Why are photosynthetic organisms called producers in an ecosystem?

Secondary succession occurs in ecosystems without soil.

Emily wanted to see what battery lasted the longest. She put each battery into a clock and recorded the time that the clock stopped. She used Duracell, Energizer, Kroger bran, and EverReady. What is the control variable and the contstants?

What is a eukaryotic cell?

At a depth of 50 m below sea level a human will experience a pressue of how many atmosphere

After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the reproduction of the are?

What organelle moves proteins and other substances through the cell

Different between animal cells and plant cells?

The statement force equals mass times acceleration is newton's second law of motion why is this a law than a theory?

What are fluid dynamics

The nurse is preparing to apply nitroglycerin paste. after checking the order, washing hands, checking the client's identity, and applying gloves, which is the next nursing action?