What is structure 2, and how does it sustain life?
a.
structure 2 is a chloroplast, which is the site of photosynthesis.
b.
structure 2 is the nucleus, which serves as the control center of the cell.
c.
structure 2 is the cell membrane, which controls what enters and leaves the cell.
d.
structure 2 is the cytoplasm, which contains organelles and is the site of many cell processes.

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.