What Is the Current State of the Search for Extraterrestrial

question 11

Multiple Choice

What is the current state of the search for extraterrestrial radio communications?

• A) Several extraterrestrial civilizations have been found, but they are not intelligent enough for us to bother with and the search is continuing.
• B) Occasional single-frequency searches have been made for extraterrestrial signals, but funds are still being sought for the first major continuous monitoring effort.
• C) A number of frequencies in the "water hole" are being monitored, but there has been no major effort as yet to send out continuous signals from Earth at these frequencies.
• D) Continuous transmissions are being sent out from Earth at several frequencies in the "water hole," and tens of millions of other frequencies are being monitored.

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Definitions:

Vascular Tissue

Specialized tissue in plants that conducts water and nutrients through the plant body, comprising mainly of xylem and phloem.

Seed

Mature ovule that contains an embryo, with stored food enclosed in a protective coat.

Vascular Plants

Plants that have specialized structures for conducting water and nutrients throughout the organism, including ferns, gymnosperms, and angiosperms.

Sporophyte

The diploid phase in the life cycle of plants and algae that produces spores.