B. A double-blind technique
C. A short observation period
D. A voluntary enrollment plan
A scientist's primary concern in a clinical trial is the patient's safety, there fore short observation decreases the reliability of results from a clinical trial
Answer:
C. A short observation period
Explanation:
ape.x
Answer: " S , P , O , N, C, H " .
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Explanation:
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" S (sulfur), P (phosphorous), O (oxygen), N (nitrogen), C (carbon), and H (hydrogen) — are the six elements from the Periodic Table of Elements — and from the answer choices provide — that are the most present in living things.
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b. They decrease.
c. They do not change.
d. They go in cycles.
the answer is A. THEY INCREASE
The preservation of ancestor species is important for human welfare for several reasons. One reason is that these species may contain important genetic material that can be used to develop new crop varieties with desirable traits, such as disease resistance or increased yield.
For example, the Mexican teosinte is considered the ancestor of modern corn, and its genetic material has been used to develop new corn varieties with increased resistance to pests and environmental stresses.
Preserving ancestor species is also important for maintaining the biodiversity of the planet. Biodiversity is important because it provides ecosystem services, such as air and water purification, nutrient cycling, and carbon sequestration, that are critical for human survival and well-being. Additionally, biodiversity is important for cultural and aesthetic reasons, as many people value the natural world for its beauty and intrinsic worth.
To know more about preservation of ancestor species, , click here:-
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b. provide rigid structure for cell
c. package proteins for export
d. carry out photosynthesis
burning wood
hot stove
gas pump
A water fall can be used as a source of renewable energy.
It is obtained from sources that can be replenished. They can not be depleted with use.
Renewable energy includes solar energy, geothermal energy, wind energy, etc.
It can be used to generate hydroelectricity.
To learn more about renewable energy and hydroelectricity here,
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Answer:
solar energy, wind energy, hydropower, geothermal energy, and biomass energy. These types of energy sources are different from fossil fuels, such as coal, oil, and natural gas.