During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

Which is the best example of plant tissue? the answer is d (just took the test)

Which organ controls breathing? lungs alveoli heart diaphragm