Sort the questions based on whether they are better answered by an observational study or a controlled experiment.

Biology

2 answers:

s2008m [1.1K]3 years ago

8 0

Although the actual questions are missing from your ask, here's how you can tell.

If the study will be messed up (added bias) through interaction with the subjects the study should be observational. For example if a biologists wanted to study the eating habits of wild birds in the tropics, they would need to do an observational study. if they did a controlled experiment, the birds will change their eating habits based on human interaction, thus making the study invalid.

If the study requires specific measurements, close monitoring, or contact and interaction with the subjects the study should be a controlled experiment. For example, if a scientist wanted to test out a new drug, the health of patients would need to be closely monitored.

kenny6666 [7]3 years ago

4 0

Answer:

Observational Study: Why does a rolling ball slow down and How effective is a new toothpaste in reducing cavities.

Controlled experiment: How does the daytime temp affect the formation of dew, Which is a better absorber of heat and Can plants prepare food in artificial light

Explanation: i just took the test and these are the correct answer.

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What impacts do the amounts of available energy, water, and oxygen have on an ecosystem?

bearhunter [10]

Answer:

What impact do the available amounts of energy, water, and oxygen have on an ecosystem? They act as limiting factors. ... increasing the biodiversity of the ecosystem.

7 0

2 years ago

A) A man has two recessive alleles. What is his phenotype? (1 point)

diamong [38]

Answer:

His phenotype would be having dry earwax

Explanation:

8 0

2 years ago

True or False? The pharynx and larynx are generally not coordinated during swallowing in an unresponsive person, making them mor

alexandr1967 [171]

<h2>Correct Answer is True</h2>

Explanation:

True.
During swallowing, the pharynx changes from airway to a food channel channel.During mastication, the food bolus aggregates in the pharynx before swallow commencement.

The structures in the oral pit, pharynx and larynx serve various capacities in breathing, talking, rumination and swallowing,
Unsourced material might be tested and removed.
The nasal cavity, The pharynx is the piece of the throat behind the mouth and larynx the cylinders going down to the lungs and stomach .
Nourishment and fluid pass in reverse into the throat on their way to the stomach. Air pass out through the larynx and into the trachea.

5 0

4 years ago

Deposition is a

mixer [17]

Answer: D) constructive process

Explanation:

Deposition is the geological process in which sediments, soil and rocks are added to a landform or land mass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.

8 0

3 years ago

The epidermis is composed of five cell types. match each type to its description.

WITCHER [35]

Listed under are the 5 different type of cells found in the epidermis and their description:

1. Stem cells
These are what you call undifferentiated cells. These are cells found in the stratum basale, which is the deapest layer of the epidermis. These cells divide to create keratinocytes.

2. Keratinocytes
The make up the majority of the cells in the epidermis. They synthesize keratin which are proteins that make up your hair, skin, and nails. They can also be found in other organs inside your body.

3. Melanocytes
These cells can only be found in the stratum basale. They synthesize melanin with a brown to black pigment. These dark pigments serves as protection for the skin from harmful UV rays.

4.Merkel cells
Merkel cells are also known as tactile cells. They are the sensory receptor for touch. Merkel cells and the nerve fiber together are called the Merkel disc.

5. Dentritic cells
They are also known as Langerhans cells. They can be found in two layers of the epidermis: the stratum spinosm; and stratum granulosm. They are what you call macrophages that come from the bone marrow. They serve as immune cells that provide protection against toxins, microbes and other pathogens that try to penetrate the skin.

Hope you find some information above that will help you.

3 0

4 years ago