Answer:
D.
holds the bones of the skeleton together
Explanation:
Avoid carcinogens (like smoking residues..etc), eat healthy and sleep well in order to maintain a strong immune system
<span>chordates are the animals which are in phylum chordata and have backbone
</span>The trait that is ancestral to all chordates is <span>a vertebral column that is backbone
so option D is correct
hope it helps</span>
The biological macro molecule is CARBOHYDRATE.
Carbohydrates are made up of just three elements, which are carbon, hydrogen and oxygen, all joined together in a ringed structure. The number of carbon a carbohydrate has determined the class of carbohydrate under which it is grouped. The particular one we are given in this question has five carbon, so it is a pentose sugar.
Carbohydrate are the major source of energy in the living cells.
It is paramecia, euglenas, and mold. These are all unicellular, eukaryotic organisms.
