Which phylum is most closely related
phylogenetically to the first vertebrates?
a. Echinodermata
b. Arthropoda
c. Mollusca
d. Annelida
e. none of these
Answer: a
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The relationship between Trichonympha protozoa and its termite host, and Xenorhabdus bacteria and its nematode host, are both obligatory relationships.
Answer the following statement true (T) or false (F)
What do you know about ions? How does it relate to the question?
What will be an ideal response?
The ability of predators to eat and digest prey determines the number of prey captured as is shown in ____
a. type I response only b. type II response only c. type III response only d. types I and II only e. types I, II and III
The statement, "There are 628 squirrels living on campus," describes the ________ of squirrels on campus
A) species B) community C) population D) ecosystem