what type of experiment is an obsevational study?

Answers

Answer 1

Answer:

onsider someone on the busy street of a New York neighborhood asking random people that pass by how many pets they have, then taking this data and using it to decide if there should be more pet food stores in that areac

Explanation:

I googled it!! (study.com)


Related Questions

What is true about the most recent ice age?
O A. All life on Earth became extinct.
O B. It occurred during the Precambrian era.
O C. Sea levels rose over 300 feet.
D. Land bridges existed that are now underwater.

Answers

The truth about the last ice age: D. There was now a submerged overpass.

An ice age also called an ice age, is a geological period in which thick ice sheets cover vast land areas. These massive ice ages could last for millions of years and could radically change the surface topography of entire continents.

There have been several major ice ages in Earth's history. The amount of sunlight reaching Earth over thousands of years varies considerably, especially at the North Pole and its surrounding northern latitudes. When less sunlight reaches northern latitudes, temperatures drop, more water freezes into ice, and the Ice Age begins. This ice age began about 2.6 million years ago in a period known as the Pleistocene epoch and lasted until about 11,000 years ago. Like everything else, the Last Ice Age brought about a series of glacial advances and retreats. In fact, we are technically still in the Ice Age.

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In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result?

The chances for survival of the population are reduced. New food sources are discovered and become the regular diet. Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce. The environment adapts by providing more resources to the growing population, increasing the chances of survival for individuals within the habitat.

Answers

Answer:

Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce.

Answer:

Answer:

Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce.

Explanation:

What can a person do to limit exposure to X-rays?

Answers

Distance and shielding can protect a person from X Ray radiation. An example could be how X Ray technicians go into a room that’s away from you whenever you get an x ray at a hospital. Distance is effective because it can reduce exposure. Hope this helped!

Answer:

To limits exposure of X-rays, One can do the following things:

1) Use a  protective shield through which X-Rays can't pass.

2) Prevent X-rays as much as u can.

3) Don't go to places where you doubt the presence of X-Ray Radiations.

4) If not needed, Don't do CT scan.

Which organelles are found only in plant cells and not in animal cells?

Answers

Answer:

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Both plant and animal cells have a cytoplasm, cell membrane, mitochondria, nucleus, ribosomes and chromosomes.

which question is most closely related to the field of biology? what is the nearest planet to earth? How many planets are there in the solar system? What is the cause of cancer in mice? How do you design a cheaper automobile?

Answers

the most closely related question to biology is what is the cause of cancer in mice and the answer is simian virus

How many planets are there in the solar system? What is the cause of cancer in mice? This question is most closely related to the field of biology.

Define the field of biology?

Biology is a branch of science that deals with living organisms and their vital processes. Biology encompasses diverse fields, including botany, conservation, ecology, evolution, genetics, marine biology, medicine, microbiology, molecular biology, physiology, and zoology.

Is biology a good career?

Biology is a well-respected degree choice and offers the chance to get up close and personal with all matters of human, animal, and cell life. Biology degrees contain a wide variety of modules, ensuring that you can study something that really interests you and making it a good choice for keen scientists.

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Which organism would be classified as an arthropod? crab starfish snail earthworm

Answers

Answer: Crab, because an arthropod has no spine but an external skeleton.

Why do droughts contribute to desertification?​

Answers

Answer:

Drought and desertification are firmly related phenomenon. Continuing over months or years, drought can influence enormous zones and may have genuine ecological, social and financial effects.

While drought is a characteristic phenomenon, whose effects can be exacerbated by human exercises that are not adjusted to the neighborhood atmosphere, land debasement is the way toward transforming fruitful land into less or non-gainful land. In extraordinary cases in drylands this is called desertification.

Land debasement and desertification are complex phenomenon driven by un-adjusted human action in mix with land and climatic requirements. Improper land use, for example, monocultures, and unreasonable land the board rehearses, for example, deforestation, unsatisfactory agrarian practices and overexploitation of water assets), can cause land debasement that can be additionally disturbed by drought.

