What do all multicellular organisms need for sexual reproduction to occur?
a.
pollen
b.
spores
c.
seeds
d.
gametes

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

This question is only for applicants to scholars for medicine or scholars for dental medicine: what aspects about medicine (or dental medicine) intrigue you? describe how these aspects influence your life. (100-650 words)

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?