Regular Lawn Mowing Selects for Dandelions with Short Heads Rather

question 25

Multiple Choice

Regular lawn mowing selects for dandelions with short heads rather than dandelions with tall heads because

• A)tall flowers spread their seeds farther.
• B)tall flowers cannot reproduce.
• C)short flowers can reproduce.
• D)short flowers spread their seeds farther.
• E)short flowers have less competition when the lawn is mowed often.

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Definitions:

First Land Plants

Early plants that began to colonize the land over 470 million years ago, evolving adaptations to survive in terrestrial environments.

Radiometric Dating

Radiometric dating is a technique used to date materials such as rocks or carbon, by determining the relative proportions of particular radioactive isotopes present in the sample.

Isotope Decays

The process by which an unstable atomic nucleus loses energy by emitting radiation, leading to a change in its atomic number or mass.

Half-Life

Characteristic time it takes for half of a quantity of a radioisotope to decay.