5. a diploid plant cells has 2.5 billion base pairs of dna (2.5 x 109). each nucleosome encompasses about 200 bp of dna (~145bp of dna wrapped around histone core, ~20 bp of dna associated with the h1 protein, and another ~35bp of linker dna). a) how many nucleosomes are present in the cell? b) give the number of molecules of each type of histone protein (h1, h2a, h2b, h3 and h4) associated with the genomic dna.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.