Martinndungu1986

1. A bacterial allele that provides resistance to the antibiotic streptomycin has which of the characteristics below? (A) is always beneficial to the bacterial cell. (B) is beneficial to the cell in the presence of streptomycin. (C) is neither beneficial nor detrimental to the cell. (D) is beneficial to the cell in the presence of any antibiotic. (E) is always detrimental to the cell. - (B) is beneficial to the cell in the presence of streptomycin. 2. A bird comes in a range of phenotype...

 what does the cell theory state? - that all cells come form previously existing cells and consist of three principles  what are the three principles of the cell theory? – 1. every organism is made up of one or more cells 2. the smallest organism are single cells, and cells are the functional units of multicellular organisms 3. all cells arise from a pre-existing cell  who developed the primitive light microscope? - robert hooke  who build his own microscope in the 1670's?...

CHAPTER 1: To test the effect of vitamin D on growth, two groups of rats were raised under identical conditions and fed the same diet. One of the groups received daily injections of vitamin D. The other group received injections of saline, which did not contain vitamin D. All the rats were weighed weekly for 2 months. In this experiment, the control was the? - group receiving saline CHAPTER 1: A good experiment should include as many variables as possible at the same time. True or False...

1. (U1) A biological polymer usually breakdown to monomers by a. dehydration process where enzyme catalyze the addition of water molecule to the polymer chain b. hydrolysis process where lipids catalyze the addition of water molecule to the polymer chain c. hydrolysis process where enzyme catalyze the addition of water molecule to the polymer chain d. dehydration process where enzymes catalyze the removal of water molecule from the polymer chain - hydrolysis process where enzyme catalyz...

1. - Potassium has an atomic number of 19. How many electrons are in the outermost energy level of a neutral potassium atom? 2. 1 - Consider elements with the atomic numbers listed below. Assuming the atoms were neutral, which of them would be least chemically reactive? A)1 B)8 C)16 D)4 E)10 3. 10electrons - How many electrons does an atom have if all of its electron orbitals are full in levels K and L? - If a radioactive element weighing one Kg. has a half-life of 100 years, it wil...

1. All organisms with prokaryotic cells are - unicellular (they exist as a single cell) 2. Animals and plants grow by - cell division 3. Bacteria grows by - enlarging their cells, then dividing to reproduce 4. Bacterial cell division occurs by a process know as - binary fission 5. Bending toward the light is called - phototropism 6. Biology is - The study of life 7. Cells are separated from their surroundings by a - plasma membrane 8. Cells fall into two main groups: - Eukaryotic and P...

1. __________ all machine components before coupling them together will reduce the number of shims required for alignment. - Leveling - Lubricating - Polishing the shafts of - Bolting down - Leveling 2. __________ are not permitted on the floor of a workstation. - Extension cords - Painted lines - Trash cans - Non-slip mats - Extension cords 3. __________ normally include verification that the floor is clean. - Routine housekeeping inspections - Corrective action reports - Maintena...

1. ________ Is a design methodology that designs features into the product that make it cheaper to manufacture while maintaining its ability to perform its intended function: - Design for Manufacturing and Assembly (DFMA) 2. ________ the cylinder valve when connecting a regulator - Slightly open 3. _________ are cylindrical pieces of foam stamped from a foam sheet - Disposable PVC foam plugs 4. __________ are formed when a solid, such as a metal, is heated above its boiling point and th...

1. ___________ coupling are used to act as a safety device if torque overload occurs - clutch 2. ____________ may remove a lockout on the power source of a piece of mechanical equipment - only the person who installed the lockout 3. A _____ should be used to check for sheave groove wear. - sheave gauge 4. A ______ bearing has inner and outer races that allow it to carry heavier axial loads than a standard ball bearing. - angular contact 5. A belt drive having a 12 inch pulley and a 6 i...

1. ___ couplings are used to act as a safety device if torque overload occurs - Clutch 2. ____ may remove a lockout on the power source of a piece of mechanical equipment - Only the person who installed the lockout 3. A common sign of a misaligned coupling is - Excessive Vibration 4. A gear is a wheel with ____ cut around its circumference - Teeth 5. A machine shaft and bore should always be checked for out of round status before performing status what task? - Pressing a bearing 6. A ma...