Positive feedback differs from negative feedback in that one: a. positive feedback systems have only effectors, whereas negative feedback systems have only receptorsb. the positive feedback's effector responses are in the same direction as the initiating stimulus rather than opposite of itc. positive feedback loops are more frequently encountered in the control of homeostasisd. positive feedback benefits the organism, whereas negative feedback is detrimentale. the effector's response increases some parameter (such as body temperature), whereas in negative feedback it can only decrease the parameter

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.