Answer:
Identify how the physical barriers of the immune system protect the body against pathogens?
skin contains tightly packed cells
•skin is tough, flexible, and waterproof
Explanation:
Answer:
Photoautotroph"" means:
light self-feeder.
Explanation:
Photoautotroph has three words embedded in one
photo= light
auto= self
troph= feeding pattern
therefore, it means light self feeder
carbon's atomic number is =6
oxygen's atomic number is=8
potassium's atomic number is=19
arsenic's atomic number is=33
lodine atomic number is=53
calcium's atomic number is=20
boron's atomic number is=5
neon's atomic number is=10
protons
carbon=6
oxygen=8
potassium=19
arsenic=33
lodine=53
calcium=20
boron=5
neon=10
electrons
carbon=6
oxygen=8
potassium=19
arsenic=33
lodine=53
calcium=20
boron=5
neon=10
groups of the elements
carbon group 6
oxygen group 14
potassium group 1
arsenic group 15
lodine group 17
calcium group 2
boron group 5
neon group 18
valence electron
carbon 2;4
oxygen 2
potassium 1
calcium 2
boron 3
neon 0
lodine 1
cation or anion
c-
o+
k+
ca+
l-
b3+
ne+
as+
Answer:Cells are organized into tissues; and tissues form organs. Organs are organized into organ systems. Example like your muscular system.
Explanation:
