Lichens are mutualisms between
A. fungi and a green plant.
B. yeast and another fungi.
C. fungi and a mycorrhizae.
D. mycorrhizae and yeast.
E. fungi and an alga.
Answer: E
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The ? helix contains ______________ amino acids residues per turn. One full turn of the ? helix is ______________ long
A. 5.4, 3.6 Å B. 36, 54 Å C. 3.6, 5.4 Å D. 5.4, 1.5 Å E. 3.6, 1.5 Å
Codons are ____ that encode the information for a specific amino acid in a protein
a. made of two polynucleotide strands b. ribosomal subunits c. mRNA templates that are transcribed into tRNA d. post-translational templates of tRNA e. triplets of nucleotides in mRNA
Within the ocean, temperature gradients occur in the water column. Which best describes how temperature variations affect the nutrient levels at the surface?
A) Nutrients are decreased near the surface because upwellings force nutrient-rich water towards the warmer bottom and nutrient-poor water to the colder surface. B) There are always many more nutrients at the warmer surface than in the colder deeper water. C) The nutrient level at the surface is not affected by temperature variations. D) Nutrient levels at the surface increase because upwellings force nutrient-rich water from the colder bottom to the warmer surface.
In yolk-rich eggs, cytoplasmic localization of the yolk results in which of the following?
A. Yolk proteins concentrated at the animal pole B. More cuts in the yolky part C. Genetic material confined to the nucleus D. Fewer cuts during cleavage in the vegetal pole E. Reduced cytoplasm from the sperm