An ecologist studying effects of bees on seed production by flowering plants is working at which level of ecological complexity?
What will be an ideal response?
Communities
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Component of chlorophyll, activates many enzymes, divalent cation.
Choose the letter of the best match: A. nitrogen B. calcium C. potassium D. phosphorus E. magnesium
Given a sequencing reaction length of approximately 500 successive nucleotides, what is the absolute minimum number of sequencing reactions needed to determine the complete human genome, excluding overlap and redundancy?
A. 6.2 million B. 3.1 billion C. 6200 D. 12.4 million
Each nucleosome contains:
A. four proteins: H2A, H2B, H3, and H4 B. a histone octamer composed of two copies of each of the following proteins: H1, H2, H3, and H4 C. a histone octamer composed of two copies of each of the following proteins: H2A, H2B, H3, and H4 D. four proteins: SMC1, SMC2, SMC3, and SMC4 E. a mixture of histone and SMC proteins.
A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is
A. a codon B. an anticodon C. a promoter D. a terminator E. an amino acid attachment site