Branching points at the root of the eukaryotic phylogenetic tree
A) reveal that unikonts are derived from the SAR clade
B) suggest that Archaeplastids were the first eukaryotes
C) strongly suggest that fungi are more closely related to plants than animals
D) are presently unclear
D
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Some microbes convert iron to magnetite which is then used as an internal compass to help position the microbe correctly in its environment.
Answer the following statement true (T) or false (F)
Sexual selection, such as occurs when males compete for access to fertile females, frequently influences aspects of body form and can lead to _____
a. male/female differences b. male aggression c. exaggerated traits d. all of these
A positive effect associated with pesticide usage does not include
a. killing disease-causing insects. b. killing some pathogens. c. increasing food supplies. d. increasing profits for farmers. e. causing cancer.
Both pH and temperature affect cells by altering proteins' tertiary structure
a. true b. false