A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?
The birds have similar body structure.
The birds have similar beaks.
The birds have different color variations.
The birds have different mating seasons.

The correct option is D) The birds have different mating seasons.

Explanation:

Organisms belonging to the same species will have the ability to reproduce and  produce fertile offsprings. As the birds have different mating seasons, this means that the birds are not able to mate and reproduce at the same time. Thus phenomenon supports the second student's argument.

The piece of evidence that supports the second student's argument, that the birds are different species, is the birds have different mating seasons.

Explanation:

A major characteristic of species is that its individuals (or sexes) can mate to produce fertile offsprings. The two birds populations have different mating seasons hence they are reproductively isolated by time difference in mating seasonality. Gene flow between two populations will, therefore, be hindered, which is a recipe for them to become different species over time - speciation.

chromosomes carry the genetic information for organisms. also, chromatin is the thread like dna which is located in the nucleus of an organism.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.