a scientist is interested in finding out the effect of soil quality on crop yield. would an experimental or observational study design be more appropriate?

Answers

Answer 1

To determine the direct effect of soil quality on crop yield, an experimental study design is more suitable.

In the case of investigating the effect of soil quality on crop yield, an experimental study design would be more appropriate.

An experimental study allows the researcher to manipulate the independent variable, which in this case would be the soil quality. The researcher can create different conditions by manipulating the soil composition, nutrient levels, pH, or any other relevant factors that contribute to soil quality. This manipulation allows for controlled comparisons between different treatments or groups.

By conducting controlled experiments, the researcher can establish a cause-and-effect relationship between soil quality and crop yield. They can measure and compare the crop yield under different soil quality conditions while controlling other variables that could potentially influence the outcome.

On the other hand, an observational study design would involve observing and collecting data on existing soil quality and crop yield without manipulating any variables. While observational studies can provide valuable insights and correlations, they do not establish a causal relationship as effectively as experimental studies.

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Related Questions

What type of protein is missing in the blue people of KY?​

Answers

Answer:

four-part protein

Explanation:

The blue people of Troublesome Creek had methemoglobinemia, a metabolic condition affecting hemoglobin, the four-part protein that carries oxygen bound to an iron atom at each subunit's core.

Hope this helps:)

Answer:

The blue people of Troublesome Creek had methemoglobinemia, a metabolic condition affecting hemoglobin, the four-part protein that carries oxygen bound to an iron atom at each subunit's core.

Explanation:

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would you expect a plant to produce more oxygen on a cloudy day or a sunny day? explain

Answers

Answer:

You would expect a plant to produce more oxygen on a sunny day because there are more sun rays available to plants so photosynthesis is easier to maintain, as well as oxygen production.

What brain region is responsible for coordinating and refining movement?
The diencephalon
The cerebrum
The brain stem
The cerebellum

Answers

Answer:

The cerebellum

Explanation:

Answer:

I hope this helps.

Explanation:

Describe the type of plate movement that is occurring where subduction zone volcanoes are found.

Answers

Answer:

Convergent boundary

Explanation:

It's when the plates move together and subduction occurs when one plate moves underneath another on a convergent boundary. Volcanoes are found there.

P.S. Brainliest, please?

how are organisms impacted by the changing landscape

Answers

Any change in the climate of an area can affect the plants and animals living there as well the makeup of the entire ecosystem

Answer:

Animals can be impacted in a variety of ways, one example being that humans continue to expand their territory they are taking homes and resources to organisms that inhabit that land, this can lead to population decreases as the organism will be forced into a new environment that they are not adapted to.

What type of plate boundary is illustrated in the image?

Answers

Answer:

convergent is your answer

Answer:

convergent

Explanation:

convergent is when 2 plates collide into each other

Please help due in 10 minutes!
Explain how genetic drift of alleles in a small population- and- describe 2 real world examples of genetic drift (I.e. The Founder Effect and The Bottleneck Effect)

Answers

Answer:A small population is formed with a larger population.

Explanation:The population don’t represent the genetic diversity’s of the original

Population, and there smaller size mean they may experience strong drift of generations.

A couple has five children, all with blood type A. The mother's blood type is O, and the fathers blood type is A. Based on this info, what is the most probable genotype of the father?

Answers

Answer:

Homo-zygous, or AA

Explanation:

Since the mother's type is recessive O, the man's blood type A would be dominant.  And because none of the children gained B or O blood types, it is likely the father only has A.  This indicates homo-zygous (same) genotype, thus meaning his blood type is AA.

the reason for the dash between homo-zygous is because Brainly tagged it as inappropriate?

Each of the following is a density-dependent limiting factor EXCEPT:

- crowding
- predation
- competition
- disease

Answers

Answer:

predation

Explanation:

predation

I hop this answer is correct

Answer:

Disease

Explanation:

What determines the amount of biomass a given trophic level can
support? *

Answers

Explanation:

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If you know please help

Answers

Answer:

A. freeze at the same temperature at which it melts, depending on whether the temperature is rising or falling.

Explanation:

Option A is the correct.

Freezing and melting are two changes that occur in the state of matter. Freezing is known to be the change that occurs when a substance (liquid) changes to solid when there is a decrease in temperature. While melting is known to be the opposite and it refers to the change that occurs when a solid changes to liquid as a result of increase in temperature.

When substances freeze, they do so in the same temperature as they melt. This is true because both freezing and melting actually describe similar transition of matter. So, it depends whether temperature is rising or whether it is falling.

Which of these has a warming effect on Earth? O A. More evaporation of water due to warmer temperatures causes low, thick clouds to form. O B. More evaporation of water due to warmer temperatures increases water vapor, forming high, thin clouds. C. Earth's oceans absorb carbon dioxide from the atmosphere D. Rising carbon dioxide levels spur plant growth, causing increased carbon dioxide absorption.​

Answers

Answer:

A

Explanation:

Thick clouds can trap lots of heat. This has a warming effect on earth.

