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4 years ago

Caracteristicas de punto de fusion rapido¡¡¡

Biology

1 answer:

solong [7]4 years ago

3 0

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Describe what happens to the body when cell division becomes uncontrolled (or abnormal)

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Cancer is the typical result of cell division

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What is one rock from the mars

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After ovulation, high levels of _____ inhibit _____ secretion. after ovulation, high levels of _____ inhibit _____ secretion. es

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<span>After ovulation, high levels of estrogen inhibit progesterone secretion. FSH LH.</span>

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3 years ago

You spread 0.1 mL volume of a 10^(-5) dilution onto a nutrient agar plate. After 24 hours of incubation at 37°C, there were 223

Sidana [21]

Answer:

The correct answers are 2.23 * 10^8 CFU/ml and 2 colonies.

Explanation:

Based on the given information, 0.1 ml is the amount of bacterial culture plated, 10^-5 is the dilution factor and the number of bacterial colonies produced is 223.

A) 223 is the number of colonies produced when 0.1 ml of the culture is plated. Therefore, the number of colonies produced when 1 milliliter of bacterial culture plated us (223/0.1)*1 = 2230

The calculation of the CFU/ml is done by using the formula,

CFU/ml = Number of colonies per ml plated / dilution factor

Thus, 2230/10^-5

= 2230 * 10^5 or 2.23 * 10^8 CFU/ml

B) The number of colonies, which would grow on a plate, which is inoculated with 0.1 ml volume of 10^-7 dilution from the similar bacterial stock will be calculated as,

CFU/ml = Number of colonies per ml plated/ dilution * volume plated.

2.23 * 10^8 CFU/ml = Number of colonies per ml plated / 10^-7 * 0.1

Number of colonies per ml plated = 2.23 * 10^8 * 0.1 / 10^7 = 2.23 or 2 colonies.

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3 years ago

Sexual reproduction amongst protozoa is done by _____.

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Protozoa reproduce by internal fertilization, or asexual reproduction.

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3 years ago

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