Scientists use a technique called to make multiple copies of DNA sequences. Scientists can also make by combining DNA from two different sources. One of the sources may be bacteria, which have circular DNA molecules called When bacteria undergo transformation, they can be identified by . 1. gel electrophoresis
DNA ligation
recombinant DNA
the polymerase chain reaction (PCR)

2. plasmids
polyploidy
messenger RNA
recombinant DNA

3. polyploidy
recombinant DNA
plasmids
telomeres

4. nucleotides
genetic markers
telomeres
polyploidy

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Ascientist is examinin the cell is disrupted when she damages one specific type of macromolecule g the function of macromolecules in a cell she notices that movenent of large molecules into and out of