Tutor profile: Emmah M.
Subject: Environmental Science
How would you describe the air quality of a busy City's Central Business District (CBD) between 07:30am- 09:30am in Summer?
07:30- 09:30am are traffic peak hours as employees and employers rush into the CBD to begin their days in the offices. Industries also dispatch their delivery vehicles around this time into the CBD commercial outlets. As a result the air is ridden with exhaust fumes such as carbon monoxide, carbon dioxide, volatile organic compounds (VOCs) and nitrous oxides. When it is sunny as is usually the case on summer mornings these nitrous oxides react in the sun to produce photochemical smog which manifests as a brownish haze. These pollutants may cause adverse health effects and as such the air quality may be described as on the upper end of moderate (4-6) on the air quality index.
What are the differences between a plant and an animal cell?
Plant Cell has the following: -A cellulose cell wall -A rectangular shape -Chloroplasts -A large central vacuole & plastids Animal Cell has the following in contrast: - No cell wall but a cell membrane - A circular shape - No chloroplasts - Small vacuoles and no plastids
Subject: English as a Second Language
Anna was on her way home from school when she noticed a dirty, shivering brown puppy by the roadside. She stopped, took it in her arms and started examining it. She was suddenly startled by a growling sound behind her which she later found to be that of the puppy's mother. Question: Where did the growling sound come from?
The growling sound came from the puppy's mother that came behind Anna as she was examining the puppy.
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