Through chemical digestion, polysaccharides are broken down into
A) fatty acids.
B) monosaccharides.
C) nucleotides.
D) amino acids.
Answer: B
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One of the important reasons for maintaining biodiversity is to
A. prevent loss of habitats that can be logged or farmed at some future date. B. prevent loss of habitat leading to edge effects. C. prevent introduction of invasive species. D. maintain the genetic diversity of wild relatives of common crops. E. prevent increased disease spread due to edge effects.
In heterosporous plants, megaspores form in ____ and give rise to ____
a. megasporangia; egg-producing female gametophytes b. megasporangia; sperm-producing male gametophytes c. microsporangia; egg-producing female gametophytes d. microsporangia; sperm-producing male gametophytes e. megasporangia; both egg-producing and sperm-producing gametophytes
The hard exterior of crabs and lobsters is:
a. chitin. b. triglycerides. c. glycogen. d. cellulose. e. based on wax polymers.
Based on estimates that consider the NPP of Earth and human use of these resources, what is the carrying capacity of people calculated by scientists?
A) 6.6 billion B) 10.6 billion C) 21 billion D) 40 billion