Question 17 of 25 A cactus can either have long needles (L) or short needles (1). A cactus
grower crosses two cacti. The cross is shown in the Punnett square below.
LL
LL LL
ULI
What is the phenotype ratio for this cross?
O A. One long, three short
B. Four long, zero short
O C. Two long, two short
O D. Three long, one short
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The punnet square in this question is unclear. The punnet square has been attached as an image.

Based on the punnet square, the answer is C. Two long, two short

Explanation:

This question involves a single gene coding for needle length in cactus plant. The allele for long needle (L) is dominant over the allele for short needle (l).

According to the question, two cacti were crossed with genotypes Ll and ll respectively. The following allelic combinations of gametes will be produced by each parent

Ll- L and l

ll- l and l

Using these gametes in a punnet square (as seen in the image below), four possible offsprings with genotypes: Ll and ll will be produced in a 1:1 proportion.

Ll offsprings will be phenotypically long-needled while ll offsprings will be phenotypically short-needled. Hence, two long needle offsprings and two short needle offsprings will be produced in this cross.

thinking it would be d not too sure but i think it's right

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.