I think the hydra lacks the specialized cells for touch and chemical detection. On the other hand earthworms have touch, light, vibration and chemical receptors along the entire body surface. Both of them are invertebrates (those animals without a backbone), they include insects, worms, jelly fish, spiders among other animals.
I believe it is the lungs.
That trait would be said to exhibit incomplete dominance, an example would be a red and a white flower being crossed to make a pink flower
C a dog pants after running in the park
Answer:
DD Dd dd
Explanation:
so the answers above are the simplest traits a dominant + recessive trait can produce