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Edexcel as level history paper 2h mark scheme june 2023

Edexcel a level history paper 3 option 37 mark scheme june 2023

Question 1 Although viruses are not living and as such are not considered microorganisms, they can, however, be classified as microbes, a more general term that includes microorganisms and viruses. True True/False. A virus is classified as a microbe.

Define the concept of universal precautions. Universal precautions means any and all samples, whether known or unknown, are to betreated as potentially hazardous (or pathogenic) materials. 2. List at least 3 observations a researcher would be sure to note while assessing an unknownmicrobial sample. A lab researcher would be certain to note: 1. Size and shape 2. Any observable motility 3. Gram status (positive or negative) 4. The presence of any chemical reactions BIOD 171 EXAM MODULE 5...

True or False: Growth media is best suited for distinguishing between two similar species of bacteria. False. Growth media is designed to simply support (and not restrict) microbial growth. 2. A researcher is asked to determine which of two vials contains E coli and which contains Salmonella. Knowing both are Gram-Negative while only one of them is capable of fermenting lactose, which type of media would be best suited: BIOD 171 EXAM MODULE 41. True or False: LB agar is classified as a sele...

What is Apoptosis? - correct answersA programmed cell death What is necrosis? - correct answersDeath of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply. Characteristics of tissue necrosis - correct answers1) Rapid loss of of the plasma membrane structure 2) Organelle swelling 3) Mitochondrial dysfunction Hypoxia - correct answersWhat is the #1 major cause of cellular injury leading to necrosis. (especially the kidney and heart) What ...

What are the treatment processes in PRELIMINARY Wastewater Treatment? - Screening Comminution Grit Removal Pre-Aeration Flow Metering / Sampling What are the treatment processes in PRIMARY Wastewater Treatment? - Sedimentation / Flotation What are the treatment processes in SECONDARY Wastewater Treatment? - Biological Treatment (ie activated sludge, trickling filters, rotating biological contactor (RBC)) Sedimentation What are the treatment processes in TERTIARY Wastewater Treatment? -...

1. A factor or agent which increases the risk of cancer is known as a a. teratogen b. mutagen c. carcinogen d. fomite - carcinogen 2. The four major causes of death among all age groups of Americans include all of the following except. a. homicide b. accidents c. malignant neoplasms d. heart disease - homicide 3. In recent years, the largest number of rabies cases were associated with a. skunks b. bats c. dogs d. raccons. - skunks 4. Asbestosis is caused by fine silicate fibers ...

You arrive to find a 48 year old male complaining that his chest feels heavy. The patient is awake and talking to you. During your assessment, you note that his skin is pale, cool, and clammy. Your first step is to: A. apply your AED B. administer supplemental oxygen C. obtain a past medical history D. assist the patient in taking his neighbor's nitroglycerin B (Your first step is to administer supplemental oxygen. When treating chest pain, it is important to get oxygen to the patient a...

Hypoglycemia and acute ischemic stroke can present similarly because: • A:both oxygen and glucose are needed for brain function. • B:the majority of stroke patients have a history of diabetes. • C:the most common cause of a stroke is hypoglycemia. • D:they are both caused by low levels of glucose in the blood. • A:both oxygen and glucose are needed for brain function. Reason: Although stroke and hypoglycemia are two distinctly different conditions, their signs and symptoms are o...