Answer the following question given this paragraph:   In the predator-prey example, one factor limits the growth of the other factor. As the prey population decreases, the predator population begins to decrease as well. The prey population is a limiting factor. A limiting factor limits the growth or development of an organism, population, or process.   Q: What limits the growth or development of an organism, population, or process?   Choices:  - decreasing factor  - limiting membrane  - mutation factor  - limiting factor  A:
limiting factor
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Answer the following question given this paragraph:   Seminiferous tubules can be seen in a cross section of a testis pictured in Figure below . The tubule is lined with spermatogonia, which are diploid, sperm-producing cells. Surrounding the spermatogonia are other cells. Some of these other cells secrete substances to nourish sperm, and some secrete testosterone, which is needed for sperm production.   Q: What is secreted by the cells surrounding spermatogonia to help sperm production?   Choices:  - estrogen  - dihydrotestosterone  - follicle stimulating hormone  - testosterone  A:
testosterone
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Answer the following question given this paragraph:   CHAPTER SUMMARY 20.1 Organizing Life on Earth Scientists continually gain new information that helps understand the evolutionary history of life on Earth. Each group of organisms went through its own evolutionary journey, called its phylogeny. Each organism shares relatedness with others, and based on morphologic and genetic evidence, scientists attempt to map the evolutionary pathways of all life on Earth. Historically, organisms were organized into a taxonomic classification system. However, today many scientists build phylogenetic trees to illustrate evolutionary relationships.   Q: Each group of organisms went through its own evolutionary journey, called what?   Choices:  - anomalous  - zoology  - superfamily  - phylogeny  A:
phylogeny
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Answer the following question given this paragraph:   Figure 29.2 All chordates are deuterostomes possessing a notochord.   Q: All chordates are deuterostomes possessing a what?   Choices:  - zygote  - hydrochord  - endoderm  - notochord  A:
