The stage of the cell cycle during which the cytoplasm divides to form two cells is called:
A. G1
B. S
C. G2
D. Mitosis
E. Cytokinesis
E. Cytokinesis
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What is the infective form of Entamoeba histolytica and Giardia intestinalis?
A) cysts B) trophozoites C) merozoites D) sporozoites
The surface receptors that recognize and bind signaling molecules are ____
a. glycoproteins b. glycolipids c. phospholipids d. promoters e. ligands
In the year 2317, a group of human pioneers decide to colonize Mars. The distance between Mars and Earth prevents the possibility of new members joining the colony or the members of the colony interbreeding with humans on Earth
This situation is an example of A) extinction. B) the bottleneck effect. C) random mutation. D) continental drift. E) the founder effect.
One day after a biology class four of your friends argue about the difference between phylogeny and systematics. Which friend is right?
A. Friend A states that systematics and phylogenies are really the same, one is more recent than the other, but basically they are the same. B. Friend B says that systematics is the same as cladistics and cladistics is reconstructing clades, which ultimately lead to the development of phylogenies. C. Friend D says that the way she remembers is that systematics is the reconstruction and study of phylogenies. D. Friend C argues that systematics is the actual collecting and cataloguing of specimens into museums that can be used later by scientists to construct clades and phylogenies.