The fuel for nuclear power plants comes from

Answers

Answer:

Most nuclear reactors are fueled with a compound known as uranium dioxide. This uranium dioxide is put together in a fuel assembly and inserted into the nuclear reactor—where it can stay for several months or up to a few years. While in the reactor the fuel undergoes nuclear fission and releases energy

Explanation:

Answer:

Uranium is the most widely used fuel by nuclear power plants for nuclear fission. Nuclear power plants use a certain type of uranium—U-235—as fuel because its atoms are easily split apart. Although uranium is about 100 times more common than silver, U-235 is relatively rare at just over 0.7% of natural uranium.

The governments of many countries have regulations that are designed to prevent the accidental introduction of nonnative insects into their countries. This is because, in these new habitats, the nonnative insects might

Answers

Answer:

Take over

Explanation:

Nonnative species generally come over to a new area and don't have any natural predators. When this happens, they overpopulate and push out native species. This happens in plants, fish, insects, and mammals. Nonnative insects can also carry diseases (mosquitos with malaria and dengue fever)

During a routine physical exam of a child, the nurse notes an abdominal mass, elevated blood pressure and hematuria. The parents report abdominal pain, fatigue and recent fevers. Which lab value would prompt immediate further investigation and intervention?

Answers

Answer:

The signs that indicate immediate intervention would be a constant body temperature greater than 39 degrees, a decrease in blood pressure and heart rate, a decline, difficulty breathing, loss of consciousness.

If the chest pain increases, and the transaminase values also (liver evaluation) are also considered to be risk signs.

Explanation:

All these risk signs would be potentially lethal for the child but much faster than an adult, since it was found that children trigger acute lethal symptoms in less time, which is why the treatment should be done quickly and if possible As invasive as possible to reverse the picture.

Explain how a close relative of an African plant came to be living in the tropical pacific?

Answers

Continental drift.

Africa and the rest of the continents were once connected, creating a super continent called Pangea. Africa sat right above parts of South America so they had similar weather conditions and life forms. However, continental drift happened it led to the continents being split apart, separate the organisms on it.

I hope this helps.

Differences in blood flow during embryo development mean that identical twins (i.e. monozygotic) will develop different
a. Eye colors

b. Fingerprints c

. Blood types d.

Sexes

e. Hair colours

I can't seem to find a definite answer online, does anyone know what this is?

Answers

Answer:

The answer is D(sexes)

Explanation:

This is because monozygotic twins are genetically nearly identical and they are always the same sex unless there has been a mutation during development.

-5. Passive immunity involves introduction of weakened or dead pathogens
in to the body which stimulates the body to produce its own antibodies
True or false?

Answers

Explanation:

answer is T....only 4 certain ailments, like your bro., had chickenpox, then you got sick..or u get your shots when u are a baby...

What does a seed contain? a plant embryo and pollen grains the female reproductive organs a plant embryo and stored food the male reproductive organs

Answers

Answer:

A plant embryo and stored food

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sketch and label a eukaryotic cell for animal and plant

Answers

Answer:

Here is a diagram of eukaryotic cells! hope it helps

Explanation:

Which process produces two copies of the original DNA molecule?
O A. DNA ligation
B. DNA transcription
C. DNA translation
O D. DNA replication
SUBMIT

Answers

Answer:

The answer is option D.

DNA replication

Hope this helps you

2 Points
Which would be an adaptation in a very cold place, but not in a rainforest?
A. Special veins that keep you cool
B. Leaves for flying faster
C. Strong teeth for fighting competitors
D. Fur that blends in with snow

Answers

Answer: D

Explanation:

The adaptation that would be in a very cold place, but not in a rainforest, is fur that blends in with snow. The correct option is D.

What is adaptation?

Adaptation is a long-term or short-term change or modification of the body to survive and match the environmental conditions. Adaptation is necessary for every organism to increase its population.

