What two characteristics found within the green algae are clues that this group of organisms is more closely related to the land plants than red algae?
What will be an ideal response?
They both have photosynthetic pigments and stored carbohydrates, which are the same.
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An epitope is _____
A) part of the interferons that penetrate foreign cells B) a protein protruding from the surface of B cells C) two structurally similar antibodies dissolved in the blood plasma D) the part of an antigen that actually binds to an antigen receptor E) a mirror image of an antigen
Which of the following is a key feature of chordates?
a. having a notochord in the embryonic stage b. possessing many rows of tube feet c. having thin arms that lack organs d. engaging in intracellular digestion
Tear ducts pass between which two bones?
a. maxilla and sphenoid b. sphenoid and ethmoid c. nasal and lacrimal d. lacrimal and zygomatic e. lacrimal and maxillary
Defining characteristics of chordates are
What will be an ideal response?