Describe the difference between anagenesis and cladogenesis
What will be an ideal response?
ANSWER: Anagenesis is the pattern of gradual phyletic change. Speciation as a result of anagenesis does not increase biodiversity. Cladogenesis is an evolutionary pattern whereby an ancestral species undergoes speciation via divergence, two descendant species are produced, both of which are distinct from the common ancestor. Cladogenesis increases biodiversity.
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Which of the phylogenetic trees above best demonstrates cladogenesis?
A. Tree 1
B. Tree 2
C. Tree 3
D. Both Tree 2 and Tree 3
How does a prokaryotic cell differ from a eukaryotic cell?
a. A prokaryotic cell has no membrane-enclosed organelles. b. A prokaryotic cell has a plasma membrane. c. A prokaryotic cell contains organelles. d. A prokaryotic cell has a nucleus. e. A prokaryotic cell has DNA.
Is it possible to prevent bacteria from becoming resistant to antibiotics?
A) Yes: If we give antibiotics properly, resistance will go away and not evolve again. B) No: Bacteria need to become resistant to anything that will kill them. C) No: However, by using antibiotics properly, we can slow the rate at which resistance appears. D) Yes: If we stop using antibiotics, the trait will disappear.
Which structure of the reproductive system is treated as needing special protection during hemorrhage, much like the brain or heart?
A. Testes B. Placenta C. Vas deferens D. Prostate E. Ovaries F. Uterus