Answer:

B.. More evaporation due to warmer temperatures increases water vapor, forming high, thin clouds

Explanation:

Thin clouds don't reflect as much sunlight as low, thick clouds do. Because of that more sunlight enters the atmosphere and increases global warming

How could physical barriers, such as a river or rift, lead to allopatric speciation

Answers

Answer:

This barrier prevents the individuals on one side from reproducing with the individuals on the other.

Explanation:

Hope this helps

List the four steps of mitosis in order. Describe what is happening during each phase.

Answers

Answer:

The four stages of mitosis are known as prophase, metaphase, anaphase, telophase. Additionally, we'll mention three other intermediary stages (interphase, prometaphase, and cytokinesis) that play a role in mitosis. During the four phases of mitosis, nuclear division occurs in order for one cell to split into two.

Explanation:

PLZ HELP!! Which expels solid waste from the body? A. Liver. B. Large intestine. C. Pancreas. D. Anus

Answers

Answer:

anus LKEJKEGWHRJK

Explanation:

Answer:

I think it is D) Anus

Explanation:

Solid waste leaves the body through the anus

Hope that helps

What is found between stars that looks like smoke?

Answers

Answer:

gases of nitrogen and many more

Cosmic dust consists of tiny particles of solid material floating around in the space between the stars. ... It is not the same as the dust you find in your house but more like smoke with small particles varying from collections of just a few molecules to grains of 0.1 mm in size.

Determine the type of air mass that typically plays a role in the weather in your area. Describe the
type of weather that commonly is associated with the air mass and where the air mass originates. Describe the seasons in your area which result from that air mass.

Answers

Answer:

There are four categories for air masses: arctic, tropical, polar and equatorial. Arctic air masses form in the Arctic region and are very cold.

The predominant plants found in the savanna are grasses, and there are only a few isolated or small clusters of trees. Which abiotic factor helps to maintain the savanna as a grassland rather than a forest?
A Loose Soil
B Abundant rainfall
C warm temperatures
D lightning Fires
PLEASE HELP

Answers

A if I am correct ...…...................

Loose soil is the abiotic factor which helps to maintain the savanna as a grassland rather than a forest. Thus, the correct option is A.

What are abiotic factors?

Abiotic factors are those components of the ecosystem which are non-living. Abiotic factors include soil, temperature, rainfall, fire, etc.

Savanna is a biome which contain predominantly grasses with a few isolated or small clusters of trees in the ecosystem. The loose soil in this biome is mainly responsible for maintaining savanna as a grassland rather than a typical forest.

Loose soil is an abiotic factor which is responsible for the forestation of an ecosystem. It is difficult for the big trees to hold the loose soil whereas the grass have their perennating organs protected below the surface of the soil. Thus, they are favored in the savanna biome.

Therefore, the correct option is A.

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A student examining an unknown cell under a microscope notes it has a cell wall, cytoplasm, and genetic information contained within a nuclear membrane. Which inference would be correct?

Answers

Answer:

It is a eukaryotic cell

Explanation:

Eukaryotic cells have membrane-bound organelles (in this case the cell has a nuclear membrane with genetic information).

Bacteria, archaea, fungi, plants, and algae have a cell wall

Describe the basic structure of the cell membrane with regard to specific molecules. What is it made out of?

Answers

Answer: The cell membrane is made up of phospholipids and the overall name is the Phospholipid bi-layer

Explanation:

The cell membrane has two rows of phospholipids.  A phospholipid is broken into two parts, the heads and tails.  The heads are hydrophilic (water-loving) and point to the outside and inside regions making the inner and outer wall, while the tails are hydrophobic (water-hating) and face each other to make the inside of the membrane.  There are also molecules of cholesterol and proteins throughout the membrane.

Phospholipids are the building blocks of a cell membrane. A single phospholipid molecule consists of two ends: the head and the tail.

What are phospholipids?

Phospholipids are amphiphilic molecules with both hydrophobic and hydrophilic fatty acid chains.

They are found in all living organisms as the primary components of cell membranes. Nature contains a variety of phospholipid classes with varying polar moieties.

Phospholipids are glycerol esters, fatty acid esters, phosphoric acid esters, and other alcohol esters.

Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine are the most common phospholipids.

The phospholipid bilayer, which forms a stable barrier between two aqueous compartments, is the membrane's fundamental structure.

These compartments are the inside and outside of the cell in the case of the plasma membrane.

Thus, this is the basic structure of the cell membrane with regard to specific molecules.

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Why do you think it's important for scientists to study plate tectonics? Explain.

Answers

Scientists are helping to improve understanding of how rocks in Earth's hot, deep interior enable the motions of tectonic plates, which regulate the water cycle that is critical for a habitable planet.

Studying plate tectonics is important because it helps explain Earth's surface features, predict natural disasters, investigate Earth's history, explore natural resources, and understand global climate patterns. It is a multidisciplinary field that provides valuable insights into the dynamic nature of our planet.

