Platyhelminthes were the first organisms to have ____

a. a fully developed brain
b. a notochord
c. a central nervous system
d. metamerism
e. an excretory system


c

Environmental & Atmospheric Sciences

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The movement of materially wealthy people into inner cities, displacing materially poor people, is called _________________.

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences

What is an ophiuroid?

A) Sea urchins B) Tunicate C) Salps D) Brittle stars

Environmental & Atmospheric Sciences

Shifting maritime and continental air masses are a causal factor of mesothermal climates

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The bulk of the world's population lives within the Tropical climates

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences