impact the amount of biomass an
ecosystem can support?
Chase and Hershey conducted experiments in 1952, using bacteriophages that revealed DNA, not protein, was the genetic material.
The experiments that revealed protein was not the genetic material were conducted by Martha Chase and Alfred Hershey in 1952. They were studying a bacteriophage, a virus that infects bacteria, which has two main structures: a protein coat known as the capsid, and a nucleic acid core that contains either DNA or RNA.
Hershey and Chase used radioactive markers to label the protein coat and DNA of the bacteriophage, respectively. Through their experiments, Hershey and Chase discovered that only the DNA entered the host bacteria upon bacteriophage infection, suggesting that DNA, not protein, is the genetic material. Their work was instrumental in establishing DNA as the molecule responsible for heredity.
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Answer:
Casts are cylindrical bodies formed either in the distal convoluted tubules or the collecting ducts of the kidney. Since the walls of the tubule act as a mold for cast formation, the width of the tubule determines the width of the cast.
Explanation:
This is how cast formed.
Casts are cylindrical bodies made by either in the distal convoluted tubules or collecting ducts of the kidney.
Food chains
Food trails
Food squares
b. kidney.
c. cerebrum.
d. placenta.
B. The color of flowers is compared.
C. The weight of three-week-old chickens is determined.
D. The volume of carbon dioxide gas is determined.
The right option is B. The color of flowers is compared.
Qualitative observation is a type of observation that deals with data or information that can be observed with the senses such as sight, taste, touch, and smell. Qualitative observation does not make use of measurements such as height or numbers, but it describes the appearance of an object using descriptive language. Qualitative observations include colors, shapes, and textures of objects.
The color of the flowers is considered a qualitative observation.
Further Explanation:
The people observe things in plenty of ways. Some use numbers in their observations while others use their senses while observing. The later ones are called qualitative observations.
Qualitative observation accounts for the data which is observed through our senses such as smell, taste, touch, sight, and hearing. These observations do not include numbers or measurements. For example shape, color, and texture of materials display qualitative observations.
While observing things qualitatively, one can just see and determine the color and shape of leaves or flowers or fruits which does not include numbers in any way. This is done by the sense of sight. The qualitative observations are not accurate, not measurable, and are not recorded as numbers.
On the other hand, quantitative observations are invariable, measurable, accurate, and can be recorded as numbers. The instrument used while recording the observations are balances, rulers, beakers, and thermometers.
Here, the color of the flowers can be observed through naked eyes which then can be compared. The color observation is not measured in numbers or through any measurable device. It can simply be observed through sight. Therefore, it is a qualitative observation.
The height of the radish seedlings, weight of three weeks old chicken, and volume of carbon dioxide gas are all determined through measurable instruments. The observed height, weight, and volume are measured and written in numbers. As a result, these observations are considered as quantitative observations.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Qualitative Observations
Keywords:
Qualitative observations, shape, balances, height, texture, color, weight, volume, texture, non-accurate, non-measurable.