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?

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

i need

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

what is this saying?