2. The four nucleotides form hydrogen bonds with each other. a. What are the two bonding pairs?
b. Knowing what we know about antigens/antibodies and enzymes
do
you think these are the bonding pairs?

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.