A new species of chordate is discovered. It produces a free-swimming larva that has a notochord and a nerve cord. The larva attaches to a surface and matures into a saclike adult that filter feeds. The notochord and nerve cord are not present in the adult. To what group of chordates does this new species belong?

echinoderms
jawless fish
lancelets
tunicates

the correct option is option d

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

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

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.