Which began first?
A) Multicellular life in the ocean
B) Multicellular life in fresh water
C) Plants colonizing the land
D) Animals colonizing the land
A
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During the 1968 Olympic Games, the International Olympic Committee performed an analysis of ____ on all female athletes in order to verify their sex
a. Barr bodies b. hormone levels c. karyotypes d. genitalia e. phenotypes
The role of the postsynaptic neuron in neural communication is to ____
a. release neurotransmitters b. use gated calcium channels c. contain synaptic vesicles d. block the action of neurotransmitters e. receive the signal from the presynaptic cell
The complement system performs which of the following functions?
A) Facilitating and enhancing phagocytosis B) Bridging innate and adaptive immune responses C) Disposing of immune waste products D) All of the above
Which of the following types of animal virus requires RNA-dependent RNA transcriptase to be replicated?
A. +ssRNA viruses B. ssDNA viruses C. -ssRNA viruses D. retroviruses E. dsDNA viruses