A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing which type of cell-to-cell signaling?

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#Question id: 32274

#Unit 2. Cellular Organization

Which of the following function is not related to smooth endoplasmic reticulum?

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#Question id: 28455

#Unit 5. Developmental Biology

Which of the following protein is function as concentration gradient manner in C.elegans?

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#Question id: 3497

#Unit 11. Evolution and Behavior

Which of the following is correct statement?

a. Sexual selection should operate more powerfully in polygamous than in monogamous species

b. Polygynous species should have stronger sexual dimorphism than in monogamous species

c. Male competition or male choice favors adaptations to polygynous mating in species

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#Question id: 2549

#Unit 2. Cellular Organization

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in which of the following organelles or structures?

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#Question id: 6987

#Unit 5. Developmental Biology

Which of the following statements about axon-guidance is TRUE?