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Salivary amylase breaks down starch in your mouth. Amylase makes sure that the breakdown is accelerated. What is the term for a substance that speeds up the rate of a  chemical reaction?

Some diseases are caused by the improper functioning of specific cellular organelles. A patient exhibited crowding inside the cells due to the accumulation of old cellular organelles and engulfed particles. Most likely, the symptoms were due to a faulty _____.

In the following food chain, which organism is at the third trophic level? grass → rabbits → snakes → hawks

Trevon is a scientist and he finds some fossils of an extinct species of fish. Which of the following could he do by studying the fossils?

In which way are photosynthesis and cellular respiration different?

What is a major difference between facilitated diffusion and active transport?

What is the function of the organelle at A on this animal cell?  

Trace the path of the sperm through the female reproductive tract.

Mitosis forms ____________ cell products, while meiosis forms _________ cells.  

In plants, cytokinesis occurs with the formation of