Answer:
When a polar substance is put in water, the positive ends of its molecules are attracted to the negative ends of the water molecules, and vice versa
Explanation:
id if this helped but
Leigh investigates the color of shells deposited on a beach as she walks along the coastline. She wants to know whether this variation in color is due to chance or if it is significant. Data was collected over a minimum 20 cm long region at four sites along the beach coast. Shells were categorized into four different shades, 1 being the lightest and 4 being the darkest. What is the mean number of shells collected?
Answer:
the data is QUANTITAVE because it includes data that are NUMBERS a CHI-SQUARE will be used ...
Explanation:
right on edge for ap bio
Answer:
slide 4 is 4.79
Explanation:
correct on ap bio edge 2021
How do macrophages fight pathogens?
Answer:
They release antibodies to protect the body. They produce antigens to protect the body. They break down the pathogens that enter the body. They respond to a future invasion of the same type of pathogen.
Explanation:
hope i helped?? :))
<3
- pun
Answer:
With Acid
Explanation:
The first line of immune defense against invading pathogens like bacteria are macrophages, immune cells that engulf every foreign object that crosses their way. After enclosing it in intracellular membrane vesicles, a process called phagocytosis, macrophages kill their prey with acid.
Which organelle transports material throughout the cell?
Cell Membrane
O Endoplasmic Reticulum
O Mitochdadria
O Lysosome
o
Answer:
lysosome I think.
Explanation:
Where does photosynthesis happen the fastest and the slowest?
Answer: It's basically fastest when white light hits and when yellow, red and green light hits it's at its lowest
Explanation: i hope this helped
Where is the spine ? i want the answer
Answer:
in your back
Explanation:
Answer/Explanation:
The spine is located in the person's back. It is right along the midline and is split in half when looking at the sagittal plane. Although some people have spinal issues which can cause it to be dislocated.
Hope that helps and have a great day!
What is used to select the entire table
Answer:
Select an entire table using a keyboard. To select an entire table using a keyboard, position the cursor in the first cell of the table. Press Alt + Shift + End on your keyboard to select to the end of the first row and then press Alt + Shift + Page Down to select to the last cell.
Name a pH level that amylase and
alkaline phosphatase share?
where does the word atom come from
Answer:
greek word atomos which means invisible a- means not and -tomos means cut
Explanation:
Explanation:
Greek philosophers such as Democritus and Epicurus suggested that matter is made up of tiny indivisible particles called atoms. The word atom is derived from the Greek word atomos, which means indivisible or uncut.
Is bacteria the smallest living thing on earth
Answer:
Image result for Is bacteria the smallest living thing on earth
Mycoplasma genitalium, a parasitic bacterium which lives in the primate bladder, waste disposal organs, genital, and respiratory tracts, is thought to be the smallest known organism capable of independent growth and reproduction.
Explanation: hope this helped
6. Alex wanted to find out what toothpaste made teeth the cleanest. Everyday she brushed her teeth with a different product and then took a plaque test to see how much plaque was left. She used Crest, Colgate, Close-up, and water. a. Independent Variable (IV): ______________________________________________ b. Dependent Variable (DV): ______________________________________________ c. Control: _____________________________________________________________ d. Constants:__________________
Answer:
Independent variable: Different products of toothpaste
Dependent variable: Amount of plaque left in her teeth
Control group: Water
Constant: Same amount of time for product to have an effect
Explanation:
Independent variable is the variable that is subject to manipulation or change by the experimenter in order to effect a measurable response. The independent variable in this experiment is the DIFFERENT PRODUCTS OF TOOTHPASTE USED.
The dependent variable is the variable that is measured during the experiment. In this experiment, the dependent variable is the AMOUNT OF PLAQUE LEFT IN ALEX'S TEETH.
The control group in an experiment is the group that does not receive the treatment/independent variable. In this case, the usage of WATER is the control.
The constant is the variable kept the same for all the groups in the experiment. In the case, the Same amount of time for each product to have an effect on her teeth is the CONSTANT.
How many meters per hour did marica run?
how many meters per hour did marica run ? 12,600
Which of the following is(are) true about ribosomes? Select all that apply. They are found free floating in the cytoplasm. They are the site of production of carbohydrates. They are found on the surface of the smooth endoplasmic reticulum. They are the site of protein synthesis.
They are found free floating in the cytoplasm & They are the site of protein synthesis
How do consumers use the sun to get their energy?
list 3 pros to cow calf operation
Answer:
1. Profits
2. Forage is cheaper than feed
3. low death loss
HELP ME
A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in
4,000 years?
8,000 meters south
04.000 meters south
O 200 meters south
O 80 meters south
Answer:
8,000 meters south
Explanation:
2 times 4,000
Answer:
80 meters
Explanation:
2cm per year would be 8000 cm in 4000 yearsconvert 8000 cm to meters there are 100cm in a meterso 8000 cm is equal to 80 metersA scientist conducted one trial of experiment and got unexpected results. How can the scientist increase confidence in the results? A). by repeating the experiment several times B). by charging the experimental procedure C). by asking other scientists what they think about the results D). by modifying the results so they are close to the expected results
Answer:
The answer is A by repeating the experiment several times
Explanation:
i did it on edu
By repeating an experiment many times, scientists increase confidence in the results. So, the correct option is (A).
What is an experiment?An experiment is defined as a procedure which is carried out to support or disprove a hypothesis. It determines the efficacy or potential of something previously unusable. It provides insight into cause and effect by demonstrating what results when a particular factor is manipulated.
