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weeeeeb [17]
3 years ago
5

Nelly was reading about ecological pesticides. She found a website that said that skeletons of some organisms settle as sediment

s in the ocean. They are then used as pesticides because they are abrasive against pests. Which organism is the article discussing?
A. dinoflagellates
B. diatoms
C. green algae
D. euglenoids
E. amoeba
Biology
1 answer:
Mnenie [13.5K]3 years ago
7 0

The answer is B. When diatoms die and fall off the ocean column to the ocean floor, they become part of sediments over time. When they are mined and exposed, they turn to a diatomite. Diatomaceous earth is significant as a pest repellant because of its hygroscopic property and has very abrasive particle hence it absorbs the water-protective fats and oils from the outermost layer of insects.

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In a sample of 2,400 people, 1,482 were found to have the dominant (taster) phenotype. Assuming that the population is in Hardy-
Alex_Xolod [135]

Answer:

1128.

Explanation:

The dominant taster phenotype is 1482.

The recessive taster phenotype = 2400 – 1482 = 918 .

Recessive phenotypes = 2400 – 1482 = 918

The recessive phenotype frequency = q² = 918 / 2400 = 0.38.

the recessive allele frequency q = √0.38 = 0.62.

The dominant allele frequency, p = 1-q = 1- 0.62 = 0.38

The heterozygous frequency =  2pq = 2 ×0.38 × 0.62 = 0.47 .

The heterozygous individual in the population = 0.47 × 2400 = 1128.

Thus, the answer is 1128.

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<u>Answer</u>:

The nucleus is primarily stores most of the cell's DNA.

<u>Explanation</u>:

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