3 years ago

Which description is an example of a phenotype?

Biology

1 answer:

pentagon [3]3 years ago

7 0

The correct answer is D. Both A and C

Explanation:

In biology, a phenotype refers to a trait or characteristic that is observable in an organism, including physical characteristics, physiological characteristics, and behavioral characteristics. The phenotype is the result of the expression of genes or environmental factors. Considering this, both "a certain duck has a blue beak" and "most cheetahs live solitary lives" are phenotypes because they are traits that can be observed in terms of morphology or physical characteristics in the case of the duck or in terms of behavior in the case of the cheetah. On the other hand, a mutation is not necessarily a phenotype except if it is expressed.

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21. The diagram below represents a sequence of events that occurs in living things.

Sladkaya [172]

Answer: b

Explanation:

All the smaller molecules are made up of the organic elements

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2 years ago

You dilute an unknown sample of bacteria to 1 x 10-6 and plate out 10 onto a Petri dish. The next day you count 64 colonies. The

Sveta_85 [38]

Answer:

Explanation:

The correct answer would be 6.4 x $10^6$ cells/ul.

For 1 x 10-6 dilution, the plating factor is $10^6$ . To find the number of bacteria in the original sample, the plating factor is multiplied by the colony count per ul.

<em>Number of viable bacteria = plating factor x colony count/ul</em>

Since 10 ul gives 64 colonies. 1 ul will give:

64/10 = 6.4 colonies.

Therefore, the viable bacteria in the original sample = 6.4 x $10^6$ cells/ul

The correct option is b.

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2 years ago

Which part of the wave has the highest frequency

d1i1m1o1n [39]

The very right of the diagram.

8 0

3 years ago