Drosophila melanogaster have four pairs of chromosomes. a. what is the ploidy level at metaphase ii of meiosis? a. 8n b. 1n c. 4n d. 2n e. 0n b. what is the ploidy level at prophase of mitosis

What are two reasons for why a species might disappear from the fossil record?

Step 1 review the imaginary strand of dna below. note the complementary base pairs. a g c a a t c c g t c t t g g t c g t t a g g c a g a a c c step 2 to begin replicating this strand of dna, draw the two sides of the strand separating. step 3 now, draw the free-floating bases linking up with the separate sides. remember to follow the rules of complementary base pairing. step 4 draw the two resulting dna strands.

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land