A variable that is held constant in order to assess or clarify the relationship
Neuron- sends message from brain to move up.
Erythrocyte- keeps tissues involved alive, provides oxygen for energy for motion.
Leukocyte- keeps the tissues involved free of disease.
Muscle Fiber- causes the actual contraction of muscles to raise leg
Answer:
A) All three have similar biotic and abiotic features.
Explanation:
The similarities which exist between the temperate rainforest, temperate seasonal forest, and woodland biomes are the presence of biotic and abiotic factors. Biotic feature is the living part of the environment while abiotic factors are the non living part of environment. There are variation present among these forest about temperature and precipitation due to their presence on the different parts of the world.
Answer:
9. organelles
10. cells--> tissues--> organs--> systems
B. Excretory system. Think of it helping things to EXIT your body
