Some Types of Fish Have Specialized Cells Called Electrocytes That

question 171

Multiple Choice

Some types of fish have specialized cells called electrocytes that generate an electric field around their body with which they communicate with other individuals of the same species and can stun prey. Researchers hypothesized that electrocytes produce the electric field in response to blood levels of a hormone called ACTH, and that it was a positive relationship (higher levels of hormone results in a stronger electric field) . Which of the experiments below is the MOST direct test of this hypothesis?

• A)While measuring the strength of a fish's electric field, inject it with ACTH.
• B)Take a blood sample from a fish that is producing a strong electric field; inject the blood into a second fish and measure its electric field strength.
• C)Take a blood sample from a fish that is producing a strong electric field and measure the ACTH levels.
• D)Remove the pituitary gland, which secretes ACTH, from a fish and measure its electric field strength.
• E)While measuring the strength of a fish's electric field, inject it with a saline solution.

Comprehend the process of preparing an informative presentation, including audience analysis and topic selection.

Identify the characteristics of different audience types and tailor presentations accordingly.

Appreciate the importance of thesis statements and purpose statements in speech preparation.

Understand the potential risks and benefits of using humor in speeches.

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Definitions:

Forecast

A prediction or estimate of future events or trends, often based on current data and analysis.

Random Variation Component

Represents the unpredictable fluctuations that are inherent in a set of data, often modeled as random error in statistical analyses.

Seasonal Variation

Periodic fluctuations in data or events that occur regularly based on the season or time of year.

Systematic Patterns

Regular and predictable behaviors or formations that follow a determined order within a data set or observed phenomena.