Club mosses and horsetails have vascular tissue
Indicate whether the statement is true or false
TRUE
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Most members of this lineage of Cnidarians have both polyp and medusa stages in their life cycles,
with the polyp stage typically forming a colony. Species of Obelia are members of this lineage.
a. Hydrozoa b. Scyphozoa c. Trematoda d. Cubozoa e. Anthozoa
Phagocytosis is a form of ____
a. diffusion b. endocytosis c. exocytosis d. osmosis e. facilitated diffusion
Which of the following is not a type of proto-oncogene?
A. growth factor genes B. growth factor receptor genes C. the gene for cyclin D D. the gene for p53 E. the gene that codes for Ras proteins
Which of the following statements regarding cnidarians is true?
A) Cnidarians have three true tissue layers. B) The digestive and circulatory compartment of cnidarians is called the gastrovascular cavity. C) The more stationary cnidarian body form, which is cylindrical with a ring of tentacles, is the medusa. D) Cnidarians are herbivores and can be destructive grazers on seaweeds.