#Question id: 1330
#Unit 4. Cell Communication and Cell Signaling
Which of the following are mineralized biological structures/mateials? Please select all that apply.
a) Glycosaminoglycans
b) Bone
c) Pectins
d) Diatom cell walls
#Question id: 807
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following forces can stabilize a normal DNA double-helix?
#Question id: 10873
#Unit 10. Ecological Principles
Allelopathy is a form of ________ competition.
#Question id: 9207
#Unit 9. Diversity of Life Forms
Loss of biodiversity matters not only with regard to mammals or other vertebrates, but also microbes. Why are microbes worthy of discovery and protection from extinction?
#Question id: 9163
#Unit 9. Diversity of Life Forms
Use the following figures to answer the question below
Based on the data in the figures, which of the following statements are correct?
I) Area 1 would be considered a desert because of its high average temperature.
II) Area 1 has more average precipitation than Area 2.
III) Area 2 would be considered a desert because of its low average precipitation.
IV) Area 2 has a larger annual temperature variation.