Question 13 This type of macromolecule can have two types of chains, satured and unsaturated.
Your
O carbohydrates
proteins
nucleic acids
O lipids
Clear answer

Lipid are present as saturated and unsaturated form..

Explanation:

But lipids are not true macromolecules as their molecular weight is not above 800 daltons, still they are considered macromolecules cuz they appear in acid insoluble fraction,, which is left as residue... as it forms vesicles which do not dissolve!!

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

tissue

explanation:

it is actually formed by geoup of cells which is tissue