Answer:
C-None of these are found in an observational study
Explanation:
(A.) controlled variables are a part of what's found in a controlled experiment. (B.) manipulated variables are a part of what's found in a controlled experiment. (C.) Answer choice A. or Controlled variables, Answer choice B. or Manipulated variables, and Answer choice D. or Control groups are a part of what's found in a controlled experiment. (D.) Control groups are a part of what's found in a controlled experiment. Therefor this only leaves one answer and that answer is Like I said C-None of these are found in an observational study.
A molecule of
is shaped like a double helix, which
makes it look like a spiral staircase,
Answer:
DNA
Explanation:
dna has a double helix structure. making it look like a spiral staircase
Micheal wants to test the effect of stomach acid concentration on the solubility of a particular oral medication. Which experiment design setup would best help him answer his question?
Answer:
Prepare solutions of different acid concentrations, measure 50 milliliters of each into different beakers, and place the same type of medication of the same mass into the beaker
Explanation:
The experiment to test the effect of stomach acid concentration on the solubility of a particular oral medication will have the following configuration;
The independent variable = The concentration of the acid to which the medication is added
The dependent variable = The solubility of the medication in the acid concentration
The constant = The medication which is added to the acid concentration
The controls = The fixed mass and type of the particular medication and fixed volume of the different concentrations of the acid samples.
If an organism is made entirely of one cell it is called
The nervous system is composed of ______ or nerve cells
A receptors
B. neurons
C. neurotransmitters
D. axons
Answer:
B. Neurons
Explanation:
This is it
Answer:
Neurons
Explanation:
Basic units of the nervous system that receive, transmit, and integrate information.
in eukaryotic cells, dna replication occurs in the
Answer:
inside the nucleus
Explanation:
dna replication in eukaryotic cells occurs in the nucleus
6. List and describe 8 part of prokaryote cells.
Answer:
Prokaryotes explanation
Explanation:
Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. As organized in the Three Domain System, prokaryotes include bacteria and archaeans. Some prokaryotes, such as cyanobacteria, are photosynthetic organisms and are capable of photosynthesis.
Many prokaryotes are extremophiles and can live and thrive in various types of extreme environments including hydrothermal vents, hot springs, swamps, wetlands, and the guts of humans and animals (Helicobacter pylori).
Prokaryotic bacteria can be found almost anywhere and are part of the human microbiota. They live on your skin, in your body, and on everyday objects in your environment.
Prokaryotic Cell Structure
Bacterial Cell Structure
Bacterial Cell Anatomy and Internal Structure. Jack0m/Getty Images
Prokaryotic cells are not as complex as eukaryotic cells. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid.
Prokaryotic organisms have varying cell shapes. The most common bacteria shapes are spherical, rod-shaped, and spiral.
Using bacteria as our sample prokaryote, the following structures and organelles can be found in bacterial cells:
Capsule: Found in some bacterial cells, this additional outer covering protects the cell when it is engulfed by other organisms, assists in retaining moisture, and helps the cell adhere to surfaces and nutrients.
Cell Wall: The cell wall is an outer covering that protects the bacterial cell and gives it shape.
Cytoplasm: Cytoplasm is a gel-like substance composed mainly of water that also contains enzymes, salts, cell components, and various organic molecules.
Cell Membrane or Plasma Membrane: The cell membrane surrounds the cell's cytoplasm and regulates the flow of substances in and out of the cell.
Pili (Pilus singular): Hair-like structures on the surface of the cell that attach to other bacterial cells. Shorter pili called fimbriae help bacteria attach to surfaces.
Flagella: Flagella are long, whip-like protrusions that aid in cellular locomotion.
Ribosomes: Ribosomes are cell structures responsible for protein production.
Plasmids: Plasmids are gene-carrying, circular DNA structures that are not involved in reproduction.
Nucleoid Region: Area of the cytoplasm that contains the single bacterial DNA molecule.
Prokaryotic cells lack organelles found in eukaryoitic cells such as mitochondria, endoplasmic reticuli, and Golgi complexes. According to the Endosymbiotic Theory, eukaryotic organelles are thought to have evolved from prokaryotic cells living in endosymbiotic relationships with one another.
Like plant cells, bacteria have a cell wall. Some bacteria also have a polysaccharide capsule layer surrounding the cell wall. This is the layer where bacteria produce biofilm, a slimy substance that helps bacterial colonies adhere to surfaces and to each other for protection against antibiotics, chemicals, and other hazardous substances.