Adaptation is categorized into different types according to the places where animals and plants live. Examples of adaptation are desert plants having thick leaves or no leaves to save water, and snow animals being white to blend in.

The animals living in very cold regions, like the arctic and Antarctica, have white fur to blend with the environment and save from predators.

Thus, the correct option is D. Fur, which blends in with snow.

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Write a hypothesis about the effect of the red light on the population. Use the "if . . . Then . . . Because . . ." format, and be sure to answer the lesson question: "How does natural selection change the phenotypes within a population over time?"

Answers

Answer:

Sample Response: If the color of the light in the environment changes, then the number of light red kidney beans increases because the red light makes the light red kidney beans more difficult to see.

Explanation:

its jus the sample response. its not gonna be wrong if the assignment made it itself lol

Answer:

The "if" part of the hypothesis refers to the environmental change.

The "then" part of the hypothesis refers to the phenotype variations.

The "because" part of the hypothesis connects the phenotype variations to the environmental change.

Explanation:

it's the other sample response so it won't be wrong

Determine whether the given procedure results in a binomial distribution​ (or a distribution that can be treated as​ binomial). If the procedure is not​ binomial, identify at least one requirement that is not satisfied. The YSORT method of gender​ selection, developed by the Genetics​ & IVF​ Institute, was designed to increase the likelihood that a baby will be a boy. When 150 couples use the YSORT method and give birth to 150 ​babies, the genders of the babies are recorded. Does the procedure represent a binomial​ distribution? A. ​No, because there are more than two categories for each trial. B. ​No, because the trials of the procedure are not independent. C. ​Yes, because the procedure satisfies all the criteria for a binomial distribution. D. ​No, because the probability of success differs from trial to trial.

Answers

Answer:

The correct answer is  C)

Explanation:

The number of couples who used YSORT method  (x) =  150That is, the number of couples who used YSORT method is limited or defined or definite.The probability of giving birth to a boy, for each couple is 1/2 or 0.5The gender of the baby born in each case mutually exclusive (Independent)

We can conclude that the procedure results in a binomial distribution because the assumptions of the binomial distribution are met.

Cheers!

Which describes absorption?

Answers

Answer:

Absorption. Absorption, in general sense, is the act or process of absorbing or assimilating. In biology, absorption pertains particularly to the process of absorbing or assimilating substances into the cell or across the tissues and organs. It is done through diffusion or osmosis.

Explanation:

Answer:

A sponge

Explanation:

Because when the sponge is applied pressure around water, or air, the pressure from around the sponge sucks back into the sponge making the sponge fluffed or wet if put in water.

Proteins in the cell membrane have many functions. Which type of protein would be able to transport materials in or out of the cell, and signal other cells? A. Integral proteins B. Glycoproteins C. Pore proteins D. Endoplasmic proteins

Answers

Answer:Integral proteins

Explanation: according to a video lesson in Founder Education

Integral proteins present in the cell membrane help in the transportation of materials and the signaling of other cells.

What are integral proteins and their functions?Integral proteins are the proteins attached permanently to the plasma membrane and are embedded in the whole layer of the membrane.They are also known as intrinsic proteins.

Functions of intrinsic proteins:Transportation: Hydrophilic compounds may be able to get through the cell membrane due to intrinsic proteins.Signal transduction: A binding site may be present in certain membrane proteins. These binding sites have distinctive structures that closely resemble those of chemical messengers. A receptor membrane protein that is placed inside the cell wall will link with a hormone when it comes into contact with the cell wall. Depending on the type of hormone or other chemicals, the hormone can alter the receptor protein and induce a certain reaction to occur inside the cell.

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Question 8 of 10
In what way does the nervous system connect to the skeletomuscular
system?
A. The nervous system provides oxygen to the muscles.
B. The nervous system holds the myosin and actin together.
C. The nervous system provides the calcium ions for contraction.
D. The nervous system sends signals to make muscles move.
SUBMIT

Answers

Answer: C. The nervous system sends signals to make muscles move

Explanation:make sure to like and rate.

