The purple sea pen is an unusual colonial marine cnidarian that bears a striking resemblance to an old-fashioned feathered quill pen. To which phylum does the purple sea pen belong?

a. Scyphozoa
b. Cubozoa
c. Anthozoa
d. Hydrozoa


c. Anthozoa

Biology & Microbiology

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The general term for disorder associated with decreased oxygen delivery by blood is ____

a. malaria b. leukemia c. mononucleosis d. anemia e. toxemia

Biology & Microbiology

In lactation, milk production is stimulated by _______, while milk release is stimulated by ___________.

A. oxytocin, prolactin B. progesterone, oxytocin C. prolactin, oxytocin D. prostaglandin, oxytocin E. progesterone, prolactin

Biology & Microbiology

What is the effect of surrounding a gene with insulators?

What will be an ideal response?

Biology & Microbiology

Sedimentary rocks collected from southwestern Greenland suggest the Earth is roughly ________ billion years old

a. 1 b. 4 c. 10 d. 16

Biology & Microbiology