If the cell is prokaryotic, there will be no nucleus present; prokaryotic cells have a cell wall, flagella, and pilus. Eukaryotic cells have a nucleus, no cell wall, and contain more organelles than prokaryotes; they are more complex.
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Answer:
A & B
Explanation:
Same amount of protons but different numbers of neutrons.
Grade means HAVING SIMILAR ADAPTIVE PATTERNS.
In evolution, a grade refers to a group of species that have similar traits (the trait could be morphological or physiological) and which has given rise to another group that possess major differences from the ancestral form.