Which protein serves as a chemical messenger?

hemoglobin

actin

myosin

insulin

Antibiotics are choose one: a. two of the above b. effective against all pathogens. c. sometimes overprescribed. d. only effective against viruses. e. usually human made.

The following chart shows the Baffin Bay high and low tide heights for four consecutive days. Describe the changes in the heights of the high and low tides from Monday morning to Thursday night.

What would be the consequence of absence of tRNA in the cytoplasm? A. The function of tRNA would be taken up by rRNA and protein systhesis would continue. B.

What are the two main stages of cell division? What are the two main stages of cell

The bud shown in the diagram below was produced by asexual reproduction? which process is responsible for the formation of the bud?

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?