The foxglove plant, seen in the illustration, produces very toxic chemicals that can cause serious illness and death in any organisms that eats the plant. why do scientists think the foxglove plant evolved such powerful poisons?
a) the poisons function to kill invading bacteria and other pathogens that may harm the plant.
b) the poisons maximize the efficiency of the photosynthetic process, allowing the plant to make more food.
c) the poisons discourage any animal from eating the plant, preventing damage to the plant from herbivores.
d) poisons are likely to be the product of genetic mutations in the dna of the plant and do not have any useful function.

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

How does food concentration affect yeast activity

The starting materials in a nuclear change have a total mass of 2.3465 x 10-27 kg. after the change, the resulting materials have a mass of 2.3148 x 10-27 kg. how much energy was released during the change? 2.85 x 10-12 2.08 * 10-10 j 0 211 * 10-10 j 8.56 * 10-43