Which is an example of a chemical change that occurs during weathering? A. freezing and thawing of water in the cracks of rocks
B. Animals dig a hole in the ground looking for worms
C. flowing water smooths rock surfaces in a river
D. Acids from the lichens growing on the rock breaks down the rock to soil

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

Which level of taxonomy has the fewest organisms?