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2 years ago

A DNA sample contains 30% cytosine. What percentage of the sample would be thymine?

Biology

1 answer:

julia-pushkina [17]2 years ago

6 0

Answer:

30% Thymine

Explanation:

If 30% of Adenine is present, it would be reasonable to assume that 30% of Thymine will be present, as the ratio between the two complementary nitrogenous bases will be roughly equal.

Therefore, that leaves us with 40% between Cytosine and Guanine. Since the ratio between them would be equal, it gives us 20% of Cytosine and 20% of Guanine.

Therefore:

30% of A + 30% of T + 20% of C + 20% of G = 100% DNA

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A certain species of butterfly varies in color from white to dark blue. The birds found in the same area feed on the white or li

frutty [35]

Answer:

Explanation:

Directional selection is a type of natural selection that occurs when members of a population of a species with a particular extreme phenotype is selected or favored against the other phenotypes when natural forces act on the population of a species. Individuals having the particular traits that are favored survive and become more common that others with traits that are less favored.

Directional selection may likely result in the species of butterflies in which darkly collared butterflies are not preyed upon, ensuring their survival, while the other butterflies with other colors will be phased out with time. Darkly colored butterfly will be selected for while the others will be selected against.

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2 years ago

What term describes the continuation of a visual sensation.

LiRa [457]

Answer:

Afterimage.

Explanation:

An afterimage describes the continuation of a visual sensation after removal of the stimulus. For example, when you stare briefly at the sun and then look away from it, you may still perceive a spot of light although the stimulus (the sun) has been removed.

Hope this helps! :)

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1 year ago

Three linked autosomal loci were studied in cucumbers: fruit color (dark vs. light), tendril size (long vs. reduced) and fruitin

Zina [86]

Answer:

Explanation:

1. Progeny observed in the experiment is calculated by adding all the progeny numbers observed in the :

TIME TO FRUIT TENDRIL SIZE FRUIT COLOR NUMBER

Normal normal dark 370

normal normal light 32

early normal light 971

early normal dark 28

early reduced dark 25

early reduced light 483

normal reduced light 36

normal reduced dark 810

TOTAL

PROGENCY 2755

2. The locus in the center is TIME TO FRUIT. Tendril size is at the beginning of the locus and the distance between the locus B and locus C is R2

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2 years ago

Como se forma un tumor?

elena-s [515]

Question:

how does a tumor form?

Answer:

En general, los tumores ocurren cuando las células se dividen y se multiplican excesivamente en el cuerpo. Normalmente, el cuerpo controla la división y el crecimiento de las células.

English:

In general, tumors occur when cells divide and multiply excessively in the body. Normally, the body controls the division and growth of cells.

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2 years ago

Read 2 more answers

Which are scentific questions that can be asked about a collection of diffrent ochid types?

patriot [66]

Answer:

Do different colors attract different pollinators.

Explanation:

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3 years ago