Similar to plants and algae, some prokaryotes also have photosynthetic pigments. These light-absorbing pigments enable photosynthetic bacteria to obtain nutrition from light.
Binary Fission
E. coli Bacterium Binary Fission.
E. coli bacteria undergoing binary fission. The cell wall is dividing resulting in the formation of two cells. Janice Carr/CDC
Most prokaryotes reproduce asexually through a process called binary fission. During binary fission, the single DNA molecule replicates and the original cell is divided into two identical cells.
Steps of Binary Fission
Binary fission begins with DNA replication of the single DNA molecule. Both copies of DNA attach to the cell membrane.
Next, the cell membrane begins to grow between the two DNA molecules. Once the bacterium just about doubles its original size, the cell membrane begins to pinch inward.
A cell wall then forms between the two DNA molecules dividing the original cell into two identical daughter cells.
Although E.coli and other bacteria most commonly reproduce by binary fission, this mode of reproduction does not produce genetic variation within the organism.
Prokaryotic Recombination
Bacterial Conjugation
False-color transmission electron micrograph (TEM) of an Escherichia coli bacterium (bottom right) conjugating with two other E.coli bacteria. The tubes connecting the bacteria are pili, which are used to transfer genetic material between bacteria. DR L. CARO/Science Photo Library/Getty Images
Genetic variation within prokaryotic organisms is accomplished through recombination. In recombination, genes from one prokaryote are incorporated into the genome of another prokaryote.
Recombination is accomplished in bacterial reproduction by the processes of conjugation, transformation, or transduction.
Capsule, cell wall, cell membrane, pilus, flagella, ribosomes, nucleoid, and plasmids are the parts of prokaryotic cells.
What are the parts of prokaryotic cells?Single-celled creatures known as prokaryotes are the earliest and most basic living forms on Earth. Bacteria and archaeans are prokaryotes, which are classified according to the Three Domain System. Some prokaryotes are photosynthetic creatures and can do photosynthesis, such as cyanobacteria.
Prokaryotic bacteria are ubiquitous and comprise a significant portion of the human microbiome. They exist on your skin, inside your body, and on commonplace items in your surroundings.
Bacteria, as a sample prokaryote, its cells have the following organelles and structures:
Capsule: Found in some bacterial cells, this extra outer layer aids in moisture retention, prevents the cell from being swallowed by other organisms, and aids the cell's adherence to surfaces and nutrients.Cell Wall: The bacterial cell's cell wall serves as both a protective barrier and a structural component.The cell membrane: also known as the plasma membrane, protects the cytoplasm of the cell and controls how substances enter and exit the cell.Pili (Pilus singular): Surface-mounted, hair-like structures that connect to other bacterial cells. Fimbriae, which have shorter pili, aid bacterial attachment to surfaces.Flagella: Long, whip-like protrusions called flagella assist cells in moving about.Ribosomes: Ribosomes are the parts of cells that make proteins.Nucleoid: They are the part of the cytoplasmic region that carries a single molecule of bacterial DNA.Cytoplasm: Cytoplasm is an organic material that resembles a gel and is mostly made of water. It also includes enzymes, salts, and numerous cell components.Therefore, the capsule, cell wall, cell membrane, pilus, flagella, ribosomes, nucleoid, and plasmids are the parts of the prokaryotic cells.
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Joint movement occurs on an axis that is always ____ to its plane
Answer: Perpendicular
Explanation:
Joint movement: This is a movement which occurs around an axis that is always perpendicular to its plane. This can also be defined a movement which usually occurs or happens in a plane and around an axis. perpendicular is used to describe the meeting angle which is usually ( 90 degrees) to the ground.
Can you help me with the question listed in the pictures below? Please and thank you. Will mark BRAINLIEST!!!
Living your best life is honestly up to your own interpretation.
Living your best life is what YOU think is best for yourself.
Here’s what I think it means:
Living your best life means living a life where there are no boundaries and you are free to do what you want. Doing what I want in the future will make me happy. Happiness will give me my best life.
How might my views
about the natural
world be influenced by
the results
of scientific
investigation?
Which is an example of genetic engineering?
Answer:
the insulin
Explanation:
first we take the gene from human cells and we mix them together with bacterial dna.we place them in a fermentation vessel where it will then multiply. then it create the insulin which we use it for people who suffer from diabete.
