What are two principal criteria by which an element can be judged essential to any plant?
What will be an ideal response?
• An element is essential if the plant cannot complete its life cycle (forming viable
seeds) in the absence of that element.
• An element is essential if it forms part of any molecule or constituent of the plant that
itself is essential in the plant; for example, magnesium is an integral part of chlorophyll.
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Which of the following is the term for the rate at which torque is produced.
A. Foot-pounds B. Newton-meters C. Energy D. Horsepower
For a spot speed study in which 100 observations were obtained, the mean speed was 52 mi/h and the standard deviation was 4.6 mi/h. What is the margin of error on the estimate of true mean speed obtained from this sample? What is a reasonable estimate of the 85th percentile speed based on the information available?
What will be an ideal response?
When a dimension is underlined, it means that the part has other interchangeable parts available.
Answer the following statement true (T) or false (F)
The ozone layer is in which of earth's atmospheric layers?
A) Stratosphere B) Mesosphere C) Thermosphere D) None of these is correct