How would you determine whether a colony was a contaminant on a streak plate?

Biology

1 answer:

Phoenix [80]3 years ago

7 0

A contaminant would be one growing in an area where you did not streak!

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Holly is a healthy woman who is 22 years of age. using this information, calculate her target heart rate zone for moderate-inten

guajiro [1.7K]

Answer:

99 to 138.6 bpm

Explanation:

The heart rate of an individual is a measure of how many times the heart beats in a given time, usually measured in beats per minute (bpm).

Resting heart rate is the number of beats per minute when an individual at rest. Generally, it can be understood that the lower the resting heart rate, the more physically fit an individual is.

The maximum heart rate for an individual is 220 minus their age. The target heart rate for moderate physical activity is 50-70% of the maximum heart rate and for vigorous physical activity it is 70-85% of the maximum heart rate.

Based on Holly's age, her maximum heart rate is 220 - 22 = 198 bpm

Her heart rate zone for moderate physical activity is 50-70% of 198 bpm: 99 to 138.6 bpm

Her heart rate zone for vigorous physical activity is 70-85% of 198 bpm: 138.6 to 168.3 bpm

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3 years ago

A group of ponies lives in the Chincoteague National Wildlife Reserve in Virginia. The development of longer legs over time woul

Trava [24]

The national wildlife refuge at Chincoteague,Virginia, is one of the newest in a chain of sanctuaries placed along the flight lanes of the waterfowl.

5 0

3 years ago

What is used to measure volume?

ratelena [41]

Could be a graduated cylinder. Hope this helps :)

4 0

3 years ago

10. Researchers observe a large population of birds on a remote island. Birds in the population are found to have either red cre

IgorLugansk [536]

Suppose that the proportion of the white crest alleles (r) is given by w and that of the Red crest allele (R) is given by p. We have that p+w=1. The probability that an individual has 2 r alleles is given by w*w since for each allele position the probability is w. Only these individuals have a White phenotype. Hence, we get that w^2= $\frac{1759}{1759+11088}$ ; the right hand side is the proportion of white birds in the total population. Doing the calculations, this yields that w=0.37. From this, we calculate that p=0.63. The possible ways we have heterozygous individuals are the combinations Rr and rR. The probability for each of those is p*w. Thus, the total probability is 2pw. This is equal to 0.466=0.47. This is the fraction of the future population that is going to be heterozygous assuming the conditions of the Handy-Weinberg equilibrium like random reproductive matching etc.

7 0

4 years ago

3. All of the organic molecules are based on which element?

Ulleksa [173]

Answer:

<h2>Carbon. </h2>

Explanation:

Life is based on carbon; organic chemistry studies compounds in which carbon is a central element. The properties of carbon make it the backbone of the organic molecules which form living matter. Carbon is a such a versatile element because it can form four covalent bonds.

<h3>Hope it helps you⚛.</h3>

Thanks☸.

7 0

3 years ago