According to the cladogram, arthropods are MOST closely related to which group of organisms? mollusks. annelids. echinoderms.
Answer:
it affects the hardness of the shells because calcium has a high reactivity which causes the shell to be hard
Explanation:
I want to say individuals more so than entire populations. That being said it's because the entire populations of living things are able to evolve and move forward through slow evolution.
Cell, DNA, chromosome, gene
In order of decreased size
