Defenses which help reduce the chances of infection include .

ear wax, the skin, and saliva
hormones, stomach acid, and sputum
blood, hormones, and enzymes
saliva, enzymes, and protein

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Pls need ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)