Flies
chelicerates
hexapods
arachnids
crustaceans

The correct answer is B. Hexapods

Explanation

Hexapods are insects belonging to a subclassification of arthropods, which have particular physical characteristics such as a body composed of three sections (head, thorax, and abdomen) and six legs, three on each side. Also, they are classified depending on their diet into three groups: chewers, choppers, and suck. finally, they are classified into terrestrial and flying groups. Flies have a body composed of three sections (head, thorax, and abdomen) and six legs, so flies are hexapods. So, the correct answer is B. Hexapods.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

about 40,000,000 results (0.81 seconds)  

search results

what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.