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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
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.
Using the __________ system, kingdoms are grouped based on cell structure and type, while the __________ system groups major taxonomic groups into three major domains.
Given what we know, we can confirm that using the using the Whitaker system, kingdoms are grouped based on cell structure and type, while the whoese-fox system groups major taxonomic groups into three major domains.
What is the Whitaker system?The Whitaker system is a classification system to order and organize the diverse biological life found on Earth. This is the most commonly-known system which orders organisms into the 5 kingdoms. What is the Whoese-fox system?This is a much less popular system of classification for biological life. It is considered to be much less specific, containing only 3 groupings.Therefore, we can confirm that based on the statement, the spaces missing correspond to the scientists for who the systems are named after, which are Whitaker and Whoese-fox.
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What type of species has an
impact on the ecosystem that is
greater than its numbers?
A. a keystone species
B. a non-native species
C. an invasive species
Answer:
I think it would be C
Explanation:
Invasive species can cause a lot of problems and have a big impact on the ecosystem.
Answer:
A
Explanation:
It is a keystone of species
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.
Salt water gargle can temporarily relieve a sore throat. One recipe calls for 3/4 teaspoon of salt in 1 cup of water. A second recipe calls for 1 teaspoon of salt in 2 cups of water. Which recipe will taste saltier?
Answer:
The first solution will, since the salt to water ratio contains more salt.
Explanation:
The salt will cause the recipe to taste saltier, since the salt is what makes things salty.
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 the weather after the passage of a cold front.
Answer:
As the cold front passes, winds become gusty. ... Atmospheric pressure changes from falling to rising at the front. After a cold front moves through your area, you may notice that the temperature is cooler, the rain has stopped, and the cumulus clouds are replaced by stratus and stratocumulus clouds or clear skies.
Explanation:
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:
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What type of molecule is represented by the model below?
Carbohydrate
Steroid
Fat
Nucleic acid
____ is the process in which light energy is transformed into food energy.
life
photosynthesis
abiotic
biotic
Option B: Photosynthesis.
Answer:
B
Explanation:
I did the test
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
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
Biochemists developed a compound that they hypothesize will disrupt the ability of the cells to organize centrioles and microtubules. This compound is applied to a group of onion root tip cells. What will serve as the best evidence that the biochemists' hypothesis about this compound is correct? Biochemists developed a compound that they hypothesize will disrupt the ability of the cells to organize centrioles and microtubules. This compound is applied to a group of onion root tip
In order to serve as evidence that the hypothesis put forward by the Biochemists is true, they will have to observe that the onion cells stop multiplying and the roots do not grow.
The primary function of microtubules and centrioles in a cell (or at least one that they have in common) is their participation in cellular division, that is, mitosis and the formation of a cytoskeleton.
Without the formation of these structures, the cell will a cytoskeleton and the ability to divide. Therefore, we can confirm that evidence of this hypothesis would be for the cells to lack these functions.
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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.
Where does carbon dioxide enter aplant
Answer:
through its leaves.
Explanation:
b) What is the name of the tube that connects the liver to the alimentary canal?
Answer:
Tube is a connected liver alimentary canal
Explanation:
Tube id miob
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.
Why Should We Add Crickets In Our School Lunches?
Introduction
Answer:
Because it is rich in Protein and also gross
Explanation:
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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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.
What 2 elements are abundant in nature but not in a readily available/usable form?
Nitrogen occurs in air as N2 which is not readily available to organisms.
Many elements occur in nature in various forms. Not all forms in which elements occur in nature are usable. Some forms in which elements occurs can not be used unless they undergo some kind of extraction and purification process.
Two elements are abundant in nature but not in a readily available/usable form are nitrogen and silicon. Nitrogen occurs in air as N2 which is not readily available to organisms. Silicon abundant in soil and is used in making glass but must be processed before it can be used.
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19. Which type of weathering is responsible for the green patina that forms on the copper skin of the Statue of Liberty
1.chemical
2.physical
3.dissolution
4.carbonization
Chemical weathering is mostly caused by water and the many chemical substances that are contained in it, copper skin of the Statue of Liberty is due to Chemical weathering, hence option 1 is correct.
What is Chemical weathering?One of the minerals that form rocks the most frequently chemically combines with water and other water-soluble substances to make clay.
Many weak acids, including carbonic acid, are present in water. Water, oxygen, and acids are the principal weathering agents in chemical reactions.
These interact with rocks on the surface to create new minerals that are stable in or in balance with the climatic and chemical conditions at the surface of the planet.
Therefore, the copper skin of the Statue of Liberty is due to Chemical weathering.
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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.
Which cell type would have the highest concentration of oxygen on a bright, sunny day?
Answer: The Pulmonary vein blood vessel carries oxygenated blood from the lungs back to the heart. Therefore, it carries the highest concentration of oxygen.
Explanation: i think is the answer not sure hope it help this question :)
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
How many genes are shared by all viruses?
Answer:
200 approximate
Explanation:
depends how many in common
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
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.
please help me i’ll give you brainlist
Answer:
B) Daughter Cells
Explanation:
When a cell divides, the parent cell divides to form two daughter cells.
Answer:
The answer is daughter cells.
Hope that helps. x