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 general shape of the epithelial cells that are nearest
to the lumen in an empty urinary bladder is in multiple cell layers which are
considered to be a stratified tissue and the cells in it are shaped in terms of
the organ’s distention. This type of epithelial cell is the transitional
epithelium.
A fossil would from through mineral replacement by replacing the existing material of the animals bones with minerals, to become petrified. The Minerals will keep the fossil preserved longer.