(sorry im not that good in englisht)
4. Golden shiner and mud minnows lay their eggs on Chara. In which pond would you find them?
Answer:
If there are answers like A) B) or C)
Explanation:
It would be pond C
Hope that helps! ^^
Answer:
Pond A
Explanation:
Pond A: Cattails, bulrushes, and water lilies grow in the pond.
Which distance is the greatest
Answer:
you have to be more specific we don't know what you are talking about.
Explanation:
what is the food you eat used for
Answer:
This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach. When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose.
Explanation:
Which statement best contrasts the urinary and excretory systems?
The urinary system is involuntary, while the excretory system is voluntary.
The urinary system includes the bladder, while the excretory system does not.
The urinary system filters waste for nutrients, while the excretory system has no filter.
The urinary system removes liquid waste, while the excretory system removes solid waste.
Answer:
The urinary system removes liquid waste, while the excretory system removes solid waste.
Explanation:
just got it right
Question 3 About how long does it take the Moon to make one trip around the Earth? a) week b) year c) month d) day
Answer:
C) month
Explanation:
it takes around 27 days, so rounded that would be about a month
HELPPPPPPPPP Can you give me examples of marcomolecule
Answer:
proteins, carbohydrates, lipids and nucleic acids. thank me later
Answer:
proteins, carbohydrates, lipids and nucleic acids
Explanation: hope to get a Brainliest!
hope u have a good day! :)
Which is a compound?
nitrogen gas
carbon dioxide gas
oxygen gas
hydrogen gas
Answer: B. Carbon Dioxide Gas
Explanation:
Carbon Dioxide is a compound. So, the correct option is (B).
What is Compound?A chemical compound is defined as a chemical substance made up of many identical molecules consisting of atoms of more than one chemical element held together by chemical bonds. These molecules contain atoms of only one element which are not compounds.
Compound is the substance which is made from two or more different elements joined chemically.
Examples of compounds are
1. Water [tex](H_2O)[/tex],
It is made from the elements hydrogen and oxygen
2. Table salt (NaCl)
It is made from the elements sodium and chloride.
3. Carbon Dioxide [tex](CO_2)[/tex]
It is made from the elements Carbon and Oxygen.
There are three types of compounds:
Closed CompoundsHyphenated CompoundsOpen CompoundsThus, Carbon Dioxide is a compound. So, the correct option is (B).
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What is the main part of the cell membrane?
Answer:
I'm not sure but I think is genes
What is an atom’s atomic number? the number of electrons in an atom the number of neutrons in an atom the number of protons in an atom the number of bonds in an atom
Answer:the number of electrons in an atom the number of neutrons in an atom the number of protons in an atom the number of bonds in an atom
Explanation:
Answer:
the number of protons in an atom
Explanation:
edge2020
In an effort to relax after a stress-filled week, Joanne has a couple of glasses of wine, and her co-worker Jim takes a Valium. Both alcohol and Valium work by increasing the activity of the neurotransmitter which inhibits action potentials and slows brain activity.
is a actinosphaerium autotroph or heterotroph?
Answer:
Nutrition autotrophs ingestive heterotrophs absorptive heterotrophs mixotrophs movement flagella cilia pseudopods non-motile.
Explanation:
Hope this helped :)
Hysterically Synonyms and Antonym meaning
Synonyms for "hysterically" include:
FranticallyWildlyManicallyMadlyFrenziedlyUncontrollablyChaoticallyAntonyms for "hysterically" include:
CalmlySerenelyComposedlyTranquillyRationallyStoicallyPeacefullySynonyms are words or phrases that denote the same thing in a similar way as another word or words. They are often employed to diversify writing or to use different words to communicate a notion or idea. Antonyms are words that have the exact opposite meaning of another word. They provide contrast or convey the opposite meaning of a word.
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Of the following statements, select all (2) that are true.
Answer:
First one and third one
Explanation:
I just did it and got it right hope this helped
If maggots were spontaneously being produced by meat, then??? A) meat in sealed jar would have maggots B) meat in the open jar would have maggots C) meat in both jars would have maggots
Answer:
C
Explanation:
The correct answer would be meat in both jars would have maggots.
If maggots were spontaneously being produced by meat, both of the meat in a sealed and opened jar would have maggots in them. A spontaneous process would happen without any external force. Hence, whether the jar is sealed or otherwise, the spontaneous appearance of maggots in a jar with meat would still happen.
