When a group of cells work together, such as in bones, muscles, or nerves, they are known as

How does the insulin receptor differ from the erythropoietin receptor? a. Upon binding its signal molecule, the insulin receptor has two-fold symmetry, while the erythropoietin receptor does not. b.

Match the following. 1. a sequence of sugars, phosphates, and nitrogenous organic basesnucleic acid2. a complex molecule containing the genetic codeRNA3. a nucleic acid that participates in the synthesis of proteinsDNA

Scientists have evidence that the Antarctic Bottom Water is becoming fresher and warmer. What are two changes that could happen as a result of this?

Which of the following is not a characteristic of a living thing

Which of the following organisms arose during the Mesozoic Era? a. mammals c. insects b. birds d. salamanders

Protists use cilia to move within their habitat, but ciliated human cells like those in the bronchi are always anchored to one another and to an extracellular matrix; what benefit does cilia provide these cells?

Which of the following concepts promotes development in both piaget's cognitive development in both paigets cognitive development theory and eriksons psychosocial theorory

Brian made this table to organize his notes on changes of state change of state energy change melting gain freezing lose deposition gain condensation lose

What is the name of the type of cell division that occurs in the prokaryotic cell cycle?

Select the correct answer. Why is it difficult for scientists to find fossils from the Precambrian period?