The Oldest Definitive Trace of Flowering Plants in the Fossil

question 52

Multiple Choice

The oldest definitive trace of flowering plants in the fossil record consists of:

• A) pollen grains in an anther.
• B) pistils on vegetative stems.
• C) petals and sepals.
• D) ovules enclosed in podlike fruits.
• E) primitive embryo sacs.

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Definitions:

Slope

The rate at which a line inclines or declines, calculated as the ratio of the vertical change to the horizontal change between two points on the line.

Intercept

In the context of linear regression, the intercept is the expected value of the dependent variable when all independent variables are equal to zero.

Predicted Income

An estimate of future financial earnings based on factors such as education, occupation, and economic trends.