What approximate percentage of marine species was lost during the Permian extinction?
a. 40%–50% c. 70%–80%
b. 50%–60% d. 80%–90%
D
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List the similarities and differences between photorespiration and cellular respiration with respect to ATP production and utilization, and the requirement for and production of carbon dioxide and oxygen
What will be an ideal response?
How do carnivores and herbivores differ?
A. Carnivores must eat more frequently than herbivores. B. Carnivores and herbivores require different enzymes to digest their food. C. Carnivores can be opportunistic but herbivores cannot. D. Herbivores can be opportunistic but carnivores cannot. E. Herbivores remain herbivores at all stages of development, while carnivores are often herbivores in their larval stages.
The first cell of a new individual is the
a. blastula. b. gastrula. c. embryo. d. zygote. e. gamete
Which of the RNAs act as an enzyme?
a. mRNA b. rRNA c. tRNA d. mRNA and rRNA e. none of the RNAs act as an enzyme