________ form beneficial symbiotic relationships with plant roots
A) Basidiomycetes
B) Glomeromycetes
C) Chytrids
D) Zygomycetes
E) Ascomycetes
B
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Which of the following traits is not characteristic of earthworms?
a. true coelom b. closed circulatory system with five hearts c. clusters of neurons called nephridia that coordinate activities d. segmentation inside and out
A tRNA with the anticodon sequence 5? IUA 3? will not normally exist because
A) 5? UAA 3? is a stop codon. B) I is not a base present in tRNAs. C) it will recognize codons for different amino acids. D) 5? UAU 3? and 5? UAC 3? both specify tyrosine.
Which of the following organelles is NOT involved with protein synthesis?
A. The rough endoplasmic reticulum B. The Golgi complex C. The nucleus D. The lysosomes E. All of these organelles are involved in protein synthesis
Cancer can be caused by many different factors that all alter genetic information within a set of cells and cause uncontrolled cell division to occur. Which type of gene that causes cancer can be carried in a virus?
A) mutation B) tumor-suppressor gene C) carcinoma D) oncogene