Some parasitic plants are spread from one plant to another by direct transmission
Indicate whether the statement is true or false
TRUE
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When you look at a phylogenetic tree of reptile classes, turtles, lizards and snake, and crocodiles are grouped together and birds are set off to the side but with a common ancestor for both groups. This would
A. be a monophyletic tree. B. be a paraphyletic tree. C. be a polyphyletic tree. D. have the taxonomy wrong because birds should be included with the others to make it a monophyletic tree. E. be a paraphyletic tree but the taxonomy wrong, because birds should be included with the others to make it a monophyletic tree.
The movement of actin and myosin fibers in a muscle contraction contains all of the following steps EXCEPT
A. the myosin head attaches to the actin filament. B. the globular myosin head detaches from the actin filament. C. myosin rolls up from one end, forming a ball. D. the myosin head returns to its original conformation. E. the myosin filament advances relative to the actin filament.
Thin films of bacteria that have been air-dried onto a glass microscope slide are called ________.
Fill in the blank(s) with the appropriate word(s).
Four of the following were likely in Earth's earliest atmosphere. Which one was not?
a. hydrogen b. nitrogen c. oxygen d. carbon dioxide e. water vapor