Sodium is transported out of a cell through a transport protein from an area of lower concentration to an area of higher concentration with the use of ATP. Which type of membrane transport is involved in this process?

Answers

Active transport through a channel protein that is open when ATP attaches and is hydrolyzed to ADP.

why is rna shorter than DNA?

Answers

Answer:

RNA is much shorter than DNA. DNA contains the code for making lots and lots of different proteins as well as DNA contains all the genetic in formation of the body whereas RNA does not contains

Explanation:

i hope this will help you :)

3. The normal breaths per minute for a person is called _________________ of that person.

Answers

Answer:

Respiratory rate of that person.

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A football hits the ground and an apple hangs from a tree.
Which statement is correct?
Both football and apple have kinetic energy.
Both football and apple have potential energy.
The football has potential energy and the apple has kinetic energy.
The football has kinetic energy and the apple has potential energy.

Answers

Answer:

The football has kinetic energy and the apple has potential energy.

Explanation:

Potential energy is the energy of an object at rest. Because the apple is hanging from a tree, it is not moving. Therefore, it has potential energy.

Kinetic energy is the energy of an object in motion. Because the football is moving from being in the air to hitting the ground, it has kinetic energy. When it hits the ground, the kinetic energy gets transferred into the ground.

Hope this helps.

Answer:

the football has kinetic energy and the apple has potential energy

Explanation:

Foot-and-mouth disease virus (FMDV) causes severe disease in pigs, cattle, sheep and goats. High levels of FMDV infection can threaten the livestock industry. Which of the following statements best describes how FMDV reproduces in its livestock host? A. It uses the animal’s cellular machinery to reproduce inside the animal. B. It kills the animal and feeds on its carcass. C.It releases spores into the animal’s digestive tract. D. It produces eggs that are shed on the ground with the animal’s wastes. brainliest to the correct answer

Answers

Answer:

A. It uses the animal’s cellular machinery to reproduce inside the animal.

Explanation:

I would go with A because since it is a virus it cannot live outside the body and thus needs to rely on host's cell for metabolism as viruses are not capable of having their own metabolism.

Answer:

A. It uses the animal’s cellular machinery to reproduce inside the animal.

Explanation:

khan

3 types of protozoan diseases and their causative parasites ​

Answers

Answer:

Malaria, Leishmaniasis, and Toxoplasmosis.

Malaria is caused by Plasmodium parasites.

Leishmaniasis is caused by infection with Leishmania parasites.

Toxoplasmosis is an infection caused by a parasite that is called Toxoplasma gondii.

The number of chromosomes during meiosis is incredibly important.why is that?

Answers

Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes, Meiosis also produces genetic variation by way of the process of recombination.

I hope this helps you

Meiosis refers to the process by which a single cell divides twice to produce four haploid daughter cells. These are the gametes, which are sperms in males and eggs in females.

Why the number of chromosomes is important during meiosis?

Meiosis is a eukaryotic cell division process.  However, the genetic material distributed among the resulting daughter cells is distributed in very different ways by these two processes.

Mitosis results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell.

Meiosis, on the other hand, produces four distinct daughter cells, each with half the number of chromosomes as the parent cell.

Because meiosis generates cells that will become gametes (or reproductive cells), this reduction in chromosome number is critical; without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes.

Thus, we can conclude that the number of chromosomes during meiosis is incredibly important because It allows gametes to have half the original number of chromosomes of the organism.

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What basic unit of heredity is found on segments of DNA and are passed on from parent to offspring?

Answers

Answer:

Genes

Explanation:

Genes are sequences of nucleotides that determine characteristics. They are passed from parents to offspring.

Gene is basic unit of heredity is found on segments of DNA and are passed on from parent to offspring.

What are the characteristics of gene ?

A gene is  physical and functional unit of heredity which is made up of DNA.

Genes control both DNA and RNA function.

