Which of the following statements is always true about sister taxa on a phylogenetic tree? sister taxa are always defined by shared ancestral characteristics that have been modified in all other taxa in the phylogeny. sister taxa always share a most recent common ancestor that is not shared with any other taxon on the phylogeny. sister taxa are always the result of speciation events that result in two new genera. sister taxa are always the result of the most recent divergence event represented on a phylogeny.

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the