Which three types of RNAs are found in both prokaryotes and eukaryotes?
What will be an ideal response?
mRNA, tRNA, and rRNA
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Which of the following most accurately describes spore production in ascomycetes?
A. Within each ascus, the zygote undergoes meiosis followed by mitosis to produce eight spores. B. Within each ascus, the zygote undergoes mitosis followed by meiosis to produce eight spores. C. Within each ascus, the zygote undergoes two rounds of mitosis to produce eight spores. D. Within each ascus, the zygote undergoes mitosis to produce four spores. E. Within each ascus, the zygote undergoes meiosis to produce four spores.
About 25 million years ago, the anthropoids that remained in Africa gave rise to two lineages, the Old World monkeys and the
A. New World monkeys. B. apes. C. first primate. D. hominoids.
Fins composed of rod-shaped bones surrounded by thick layers of muscle are characteristic of
A) lobe-finned fishes. B) ray-finned fishes. C) lampreys. D) cartilaginous fishes. E) hagfishes.
When calculating the sample variance of a random sample, you divide the sum of the squared deviations (from the sample mean) by N - 1 instead of N to ensure the estimator achieves what property?
A. Unbiasedness B. Minimum variance C. Squared loss D. Efficiency