Pcr utilizes specific dna primers and a thermo stable polymerase enzyme to amplify (make many copies of) a particular dna sequence (typically 100-600 bases long). double stranded dna (dsdna) must first be separated and primers anneal (complimentary base pair to) their targeted sequences. polymerase can then extend the dna strands. what must also be added to the mixture besides primers and polymerase enzymes in order to have amplification of dna? a. atp.
b. rna polymerase.
c. dntps.
d. electron carriers.
e. dna repair enzymes.

What is a universal way that predation benefits the predator? predation increases mate availability. predation in defense of space. the predator gets the energy it needs to survive. the predator keeps parasites from hurting the species.

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane