Amoebae move by crawling over a surface (pseudopodia), which involves _____. A) growth of actin filaments to form bulges in the
plasma membrane B) cilia C) reinforcing the pseudopod with intermediate filaments D) setting up microtubule extensions that vesicles can follow in the movement of cytoplasm
the answer is: A) growth of actin filaments to form bulges in the plasma membrane.
Explanation:
Amoebas are unicellular organism that can move on a surface using pseudopodia (false feet). This kind of movement is called amoeboid movement. The amoeboid movement is explained by the Sol-gel theory. The protoplasm of the amoeba is made of an outer gelatinous layer, and an inner portion made up of plasma sol. The sol-gel theory explains the contraction and relaxation events in the protoplasm of the amoeba that lead to the pseudopodia.
The modern theory of chemical evolution is based on the assumption that on a primitive earth a mixture of simple chemicals assembled into more complex molecular systems, from which, eventually came the first functioning cell(s).
Answer: net primary productivity is the amount of energy lost through respiration by producers SUBTRACTED From the gross primary productivity of an ecosystem