Scientists study plate tectonics for several important reasons. Firstly, understanding plate tectonics helps scientists explain the formation of different features on Earth's surface, such as mountains, valleys, and ocean basins. By studying the movement and interactions of Earth's tectonic plates, scientists can better understand the processes that shape our planet.

Secondly, studying plate tectonics is crucial for predicting and understanding natural disasters. Earthquakes, volcanic eruptions, and tsunamis are all related to tectonic activity. By analyzing plate boundaries and identifying areas prone to seismic activity, scientists can provide early warnings and help communities prepare for potential disasters.

Furthermore, studying plate tectonics is essential for investigating Earth's history. The movement of tectonic plates over millions of years has shaped the continents and influenced the evolution of life on our planet. By examining the distribution of fossils and rock formations, scientists can reconstruct past tectonic events and gain insights into Earth's geological history.

Additionally, understanding plate tectonics is crucial for exploring natural resources. Many valuable minerals and energy resources are formed as a result of tectonic processes. By studying plate boundaries and their associated geological features, scientists can identify potential locations for mining and resource extraction.

Lastly, studying plate tectonics contributes to our understanding of global climate patterns. The movement of tectonic plates affects ocean currents, weather patterns, and the distribution of landmasses. By analyzing these interactions, scientists can better predict and understand climate change.

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All of the following are types of somatoform disorders except __________.
A.
conversion disorder
B.
obsessive-compulsive disorder
C.
somatization disorder
D.
hypochondrias

Answers

Answer:

B.

obsessive-compulsive disorder

Explanation:

The types of somatoform disorders does not include the obsessive-compulsive disorder.

What is somatoform disorders?

Somatic symptom disorder (SSD should be called as the somatization disorder or somatoform disorder. It is the form of mental illness that leads into one or more symptoms such as pain.

Therefore, it include the conversion disorder, somatization disorder, hypochondrias

Hence, the option b is correct.

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How can homologous structures be used as evidence for shared common ancestry?

Answers

Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants. They all have the same basic pattern of bones. They inherited this pattern from a common ancestor. However, their forelimbs now have different functions

If water is polar, state a liquid that you think is nonpolar, and justify your answer

Answers

A gas. This is because none polar solvents contain binds between atoms with similar electronegativities, some examples are carbon and hydrogen

Explain how ligand A and ligand B can cause identical cellular responses in a cell.

Answers

Answer:

if A and B are both dominant/recessive then they are the same

Explanation:

I'm not to sure but I think it's right

hope this helps : )

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How do we differentiate between infectious and noninfectious diseases.

Answers

Answer:

Infectious diseases are caused by the passing of one person to another. Corona is an example. Noninfectious diseases, they are just spread by pathogens. Good luck!

What is the major thing happening to a cell during G1?

Answers

Answer:

During this stage new organelles are being synthesized (made), so the cell requires both structural proteins and enzymes, resulting in great amount of protein synthesis. Color the G1 phase green on the cell cycle drawing.

Explanation:

During this stage new organelles are being synthesized (made), so the cell requires both structural proteins and enzymes, resulting in great amount of protein synthesis. Color the G1 phase green on the cell cycle drawing

Please help me out!

Which of the following is NOT true about the chromosomes in your body?

-Include 46 total chromosomes
-Include 2 sex chromosomes
-Exist in 46 pairs
-Exist in 23 pairs

Answers

Answer:

Exist in46 pairs

Explanation:

Which of the following IS
an example of reproductive isolation?
O two populations
of finches that cannot produce viable offspring
O two populations of finches that have different feather colors
• two populations of salamanders that live in different lakes
O two populations of salamanders that
have different tail lengths

Answers

An example of reproductive isolation is two populations of salamanders that live in different lakes. Thus, the correct option is C.

What is Reproductive isolation?

Reproductive isolation may be defined as the inability of a species to interbreed successfully with related species members due to isolating mechanisms.

Reproductive isolation may leads to speciation. A single specie scan generates multiple species via reproductive isolation. The members of the same species undergo reproductive isolation due to several isolating mechanisms.

The isolating mechanisms include geographical, behavioral, physiological, or genetic barriers.

Therefore, the correct option for this question is C.

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Please help ASAP!
How would a cell wall aid a plant during a period of heavy or prolonged rainfall?

Answers

Answer:

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against stress

Explanation:

The cell wall aid a plant during a period of heavy or prolonged rainfall by providing structural support, prevents water damage, regulates water uptake and maintains turgor pressure.

What is a cell wall?

Cell wall is the outermost covering of the cell above the plasma membrane, which plays an important role in helping the plant survive during periods of heavy rainfall and prolonged rainfall.

The ways in which it provides protection are:

Structural support- It provides necessary strength and rigidity to the plant, which helps it to stand upright and not collapse under the weight of water.Prevents water damage- It acts as a barrier by preventing water from entering the cells and causing damage to the plant internal structure.Regulates water uptake- It controls the flow of water into the plant, which helps regulate the water uptake and prevent the plant from taking in too much water.Maintains turgor pressure- It also helps to maintain turgor pressure.

Hence, the cell wall provides significant support and protection for the plant during periods of heavy and prolonged rainfall.

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