Chemical elements needed in trace amounts for biochemical reactions have a biogeochemical cycle, including boron, chromium, manganese, and cobalt.
Answer the following statement true (T) or false (F)
True
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This phylum of seedless vascular plants has about 1000 known living species, including those in the
genera Lycopodium and Selaginella. The gametophyte of some of these species cannot photosynthesize, and instead uses mycorrhizae to obtain nutrients
a. Hepatophyta b. Pterophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
Beach grass colonizing newly formed sand dunes is
A) primary succession. B) secondary succession. C) chronosequence. D) autogenic change.
Sentinel animals are monitored for specific diseases in order to determine the potential for human exposure to a disease.
Answer the following statement true (T) or false (F)
Organisms that are damaged by the normal atmospheric levels of oxygen (20%) but require oxygen at levels of 2-10% for growth are called ________.
A. facultative anaerobes B. microaerophiles C. aerotolerant D. anoxygenic