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Ghella [55]
3 years ago
7

A researcher studying handwashing uses guidelines set by the American Society of Microbiology to determine if handwashing has ta

ken place: use warm or hot running water and soap while washing for 10 to 15 seconds all surfaces, including wrists, palms, backs of hands, and under fingernails. This guideline is considered a. the Hawthorne effect. b. an operational definition. c. a correlation. d. a test.
Biology
1 answer:
Mariana [72]3 years ago
5 0

Answer:

The correct answer is b. an operational definition.  

Explanation:

An operational definition constitutes the set of procedures that describe the activities that an observer must carry out to receive sensory impressions, which indicate the existence of a theoretical concept to a greater or lesser degree. In this sense, it tries to clearly indicate how the variables are going to be manipulated or measured and also indicates that to measure a variable, it is necessary to carry out a series of activities or procedures. It is the one that builds or adapts from others, based on the observable characteristics of the phenomenon; indicating the concrete, empirical elements or indicators of the fact to be investigated.

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Which of the following is an example of a niche?
Brums [2.3K]

Answer:

c. a lion hunting for a zebra in the grassland

Explanation:

Sorry, I know its late. I just took the test and was looking for the answer.

4 0
3 years ago
What is considered the fundamental unit of life?
galina1969 [7]

The correct answer is E. A cell

Explanation:

The cell is the smallest unit of life that exists and that constitutes all living organisms and body tissues including unicellular and multicellular organisms. Due to this, cells are considered as the fundamental unit of life as even the smallest and simplest living organisms are made of cells or at least made of one cell.

Cells are commonly made up of three main parts: the cell membrane which surrounds the cell and controls the substances that enter and leave it; the nucleus which is the structure within the cell that contains the nucleolus and most of the cell's DNA; and the cytoplasm that is the fluid inside the cell that contains other tiny cell particles with specific functions, such as the Golgi apparatus, mitochondria, and the endoplasmic reticulum. This applies to all cells except to prokaryotic cells because these do not contain a nucleus but a chromosome in the middle of the cell.

5 0
4 years ago
Effects of Cycles on Ecosystems
dybincka [34]

Answer:

The atmosphere

Explanation:

The major reservoir of carbon in the abiotic environment is the atmosphere where it occurs as carbon dioxide. Atmospheric carbon dioxide is used by green plants for the synthesis of organic compounds through photosynthesis.

8 0
3 years ago
HELP ASAP PLEASE!!!! 20 Points
valentina_108 [34]

Answer:

swimming is considered a low impact exercise

sprinting for 30 seconds during a jog is a wind sprint

running is a high impact exercise

short, high intensity segments are wind sprints

low impact exercises produce(s) less stress on the joints

Explanation:

4 0
3 years ago
Neuroglia do all of the following except:______. a. transmit electrical impulses. b. regulate interstitial fluid composition. c.
Ivenika [448]

Answer:

Option A, transmit electrical impulses

Explanation:

Neuroglia also known as glial cells which act as supporting cells for the nervous system and its functioning. These cells surrounds the neurons and produce insulation between them as they produce myelin sheath that coats the axon. There are six types of neuroglia cells and they all work to provide essential nutrients to the neuron cell and also maintain the homeostasis (under which it also regulate the interstitial fluid composition and repair tissue framework)

Hence option A is correct

8 0
4 years ago
Read 2 more answers
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