Neon is a noble gas so not that
Helium is a noble gas so no
Flash camera, tricky but I’m POSITIVE that the tubes of the flash part got some argon to increase bulb life
MP3 player, probably this
I wouldn’t recommend trusting me but hey why not
“It is a type of homogeneous mixture.” is false.
Question is incomplete. Complete question is as follows:
You have decided to determine how many microbes are living on the lettuce in the salad bar at your favorite restaurant. You place 1 gram of lettuce and 99 mls of water in a blender and blend the mixture. This is sample A. You then transfer 1 ml of this dilution into to another that contains 9 mls of water. This becomes sample B. You next transfer 1 ml of sample B into a separate container that contains 9 mls of water. This is sample C. Next you transfer 1 ml each from samples B & C onto separate nutrient rich agar plates, swirl, let harden and incubate at 37C. When you examine the plates after 48 hours you find 110 colonies growing on plate C. How many microbes were living on that 1 gram of lettuce?
Answer:
1.1x10^6 microbes
Explanation:
When 1gm of lettuce is mixed with 99 ml of water, the microbe concentration is diluted 100 times (Sample A). 1 ml of sample A is mixed with 9ml of water to make sample B which further dilutes microbe concentration 10 times making the total dilution 1000 times. This process is repeated with sample B to make sample C increasing the dilution to 10000 times.
110 colonies are counted from this sample C. Each colony signifies a single microbe during plate counting method. So, 110 microbes were present on the plate. Original number of microbes = microbes counted * times of dilution =
110 * 10000 = 1100000 = 1.1x10^6 microbes
1. The cells divide by constriction of a protein, it is true in case of Bacteria and Animals, and false in case of Plants.
2. The presence of a cell wall inhibits the cell from differentiating by constriction, it is false in case of bacteria; though bacteria exhibit a cell wall but still divide by constriction. It is also false in case of animals, but true in case of plants.
3. Tubulin-like molecules or tubulin subunits function in the division of the cell. The statement in true in case of bacteria and plants, but is false in case of animals.
Water privatization is used here as a shorthand for private sector participation in the provision of water services and sanitation. Private sector participation in water supply and sanitation is controversial. Proponents of private sector participation argue that it has led to improvements in the efficiency and service quality of utilities
hope this helps
