Answer: dinosaurs and birds
Plentiful collection of f<span>ossils of early birds and their most immediate predecessors has settled the century-old controversy about the origin of birds. Birds are now safely declared to evolve from a group of dinosaurs known as maniraptoran theropods. Birds have similar shape of the bones as a variety of maniraptorans have. A host of fossils have shown also that the maniraptorans lay looked alike eggs as that of birds and they resemble the birds in the way they laid their eggs also. Those reasons prove that they are most closely related.</span><span>
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Answer:
They don't reproduce independantly but have to invade other cells.
Explanation:
Changes in the dna are called mutations. They can occur spontaneously. Mutations can only be passed down in gametes--sperm and egg cells. with Darwins theory at mind a mutation needs to pass the test of natural selection to remain in the gene pool. So purposly making mutation or altercations may end in diseases/illnesses or in some cases death because they body can not take it.....hope this helps if it doesnt im sorry!
It is problematic due to antibiotic-resistance that would
occur. This extensive use and abuse of antibiotics result in the emergence of resistant
strains of bacteria. Some types of
bacteria that cause serious infections in humans have already developed
resistance to most or all of the available treatments, and there are very few
promising options in the market.
B is the answer for your question
