Flatworm parenchyma cells that are stem cells: a. pigment  b. fixed parenchyma cells c. neoblasts cells  d. neural crest cells  e. chromatophores

Plants develop from stem cells called O A. blastocyst B. meristems C. embryonic stem cells D. adult stem cells

Which of the following is NOT true when comparing epithelial and mesenchymal cells. A) Epithelial and mesenchymal cells differ in their DNA content. B Epithelial and mesenchymal cells secrete different types of extracellular matrix molecules. C Epithelial cells are stationary whereas mesenchyme cells are motile. D Mesenchymal cells can invade tissues to form organs in new places. E) Epithelial cells express a different type of cadherin than mesenchymal cell.

What do you call a finger-like projection that arises from epithelial layer in some organs that helps to increase surface area allowing for faster and more efficient adsorption? A. cillia B. flagella C. microvilli D. villi Cell modification is the change in the structure of cell to carry out specialized function. Which of the following words will BEST describe the cell modification? A. alteration B. differentiation C. evolution D. mutation You learned that cells are structurally modified so that they can perform their function efficiently and effectively. Which of the following structures have specialized functions due to cell modification? I. Guard cells II. Haemoglobin Trichomes Xylem vessels III. IV. A. 1, II and III B. I, II and Iv C. I, III, and IV D. I, II, III and IV Which of the following statements best illustrate the adaptation and function of nodified cell? A. The xylem in the leaf helps the leaf to be positioned horizontally towards the sun. B. The hair-like structure in…

Which of the following does not play a role in the formation of a blastocoel? A. Osmosis B. Apoptosis C. Tight junctions D. Sodium

Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell?   a. As cells develop, signaling pathways can cause some genes to be turned off during development.   b. Adult cells have different DNA content than do embryonic stem cells.   c. Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells.   d. It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.

3) Explain giving appropriate reasoning why the neoblasts are considered the following a. A stem cell: b. Pluripotent c. Neoblasts are the only dividing cells in the planarians body-Is this statement true or false? Justify with reasons. d. Discuss the role of neoblasts in the planarian regeneration. What would happen if all except ONE neoblast was killed by irradiation? Would the planarian be able to regenerate and build the neoblast population? e. What role do neoblasts play in the maintenance of the planarian anatomy?

Bicoid is normally found at one end of a fly egg.  A defective form of bicoid results in an embryo with two tail ends.  If the normal form of bicoid was placed at both ends of an egg what would be the result? Group of answer choices A. a normal larva B. a fly with body parts in the wrong regions C. an embryo with two tail ends D. an egg with no cell division E. an embryo with two head ends

The products of budding are a. two cells of equal size. b. two cells, one of which is smaller than the other. c. many cells of equal size. d. many cells of variable size.

Which of the following is a characteristic of a cell undergoing cellular senescence? a.Doubling in physical size b.Production of SASPs c.Atypically low NGF1-A levels d.Abnormally high rate of proliferation