<span>microtubules and microfilaments </span>
1. A !! Its Mesozoic era and Jurassic period !!
2.B !! Archaeopteryx led to evolution of birds as they are connecting link between birds and reptiles.
3.B !! Very popular to be known , dinosaurs extinct due to metroites collision !!
Circulatory system is the answer
Explanation:
yf8yfyf8yfy8f8yxidzezryxyixxutdt7dy8
Answer:
Animals takes oxygen inside their body from the environment in order to survive..
Explanation:
Animals takes oxygen inside their body from the environment and exchange of gases occurs in the organ such lungs where the cells loaded itself with oxygen and removed the carbondioxide from the cell. When the organism exhaled carbondioxide gas is released in the environment. Food is broken down in the digestive tract and nutrients is absorbed from small intestine which adds these nutrients into blood that is used by the cells. Kidney filters the blood and removes the nitrogenous waste and excess amount of water from the blood. This urine is removed with the excretory system of the body.
