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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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Life would not be possible on earth without the water that covers much of its surface and the air that surrounds it, earth water
JulsSmile [24]
Well the hydrosphere is all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds. The Atmosphere is the envelope of gases surrounding the earth or another planet. So i'm going to go with D, Evaporation from the lakes and rivers.
8 0
4 years ago
To make new cells, humans undergo a process of cell division called mitosis. Before a cell goes through cell division (mitosis),
sashaice [31]

Before a cell goes through cell division (mitosis), it must grow and make a copy of its DNA which is termed as an Inter-phase.

<u>Explanation:</u>

Some tasks must be carried out by the cells before they undergo division: The cell must grow, it must copy the genetic material (DNA) present in it, and  divide into two daughter cells. These steps carried out by cells are termed as  cell cycle.

Cells that contains a nucleus or Eukaryota cells, there are two major phases called interphase and the mitotic (M) phase. that comprises the cell cycle.

In  inter-phase, growth of the cell and making a copy of its DNA is carried out.

In mitotic (M) phase, the cell separation of the DNA in the cell into two sets and division of its cytoplasm takes place resulting in the formation of two new cells.

5 0
3 years ago
The relationship between heredity and environment is
Lilit [14]
Not the same and they is not in a relationship
7 0
4 years ago
During an action potential, depolarization occurs as a result of
Veseljchak [2.6K]

Answer:Action potentials result from the depolarization of the cell membrane (the sarcolemma), which opens voltage-sensitive sodium channels; these become inactivated and the membrane is repolarized through the outward current of potassium ions.

its 'b'

Explanation:

6 0
3 years ago
An agricultural biologist was evaluating two newly developed varieties of wheat as potential crops. In an experiment, seedlings
Rus_ich [418]

Answer:

The definition is listed in the clarification segment below, and according to the present circumstances.

Explanation:

It undergoes different morphological as well as biochemical modifications mostly during germination. Product contains nutrients and even some hydrolases such as energy, carbohydrates. Owing to the availability of phytic compounds, the seed coat seems to be very durable in nature. Hydrolytic enzymes launch their function by consuming oxygen throughout order to remove this hard coating. In several other processes, including the electron transport system as well as the Kreb process, oxygen also becomes necessary.

  • The initial phase of germinating seeds requires anaerobic environments where even the enzymes dehydrogenase can function. The subsequent dehydrogenase enzyme brings the electron throughout the electron transport system from either the base to oxygen.  
  • Unless the oxygen frequency is compared with varieties A and B, it can be seen through the analysis that variety B actually absorbed more oxygen. Oxygen intake rates are also depending upon period.
  • The impact of temperature mostly on absorption of oxygen seems to be present. Shift the supply at low temperatures have a low intake of oxygen, while varieties grown over extreme temperatures use much more oxygen. The metabolism of such a seedling is influenced by temperature. Metabolically active young plants display a larger intake of oxygen.
8 0
3 years ago
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