Quincy and Leon are comparing sponges and cnidarians. Quincy says that spicules in sponges are similar to stinging cells in cnidarians. Leon disagrees. Which best explains who is correct? Leon is correct, because sponges have stinging cells and cnidarians have spicules. Leon is correct, because spicules help sponges during reproduction and stinging cells are not involved in reproduction. Quincy is correct, because both spicules and stinging cells can be used to protect against predators. Quincy is correct, because both spicules and stinging cells can be used for stinging prey.

Isotopes of the same element have differ in their

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.

What process occurs during cellular development as the cell changes into a specific type of cell with specialized functions? a. binary fission b. fusion c. differentiation d. meiosis