Which of the following is false?
a. Flowers often exhibit coevolution with their
pollinators.
b. Seeds often exhibit coevolution with their
disseminators.
c. The pollen grain forms from a haploid
microspore.
d. Megaspores are part of the female gametophyte
generation.
e. Megaspores and microspores arise through
mitosis.
Answer: e
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The commensal Neisseria spp. are often confused with pathogenic gram-negative diplococci. A simple test utilizing a blood agar plate and an antibiotic disk resulting in elongation of the cells assists in the differentiation of these organisms. Which antibiotic disk is utilized in this applica-tion?
a. Cephalosporin b. Vancomycin c. Penicillin d. Metronidazole
Root nodules are swellings on some plants that contain mutualistic __________ bacteria. Fill in the blank(s) with the appropriate word(s)
Outside the protein sheath, many viruses have a(n) ________ made of protein, lipid, and carbohydrate.
Fill in the blank(s) with the appropriate word(s).
How many sperm nuclei are necessary for the successful fertilization of flowering plants?
What will be an ideal response?