Some genes codes protein for functional expression of a trait where as some genes do not code for proteins.

In humans, the size of genes ranges from few hundred DNA bases to more than 2 million bases and human have between 20,000 and 25,000 genes.

Each gene have two copies, one is passed from each parent. Only 1 percent of the total genes is slightly different between people.

This is because of presence two different types of allele the same gene which contribute to each person’s unique physical features.

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Find the sum of the three expressions and choose the correct answer. -8a 3 b + 3a2 b 2 - 5 2 + 5a 2 b 2 3a 3 b + 7 - 9a 2 b 2 $6,000 dollars is invested in two different accounts earning 3% and 5% interest. At the end of one year, the two accounts earned $220 in interest. How much money was invested at 3%? $2,000 $3,000 $4,000 Find the slope-intercept form of the line through (6, 3) and perpendicular to the line y = 3x 5. Conjuguer le verbe Foire et le verbe vouloir ou prsent simple de l'indicatifl aireVouloir 3. A 12 % discount on a pair of washer and dryer that Gayle purchased, amounted to $156.00. Calculate the net price. Find the solution set. 8x^2-2x-3=0 separate the two values with with a comma. Question 18 (5 points)Identify the independent and dependent variables in the following situation: Thetemperature of the water decreases as a diver descends to the bottom of a lake.The independent variable is the temperature of the water, and the dependentvariable is the depth below the surface of the lake.The independent variable is the depth below the surface of the lake, and thedependent variable is the temperature of the water.The independent variable is the speed at which the diver descends, and thedependent variable is the temperature of the water.The independent variable is the type of boat, and the dependent variable is thetemperature of the water. What were two reasons that Britain was opposed to the Soviet Union's occupation of Poland after World War II? A parallel-plate air capacitor is connected to a constant-voltage battery. If the separation between the capacitor plates is doubled while the capacitor remains connected to the battery, the energy stored in the capacitor1) drops to one-fourth its previous value.2) quadruples.3) becomes six times its previous value.4) doubles.5) drops to one-third its previous value.6) Not enough information is provided.7) triples.8) drops to half its previous value.9) drops to one-sixth its previous value.10) remains unchanged. Darrell works for a company that promotes an entrepreneurial culture. Employees are encouraged to discuss new ideas. Development time is provided on the job for those ideas that float to the top. Employees who use their creative talents to generate ideas and create products within large companies are called A simple random sample of 20 items resulted in a sample mean of 10. The population standard deviation is = 3. Round your answers to two decimal places. a. What is the standard error of the mean, ? b. At 95% confidence, what is the margin of error? During the period, labor costs incurred on account amounted to $175,000, including $150,000 for production orders and $25,000 for general factory use. In addition, factory overhead charged to production was $32,000. The entry to record the direct labor costs is a. Work in Process150,000 Wages Payable150,000 b. Wages Payable150,000 Work in Process150,000 c. Wages Payable175,000 Work in Process175,000 d. Work in Process175,000 Wages Payable175,000 A drug problem can quickly consume A)a small portions of a person income B)the bulk of a person income C)a person excess income can someone help me with this please??? what helllo in spanish and french easy questions for points and brainly parasympatheticQuestion 1010 pPatients with acute anxiety disorder overstimulate whichsubdivision of the nervous system?CNS Supporters of Manifest Destiny believed:A. the United States was meant to extend to the Pacific Ocean.B. it was important avoid conflicts with European countries.C. the United States should remain the same size.D. they should respect the rights of American Indians. The whole number which is not a natural number is How can a writer edit a narrative to include vivid imagery? Select three options.use specific, strong verbs in place of general onesuse dialogue to develop the characteruse descriptive words that appeal to the reader's sensesuse setting to place the story for the readerI use active voice to show instead of tell the reader marcus receives an inheritance of $13,000. he decides to invest this money in a 10-year certificate of deposit (CD) that pays 3.0% interest compounded monthly. how much money will marcus receive when he redeems the CD at the end of 10 years?