He was studying genetics by performing mating crosses in pea plants. Then, he discovered that the traits in the offspring didn't always match the traits in the parental plants.
Answer:
Biological: 2) not applicable for extinct species.
Morphological: 3) relies on similarities of structures. The morphology studies the structures.
Phylogenetic: based in the history of the specie
Morphological and phylogenetic : 1) acommodates asexual reproduction and 5) species acceptance criteria can be subjetive
all three: 4) used by scientists in classification
The cells of the CNS are called neurons. They secrete neurotransmitters.
