Decomposers perform their recycling efforts on organisms
a. at the end of a food chain.
b. on the top of a pyramid.
c. that are producers.
d. that are consumers.
e. all of these.
E
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When did the ocean begin to form?
a. 200 million years ago b. 4.2 billion years ago c. 5 billion years ago d. 3.4 billion years ago
The concentration of the primary messenger (ligand) in the bloodstream changes from <10?9 M when the signal is not being secreted to 10?7 M when it is being secreted
Which of the following Kds for binding that ligand would be optimal for a receptor involved in a responsive signaling system? A) 10?10 B) 10?9 C) 10?8 D) 10?7 E) 10?6
Which lineage do salamanders belong to?
a. Gymnophiona b. Aves c. Urodela d. Anura
________ were the first class of DNA sequence polymorphisms discovered in the human genome
A) SNPs B) Microsatellites C) VNTRs D) STRs E) RFLPs