Many biologists feel that the first self-replicating organic systems were
a. types of RNA.
b. forms of DNA.
c. based on proteins.
d. formed in space.
e. plants.
A
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The members of this lineage of Cnidarians exist only as polyps as adults. Many build calcium
carbonate exoskeletons and have a mutualistic relationship with photosynthetic protists
a. Hydrozoa b. Scyphozoa c. Trematoda d. Cubozoa e. Anthozoa
You are given a piece of connective tissue that you observe to be white, firm, and consists of a matrix of collagen. When chemically analyzed, it is found to contain high concentrations of minerals. What kind of connective tissue is this?
A. bone B. cartilage C. adipose D. dense connective E. blood
The Haldane effect describes the increase in the affinity of hemoglobin for CO2 in the presence of a lowered
A) pH. B) PCO2. C) concentration of bicarbonate (HCO3-). D) temperature. E) PO2.
The organic material found in topsoil is called (humus/peat/compost)
What will be an ideal response?