I just don't know what each one is Stimulus: Ca2+ ion levels in blood are too low
•Sensor: •Control center:
•Effector and action(s):
•Negative feedback:

•Stimulus: Ca2+ ion levels in blood are too high
•Sensor:
•Control center:
•Effector and action(s):
•Negative feedback:

15 points come and ! which characteristic describes all bacteria? a rod-shaped b microscopic c multicellular d autotrophic

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

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