The term ____________________ refers to the relaxation phase of the cardiac cycle. Fill in the blank(s) with the appropriate word(s)
ANSWER: diastole
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A broad land or ocean region defined by climate,
geography, and producers is called a. an ecoregion. b. a hot spot. c. a realm. d. a habitat island. e. the biosphere.
The breakdown of which of the following leads to the self-destruction of the cell?
A. polysome B. lysosome C. microsome D. centrosome
In the lab, you show that guppies under different predatory conditions change in rapid evolution. In the field, you wish to design an experiment that would generate data to support your observation. What experiment would best help you achieve your goal?
A. Transfer wild guppies from a predator-free pond into one with predators but no guppies; over time observe the guppies for physiological changes. B. Place predators from the lab into a pond free of other predators but with wild populations of guppies and monitor changes in physical traits. C. Create a mixed population of wild guppies and place them into a controlled environment with predators to record the genetic changes. D. Use the guppies from the lab and introduce them into a predator-rich pond free of wild populations of guppies; observe trait changes.
Children born with Down syndrome have inherited an extra chromosome, so their diploid number is 47 rather than 46 chromosomes. What is this genetic condition called?
A) haploid 21 B) trisomy 21 C) triploid D) monoploidy