Which evolutionary plant innovation eliminated the need for sperm to swim through water in order to fertilize an egg, resulting in plants being truly adapted for reproduction on land?
A) Independent gametophyte
B) Roots
C) Rhizoids
D) Pollen
E) Fruit
D
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Which of the following is not a fate of pyruvate within a cell?
A) fermentation B) anaerobic respiration C) gluconeogenesis D) alanine biosynthesis E) all of the above
A trait with a heritability value of 0.75 indicates that 75% of the phenotypic variability seen in the population is caused by ____ of the population
a. genetic differences b. environmental differences c. concordance d. epigenetic effects e. the equal contribution of the genotype and the environment
How do marine polychaetes use chitin hardened body parts?
a. as an excretory organ b. the chitin hardened tentacles, to move sand c. to chew and digest prey d. the chitin-hardened jaws, to capture prey e. the chitin-reinforced bristles, for movement and chitin hardened jaws to capture prey
One type of bacteria, called gram-negative bacteria, has a pyrogen molecule that is part of its membrane structure. This endogenous pyrogen is released when the cell is destroyed by the immune system
Why would a severe gram-negative bacterial infection be particularly dangerous to a patient?