Comparing a single-celled eukaryotic organism with a multicellular organism such as yourself identify the major difference from the list below.
a. Escape from predator
b. Finding a mate
c. Division of labor
d. Find its own food
e. Nucleus
Answer: c. Division of labor
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Hirudinea is the only class of annelids that contains:
A. species that are parasitic blood suckers B. species with a segmented body C. parapodia D. a gizzard E. a clitellum
When a molecule is heated, hydrogen bonds break readily. Which of the following describes how DNA will react if it is heated?
(A) The DNA will separate into individual nucleotides (B) The sugars will separate from the phosphates (C) The DNA will separate into 2 singles stranded sections (D) The DNA will remain intact
Homo sapiens have existed on earth for 2% of the earth's history.
Answer the following statement true (T) or false (F)
In general, the plant life cycle has evolved from ________ to ________
A) dominant gametophyte; dominant sporophyte B) dominant spore; dominant gamete C) dominant sporophyte; dominant gametophyte D) dominant gamete; dominant gametophyte E) dominant gamete; dominant spore