An experiment is defined as a type of empirical study that involves manipulation of an independent variable, measurement of a dependent variable, and control of extraneous variables. This extraneous variable is any variable other than the independent and dependent variables.
The best approach when conducting a scientific experiment is to test repeatedly and make sure the experiment can be repeated.
Thus, by repeating an experiment many times, scientists increase confidence in the results. So, the correct option is (A).
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A very thin slice is removed from a peanut and treated with Sudan III, another indicator that turns red in the presence of a lipid. Then the same slice is treated with Biurets reagent. When the peanut is examined under a microscope, little patches of red and blue-violet can be seen. What conclusions can be drawn from this examination? Why would you expect this result?
Answer:
Little patches
Explanation:
blue- violet
Little patches and blue- violet.
What is Little patches?Sudan III is a bis(azo) chemical that has a 4-[(2 methylphenyl)diazenyl]phenyldiazenyl group replaced at position 1 of the 2-naphthol ring. a fat-soluble dye that can stain some protein-bound lipids in paraffin sections and is mostly used to show triglycerides in frozen sections.
It functions as a histology dye, a fluorochrome, and a carcinogen. It belongs to the class of azobenzenes, is a bis(azo) chemical, and is a naphthol. It is similar to a 2-naphthol in terms of function.
"It certainly does not mean, as many writers have assumed, that the lipid in question belongs to the carbohydrate-containing glycolipid (cerebroside) group.
Therefore, Little patches and blue- violet.
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Coastal wetlands are ecologically important because they do all of which of the following a. reduce the impact of storms coming inland b. harbor a low level of biodiversity c. help to destroy nutrients d. provide important habitats for only terrestrial species e. repel large aquatic reptiles
Answer: The answer is e
Explanation:
where does a photosystem occur in a plant cell
Answer:
thylakoid membrane
Explanation:
yes
Which best describes the relationship between temperature and dissolved oxygen in a lake?
As temperature increases, dissolved oxygen increases.
As temperature increases, dissolved oxygen decreases.
As temperature decreases, dissolved oxygen decreases.
A change in temperature has no
effect on dissolved oxygen.
Explanation:
Air and Water Temperature Increases
For example, increases in water temperatures are expected to result in the following: Lower levels of dissolved oxygen due to the inverse relationship that exists between dissolved oxygen and temperature. As the temperature of the water increases, dissolved oxygen levels decrease.
5. Explain why a washing machine would be considered technology.
Answer:
It's technology because it does a certain service for you with less time wasted if you did it by hand.
Explanation:
why must a scientific explanation be supported by data
Answer:
Supporting a scientific inquiry with data helps reduce the bias opinion that's humans have.
How do decomposers obtain their food?
A. hunting and killing prey for food
B. changing carbon dioxide and water
into food
C. absorbing food from dead organisms
D. producing food from oxygen and
sunlight
Answer:
C. absorbing food from dead organisms
Explanation:
forensic odontologists might be involved in which of the following circumstances?
a: a femur bone is found in a field
b: a victim has a bite on his arm
c: a profile of a suspect is needed
d: beetles are collected from a decomposed body
Answer:
A victim has a bite on his arm
Explanation:
took the test and got it right
Ultimately, all scientific knowledge comes from:
Select one
a. textbooks
O b. experimentation
O c. experimentation & observation
O d. observation
Ultimately, all scientific knowledge comes from:
Select one
O a. textbooks
O b. experimentation
O c. experimentation & observation ✓✓✓
O d. observation
Ultimately, all scientific knowledge comes from experimentation and observation (Option c).
What are experimentation and observation?Experimentation and observation are procedures used in the scientific method to validate hypotheses.
The experimental and observational procedures can also be used to reject my working hypothesis.In conclusion, ultimately, all scientific knowledge comes from experimentation and observation (Option c).
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The main focus of conservation is to
a. wisely manage natural resources for people's use
b. set aside land and protect it from human activities
c. demand government action to pass environmental laws
d. prevent wild species from becoming endangered
e. limit society's demand for natural resources
Answer:
A.) Wisely manage natural resources for people's use
Explanation:
Because conservation is like preservation but conservation wants to seek sustainable use of nature by humans for activities such as, hunting, logging, and even mining.
Which one of the following is true of the structures labeled D in the cell membrane?A.They are membrane proteins.B.They are hydrophilic.CThey are carbohydrates.D.They are hydrophobic?
The structure labelled D in the cell membrane is hydrophilic in nature. That is option D.
What is phospholipid bilayer?Phospholipid bilayer is defined as the part of the cell membrane that is made up of two phospholipid layers which include:
Hydrophobic layer: The interior which is water hatingHydrophilic layer: The exterior that is water loving.Therefore, from the diagram, the structure labelled D is the interior part of the phospholipid bilayer which is hydrophilic in nature.
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Need help emt class
Answer:
3.
ExplaA bilateral hip replacement, for instance, replaces both hip bones in the same operation.
4. The immune system
marks me as brainiest.
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After researching the rock they found, Mary and Jim believe it contains large pieces of the mineral limonite. They observed that their rock was yellow in color. And, according to the data they gathered, limonite is also yellow. They plan to conduct an investigation using the scientific method. Part A What is Mary and Jim’s hypothesis?
The definition of a hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. therefore this means that there hypothesis is that the stone is limonite because limonite is also yellow.
what are several defenses that keep pathogens from getting inside the body
Answer:
The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.