Lactose intolerance is the result of

a. drinking high-fat milk.
b. eating a large amount of yogurt.
c. low lactase activity.
d. a high-fiber diet.


c. low lactase activity.

Biology & Microbiology

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The plant cell wall network is comprised of all of the following except

A) hyaluronate. B) cellulose. C) extensin. D) hemicellulose. E) pectin.

Biology & Microbiology

Which of the following statements about plant macronutrients is/are true? Check all that apply.  

_____  They approach or exceed 1% of a healthy plant's dry weight. _____  They reduce the need for CO2 during photosynthesis. _____  A deficiency in any one can have severe effects on a plant's growth. _____  They can have important implications for human nutrition. _____  The ability of the plants to take up minerals is affected by soil pH.

Biology & Microbiology

The contribution an individual makes to the gene pool of the next generation compared to the contributions of other

individuals is called ____.

a. competition b. genetic drift c. relative fitness d. gene flow e. mutation

Biology & Microbiology

Viroids

a. are more complex than viruses b. have large DNA genomes c. encode their own polymerase for nucleic acid replication d. cause diseases in plants e. infect animal cells

Biology & Microbiology