The statement that explains why randomized controlled trials are often "double blind" is as follows: to decrease bias by ensuring both the participants and researchers do not know who is receiving the treatment and who is not (option B).
<h3>What is a double blinded experiment?</h3>
Double-blinded experiments are forms of scientific testing in which some information is withheld from two different parties.
In summary, neither the tester nor the subjects tested know which are the control items and which are the test items.
A double blinded is conducted to reduce or eliminate bias between the participants and researchers.
Therefore, the statement that explains why randomized controlled trials are often "double blind" is as follows: to decrease bias by ensuring both the participants and researchers do not know who is receiving the treatment and who is not.
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The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. ... Humans play a major role in the carbon cycle through activities such as the burning of fossil fuels or land development.
Answer:
It goes to the right in the northern hempisphere
Is to preserve homeostasis by coordinating and regulating the activities of other cells, tissues, organs, and systems
Answer:
Rocks are classified as igneous, sedimentary, or metamorphic, based primarily on their method of formation.
Explanation:
Rocks are naturally formed solid material made up of minerals. They are classified into different types by its chemical composition, the minerals included, and the method of formation. The three main types of rock based primarily on their method of formation are sedimentary, metamorphic, and igneous rocks. These rocks make up the earth’s lithosphere.
Igneous rocks are formed by the cooling and hardening of magma (molten rock deep within the earth) inside the earth or erupts onto the surface from volcanoes as lava. Examples of igneous rocks are basalt and obsidian.
Sedimentary rocks are formed from the particles of sand, shells and other particles called sediment which are the products of weathering on the earth’s surface. These sediments accumulates and gradually hardens into rock. It is the only type of rock that contains fossils. Conglomerate and limestone are the examples of this type of rocks.
Metamorphic rocks are formed by the intense temperature and pressure changes under the surface of the earth. These rocks have ribbon like layers and shiny crystals formed by minerals growing on their surface slowly over time. Gneiss and marble are the examples.
