Which of the following is true about the usage of public land?

a.
All public land is managed by the Bureau of Land Management (BLM).
b.
Only federally owned public land is considered protected.
c.
Public land can be protected or unprotected.
d.
State parks are considered unprotected public land.

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

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative