The diagram shows a plant stem.Where are the oldest cells found in this plant?A.In section C, where cell division takes placeB.In section A, where cell division takes placeC.In section C, where cell enlargement takes placeD.In section A, where cell differentiation takes placeSUBMITarrow_backPREVIOUS

Which action is taking place at the apical meristem of a plant stem?A.A cluster of tiny, unspecialized cells continuously divide.B.Mature cells differentiate into specialized cells.C.Cells die off and form a barrier that protects new cells.D.The plant's oldest cells rapidly divide to extend the stem.SUBMITarrow_backPREVIOUS

A is a type of meristematic tissue, during the elongation of stem, some cells of A left behind from A and they form B which responsible for the formation of C. Identify the A, B and CA–Intercalary meristem, B-Node, C-Flower budA-apical meristem, B-axillary bud, C-internodeA-apical meristem, B-axillary bud, c-branch and flowerA-lateral meristem, B-flower bud, C-branch and flower

Where are the stem cells located in this embryo?a) Inner cell mass b) Blastocoel c) Blastomeres d) Blastocyst

2.Which cells line the top of the leaf?

c) A student wanted to find out more about the cell cycle. The student made a slide of an onion root tip. She counted the number of cells in each stage of the cell cycle in one field of view. The table below shows the results.Stages in the cell cycleNon-dividing cells Stage 1 Stage 2 Stage 3 Stage 4 TotalNumber of cells209 4 2 1 36 Each stage of the cell cycle takes a different amount of time. Which stage is the fastest in the cell cycle? Give a reason for your answer. Stage _____________________ Reason ____________________________________________________________ ___________________________________________________________________ (2) Page 11 of 16the genetic material and subcellular organelles are duplicating and then are moving to oppositesides of the cell where the cytoplasm then then divides resulting in the formation of twodaughter cells. in photograph A the cell are beginning to form two genetically identical daughter cells but are still connected via a shared membrane(d) The cell cycle in an onion root tip cell takes 16 hours. Calculate the length of time Stage 2 lasts in a typical cell. Give your answer to 2 significant figures. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ Time in Stage 2 = ________________________ minutes (3) (e) Bacteria such as Escherichia coli undergo cell division similar to mitosis. Figure 2 shows a growth curve for E. coli grown in a nutrient broth. Figure 2What type of cell division causes the change in number of E. coli cells at P? ___________________________________________________________________ (1) Page 12 of 16(f) Suggest why the number of cells levels out at Q. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________