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Which chordate trait evolved first?

Echinoderms can be best described as ________.

Compare the flow of energy and the flow of nutrients in ecosystems.

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.Which of the following processes is most likely to occur on this small population of humans?

Which process of evolution does not change the total number of species?

Today, we are in the ________ geologic era.

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 ________.