Which of these is an advantage shared by early plants that invaded land?
A) Fewer predators
B) Increased sunlight availability
C) Increased support against gravity
D) A and B
E) All of the above
D
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When several possible phylogenetic trees can be produced from a data set, the most parsimonious tree:
A. is the one that shows the smallest number of evolutionary changes. B. is the one that shows the largest number of nodes. C. is the one that shows the largest number of analogous characteristics. D. is the one that shows the smallest number of synapomorphies. E. is the one that shows the smallest number of branches.
Because Amanda has cystic fibrosis, she is a frequent patient at her local hospital due to lung
infections. On one visit, she was infected with P. aeruginosa. In her lungs, these bacteria secrete a protective substance that forms a layer over the bacteria. This layer is likely a(n) __________.
a. biofilm b. histamine c. antimicrobial protein complex d. complement toxin
The ability to tolerate lactose throughout life most likely arose in ________
A) populations that live in cold climates B) populations that live in wet climates C) cultures that keep dairy herds D) Native Americans
this image shows a sagittal section of the male R.S. what does 3 represent?
What will be an ideal response?