Biology, 28.11.2019 21:31, brandyjune9546
The regulation of gene expression in individual cells coordinates the development of multicellular organisms, ensuring that tissues and organs form in their characteristic places. researchers can study how multicellular organisms develop their spatial organization by examining normal and mutant forms of organisms, such as the fruit fly, drosophila.
select the four statements that are true.
1. homeotic genes establish major body axes.
2. cells receive molecular signals that communicate their position in relation to other cells.
3. differential gene expression affects the developmental process in animals.
4. pattern formation begins in adult animals.
5. homeotic genes code for transcription factors that control the development of segment-specific body parts.
6. positional information controls pattern formation.
7. the process of pattern formation involves segmentation of the body but does not involve the development of segment-specific body parts.
Answers: 1
Biology, 22.06.2019 11:20, webbhlharryteach
Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review
Answers: 1
Biology, 22.06.2019 12:50, cindy14772
The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above
Answers: 1
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