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An organism is considered truly multicellular when ________.

A zombie apocalypse wipes out almost the entire human species before the zombie threat is eliminated. Only a group of 100 people who were at a family reunion on an uninhabited island survived. They returned to the mainland completely unaware of what had happened to everyone. Answer the following question(s) regarding the few survivors who now begin to rebuild the human population.Certain traits will have been lost from the gene pool forever. This loss of diversity in a reduced population is called ________.

Human birth rate peaked in the 1980s and has been slowly declining ever since. How is this expected to affect our population size over the next several decades?

Most chordates are ________.

Perennials are ________.

Which type of white blood cells produces defensive proteins called antibodies?

Why are echinoderms and chordates closely related?

The tall ferns that we typically see in the tropics and temperate woodlands are the ________.

Humans are more related to fungi than to plants.

The tall ferns that we typically see in the tropics and temperate woodlands are the ________.