Karyogamy produces a _____.
a) diploid zygote
b) haploid zygote
c) spores
d) mycelium
e) hypha
Answer: a) diploid zygote
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Which of the following statements is most likely to be true in the case of the feedback-regulated enzymatic pathway shown?
Suppose you wanted to investigate ideas on how polymerization of prebiotic organic molecules may have occurred on the early Earth, which of the following scenarios might best be utilized for this?
A. Mix some RNA nucleotides in water and heat them to boiling temperatures. B. Mix some amino acids (protein building blocks) in water and add a strong acid or a strong base. C. Mix some RNA nucleotides in water and repeatedly wet and dry them on clay. D. Mix some amino acids (protein building blocks) in water and add a bacterium harmless to humans. E. Mix some amino acids in salt water and cool down to 0C.
Which of the following characteristics does the life cycle of the alga Ulva share with the life cycle of seed plants?
a. male and female gametes that look the same b. male and female gametes produced by mitosis c. sporophytes and gametophytes that look the same d. diploid spores e. fertilization in the open water
Gymnosperms are seed plants that produce seeds ____
a. inside ovules b. on the surface of ovules c. inside fruits d. on their waxy needles e. from a microspore