Converting Atmospheric Nitrogen into Chemical Forms That Can Be Used

question 69

Multiple Choice

Converting atmospheric nitrogen into chemical forms that can be used biologically is called fixation. Which of the following organisms can fix nitrogen?

• A)insects
• B)oak trees
• C)bacteria
• D)fish

Identify the variables in experimental studies (independent and dependent) and their roles within the research design.

Recognize the importance and characteristics of reliability and validity in research measures.

Grasp the concept of sociometry and its application in understanding group structure and social networks.

Comprehend the benefits and limitations of observational methods, and how structured observation solves issues of objectivity.

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Definitions:

Trimester

A Trimester is a term divided into three parts, commonly used to describe the three periods of approximately three months each in a pregnancy, marking different developmental stages of the fetus.

High Blood Pressure

A condition where the force of blood against artery walls is too high, often leading to health problems such as heart disease.

Rh Incompatibility

A condition where a pregnant woman's blood type is Rh-negative and her unborn baby’s blood type is Rh-positive, potentially leading to health problems in the baby.

Rh-Positive

Refers to the presence of the Rh antigen on the surface of red blood cells, a significant factor in blood transfusion compatibility.