D. DNA
All organisms contain dna
Answer:
In all different levels of the food webs and food chains, it is seen that damaged members of the prey have become easy food for the predators.
Explanation:
Preys can identify the other members of their species are injured or wounded or fed by the predators by their body fluid in as if a predator eats the prey the blood or other body fluid releases. These fluids or blood help individual prey species to be aware of the predator as they recognize that their species member is wounded or consumed by there olfactory receptors.
There are several other chemicals cue that is species specif that are released by the prey to alarm the other species member by injured or dead members.
Thus, the correct answer is - In all different levels of the food webs and food chains it is seen that damaged members of the prey have become easy food for the predators.
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Answer:</h2>
The weak acid <u>D) acetic acid</u>.
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Explanation:</h2>
Acid are the substance which has pH below 7 and releases 
ions when they are treated with aqueous solution. Based upon the rate of dissociation, the acids are classified as strong acids which has high dissociation rate and weak acid with low dissociation rate.
Acetic acid is a organic acid with the formula 
. It is a colorless acid and also named as ethonoic acid.
Among the given list of acid in the option which includes, Sulfuric acid, Nitric acid, Hydrochloric acid, and Acetic acid, first three are strong acids, whereas the lastly mentioned is a weaker one.