The correct option is C.
You have planted corn in a field with clay soil. The field is predominantly flat with a slight slope at one end where a creek borders the field. You notice that germination and growth is slowest in the flattest portion of the field. Conversely, you also notice that you received good germination and rapid growth on the slight hill which meets the creek. You wonder why there should be differences in growth and germination in different parts of the field. Is it due to the extra water near the creek? Is there something different about the soil in that portion of the field, or is it due to the difference in slope (north, south, east, and west). 1. What is your hypothesis for this problem? 2. Design an experiment to test the hypothesis you have written (make sure you include a procedure [step by step list of what you will do], an IV, a DV, treatments, trials, and constants).
Hypothesis: The soil in the flat part of the field has less fertility than the soil on the small hill.
Experiment:
The experiment will be carried out in a greenhouse, to promote a controlled environment and equal to all plants used in the treatment.
In this experiment, the influence of the difference in fertility of the soil samples, in the flat part of the land and in the most inclined part, in the germination and growth of corn plants will be tested.
Corn seeds of the same species will be selected. All seeds will be sanitized and will go through the same dormancy breaking process, so that all of them have their germination stimulated.
Vessels with a capacity of 30 kilos will be caught. These pots will be cleaned, sterilized and filled with the same amount of soil collected in the field and with two corn seeds. It will be used 10 pots with soil that was collected in the flat part of the land, 10 pots with soil from the sloping part of the land and 10 pots with fertilized substrate containing high levels of fertility.
The pots will be placed in a greenhouse and will be irrigated with distilled water, to avoid contamination by possible substances in the water.
The pots will remain in the greenhouse for 100 days, where the behavior of seeds and plants in each of them will be observed and noted. After this period, a comparison will be made between the vessels of each treatment, assessing the differences between them and reaching the conclusion whether the hypothesis is true or false.
Hypothesis: The soil in the flat part of the field has less fertility than the soil on the small hill.
Experiment:
The experiment will be carried out in a greenhouse , to promote a controlled environment and equal to all plants used in the treatment.
Procedure:
In this experiment, the influence of the difference in fertility of the soil samples, in the flat part of the land and in the most inclined part, in the germination and growth of corn plants will be tested.Corn seeds of the same species will be selected. We will choose containers with more capacity. These pots will be cleaned, sterilized and filled with the same amount of soil collected in the field and with two corn seeds. It will be used 10 pots with soil that was collected in the flat part of the land, 10 pots with soil from the sloping part of the land and 10 pots with fertilized substrate containing high levels of fertility.These pots will then be placed in a greenhouse and will be irrigated with distilled water, to avoid contamination by possible substances in the water.The pots will remain in the greenhouse for 100 days, where the behavior of seeds and plants in each of them will be observed and noted.Thus after this experiment we can conclude that whether hypothesis matches with the experiment.
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Question 5 (1 point)
Identify the independent variable: Two plants were grown in two different brands of potting soil, they received the same amount of
sunlight and water.
a
b
The plants
The sunlight
The water
The potting soil
С
Od
ANSWER BOTH QUESTIONS PLEASE AND THANK YOU.
Is unicellular eukaryotic or prokaryotic
Answer:
It's Eukaryotic
Explanation:
Out of the three physical states: ice, liquid water and vapor, why do you think water exists as a liquid the most o n our planet?
I think it is because of the temperature of the earth.
If ice was the most common physical state on our earth it would be because of how cold it would be. Other way around with vapor.
Cell division by meiosis of a parent cell with 23 pairs of chromosomes will result in...
A) 2 cells, each with 23 single chromosomes.
B) 4 cells, each with 23 single chromosomes.
Answer:
option A is the right answer
hope this helped you
please mark as the brainliest (ㆁωㆁ)
Meiosis is a type of cell division that occurs in cells and this division results in a reduction in the number of parent cells by half.
A parent cell with 23 pairs of chromosomes (46 chromosomes) undergoing meiosis will result in the production of 4 cells each with 23 single chromosomes.
In meiosis, a beginning cell with 23 pairs of chromosomes (after duplication) will go through the first division separating all homologous chromosomes and giving rise to two cells with 23 chromosomes each with its own two sister chromatids.
During the second division, each of the two daughter cells produced divides and the chromosomes separate at the centromeres, with each chromatid moving to opposite pole, so four daughter cells is produced and contains 23 single chromatids/chromosomes.
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