SCI 221

PL SCI 221 EXAM QUESTIONS AND ANSWERS LATEST UPDATE Why do we need plants and plant science ? - provide oxygen, food and more - slow down erosion, desertification and dust storms - trees provide habitat for animals, shelter and wood Improve mental health (place for recreation, people love forest, parks and gardening) Seed: definition and significance

SCI 221 CHAPTER 6 EXAM QUESTIONS AND ANSWERS LATEST UPDATE Normal flora bacteria will cause which type of infection endogenous Pathogens obtained in contaminated food are a form of indirect transmission Produced or arising from within a cell or organism endogenous An infection which is caused by organisms already present in the body is best described as endogenous What term refers to the invasion of the body by macroscopic parasites? infestation A highly communicable disease which...

SCI 221 EXAM QUESTIONS AND ANSWERS LATEST UPDATE

SCI 221 EXAM QUESTIONS AND ANSWERS LATEST UPDATE Apocrine sweat glands can be found in all of the following areas except the: soles of the feet. In which skin layer does the process of keratinization begin? Stratum granulosum Which skin layer contains closely packed, clear cells that contain a gel-like substance called eleidin? Stratum lucidum Which cells of the skin act as a type of antigen-presenting cell in the skin? Dendritic cells Which skin layer has cells that look prickly be...

SCI 221 EXAM QUESTIONS AND ANSWERS LATEST UPDATE rod-shaped bacteria bacillus Spore forming bacteria under unfavorable conditions are called sporulating What structure is found just inside the cell wall? cell membrane Two spherical cells that cling together following division form which of the following? 1-streptococci 2-staphylococci 3-diplococci 4-vibrio Diplococci A comma shaped bacterial cell is classified as: vibrio Spores are most likely to form when: The conditions for...

PLANT SCI 221 EXAM QUESTIONS AND ANSWERS LATEST UPDATE Prokaryotic vs. Eukaryotic Pro and Euk= cell wall, Euk= only has ribosome Why is larger cells at a disadvantage Have a higher SA so it takes longer for nutrients, minerals, water, and for instruction from the nucleus to reach across the whole cell. Protoplasm inside the cell wall, consist of all living components of the cell. Plasma membrane bounds the living components in, regulates movement of substances in and out of cell (sem...

PL SCI 221 MIDTERM EXAM QUESTIONS AND ANSWERS LATEST UPDATE Some advantages of graphing Precocity- ability to induce fruitfulness without need for completing the juvenile phase of plant Dwarfing- reduce size of scion Ease of propagation- when scion is difficult to colonial propagate Provide specific root characteristics- (ie root stock of tart cherry) Provide disease/pest resistance Stem modification Above ground- stolons, tendrils, thorns, crowns Stem modification Below ground...