Okay for this..it has 2 questions so answer them and hopefully give the correct answer! you

1.trey and connie were raising pigs for their 4-h project. the students fed their piglets a variation of two feed: wheat and corn. after two months they tabulated the pigs' weight gain. what relationship is apparent from their data?

side note: the chart is part of question 1!

a) the blend of wheat and corn had no relationship to weight gain.

b) the lower the percentage of corn in the feed, the greater the weight gain.

c) the higher the percentage of corn in the feed, the greater the weight gain.

(d) the higher the percentage of wheat in the feed, the greater the weight gain.

2. which fossil most likely represents the oldest form of life?

side note: second picture represents second question! ; )

a) fossil #1

b) fossil #2

c) fossil #3

d) fossil #4

trachea, alveoli, lung capillaries, arteries

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.