Which phylum is associated with all of these terms: asymmetry, choanocytes, filter feeding, osculum, and spicules?
a. Porifera
b. Nematoda
c. Ctenophora
d. Nemertea
Answer: a. Porifera
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Three populations of an organism, each with drastically different external markings, but still members of the same species, would be called _______
A. homologs B. mutants C. communities D. alleles E. morphs
Dynein is a molecular motor that:
a. Moves cargo to the plasma membrane b. Moves cargo to the actin filaments c. Moves cargo to the centrosome d. Acts as an actin filament e. None of the above
Deuterostomes are characterized by __________ and __________ cleavage
a. radial; determinate b. radial; indeterminate c. spiral; determinate d. spiral; indeterminate e. blastopore;synapomorphy
The pacemaker is located in the atrioventricular node
____________________ Indicate whether the statement is true or false.