In fruit flies, the allele for vestigial wings is recessive to the allele for normal wings. in a generation of fruit flies, 18 males and 15 females with vestigial wings are produced, and 43 males and 44 females with normal wings are produced. which of the following is the best conclusion you can make about the parents of this generation? (2 points)
both parents were heterozygous for wing type.
one parent was heterozygous for wing type and the other was homozygous with normal wings.
both parents were homozygous with normal wings.
one parent had vestigial wings and the other was heterozygous for wing type.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.