Use the drop-down menu to answer each question. Where do scientists find pollen grains to study ancient climate change?

What attribute of the pollen grains helps scientists identify the types of plants they belonged to?

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.