Pollution can harm some factories in which the energy could stop as the metals could mix into the coal and not continue with the process and could stop the production. Hope this was helpful!
The release of heavy metal into the environment could possibly be dangerous because of pollution be factored into the costs of using coal as an energy source
What are the types of energy ?The energy can be defined as ability to work or produce action and / or movement and manifests itself in many different ways, such as body movement, heat, electricity, etc.
The different types of energy include Kinetic energy which is associated with the movement of bodies. Potential energy which is stored by virtue of a body's position relative to its surface is also called gravitational potential energy.
Thermal Energy or Heat can be defined as the energy associated with the kinetic energy of the molecules that make up an element, it can be manifested if there is a temperature difference between two bodies.
Chemical energy released or formed from chemical reactions, Solar energy from sunlight. This form of energy is used to generate electricity through photovoltaic plates, for example.
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18.
Which of the following would be an example of an animal being in the lower limit
of tolerance?
a. A shark in warm water.
b. A bird in a tree that has everything it needs.
C. A frog being in water that is too cold to maintain homeostasis.
d. None of the above
Answer:
I think it would be A.