The F2 phenotypic ratio of a monohybrid cross is
a. 1:1.
b. 2:1.
c. 9:3:3:1.
d. 1:2:1.
e. 3:1.
E
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A three-hectare lake in the American Midwest suddenly has succumbed to an algal bloom. What is the likely cause of eutrophication in freshwater ecosystems, such as this one?
A) increased solar radiation B) introduction of non-native tertiary consumer fish C) nutrient runoff D) accidental introduction of a prolific culture of algae E) iron dust blowing into the lake
When chemoreceptors detect a slight decrease in pH, this means that __________ concentrations have
increased, and the breathing rate must __________. a. carbon dioxide; increase b. carbon dioxide; decrease c. oxygen; increase d. oxygen; decrease e. chloride; decrease
__________ behavior is altered by experience.
Fill in the blank(s) with the appropriate word(s).
The endosymbiont theory is support by several lines of evidence one of which is ________
A) the chloroplast genome resembles the genome of the mitochondria B) mitochondria, chloroplast, and bacteria all have circular chromosomes C) both mitochondria and peroxisomes have circular chromosomes D) both bacteria and lysosomes have degradative enzymes E) both mitochondria and chloroplasts generate ATP