Examlex
The endocrine system sends signals using chemical messengers called ________.
Looking Backward
A utopian science fiction novel by Edward Bellamy that imagines a future society based on social harmony and economic equality.
Social Darwinist
A belief system that applies Darwin's theory of natural selection to society, suggesting that humans compete in a struggle for existence in which only the fittest survive.
Q21: Cnidarians such as jellyfish have muscle and
Q31: A friend tells you that his Aunt
Q40: Which of the following typically connects a
Q45: The protein actin is found in the:<br>A)
Q48: Your muscles contract using contractile proteins to
Q50: Are involved in chemical reactions
Q54: Neurons are not true cells because they
Q55: Guard cells are responsible for:<br>A) transport of
Q66: During which of these eras were dinosaurs
Q76: Oil spills in the ocean are often