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azamat
3 years ago
9

DDT is a synthetic compound commonly used as an insecticide. It was used to control mosquito species that commonly spread diseas

es like malaria. The data show the percent resistance for three species of mosquitoes over three decades. What explains the trend seen in the data
Biology
1 answer:
fenix001 [56]3 years ago
3 0

Answer:

The phenomenon that explains the trend seen in the data is that the mosquitoes' evolution has led them to develop resistance to the compound.

Explanation:

This is a very common factor that we can see in insects. The effect of DDT on the species will have different levels of impact. One is going to be more vulnerable to the compound that the rest. However, after many times of exposition to the compound, a few survivors will develop resistance to the compound and their offspring is going to inherit that resistance. Making them increase the resistance over time.

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A man has extra digits (six fingers on each hand and six toes on each foot). His wife and their daughter have the normal number
Mnenie [13.5K]

Answer:

The correct answer is - option D. 1/2

Explanation:

Extra digits on hands and feet mean an individual has six fingers in each hand and feet, this is known as polydactyly. Polydactyly shows an autosomal dominant type of inheritance pattern.

In this case, the mother is normal so she must be recessive alleles and the first daughter is normal so the father must have a recessive allele which means he is heterozygous.

Cross:

Man = Dd

Woman = dd

Their children :

    D      d

d   Dd    dd  

d  Dd    dd

Probability of polydactyl child = 2/4 or 1/2 or 50%

6 0
3 years ago
Which best defines a diploid cell during meiosis?
Lubov Fominskaja [6]
Diploid cells. Meiosis is the process of cell division by which involving gametes. Cell division is just the same for sperm and egg cells, but they have distinguishable descriptions and labels in the process. Spermatogenesis is for the males’ sperm cells and oogenesis is the process for females’ egg cells. The cell division of meiosis involves the two phases, respectively meiosis I and meiosis II. Meiosis I like mitosis is the cell division that produces diploid cells. These diploid cells are cells that contain a complete pair of chromosomes which is 46. The result is two diploid cells after the first meiosis. To provide clear explanation, in contrast haploid cells only contain 23 chromosomes and are created after meiosis II which is 4 in number.



6 0
4 years ago
PLEASE HELP ME! I need help so bad right now. I am super desperate and NEED to get this right. Please answer if you are sure. I
andre [41]

Answer:

organisms 3 and 4

Explanation:

6 0
3 years ago
A member of the health care team is researching the etiology and pathogenesis of a number of clients who are under his care in a
hram777 [196]

Answer:

The correct answer is B. A client who has increasing serum ammonia levels due to liver cirrhosis

Explanation:

Etiology is the study of origin or cause of any disease. Pathogenesis is the mechanism of causing disease by any pathogen. Pathogens use four-step to become pathogenic which are contact, colonization, invasion, and infection.  

In pathogenesis the symptoms of disease is observed not the cause so in option B increasing serum ammonia level is the symptom of liver cirrhosis which characterize pathogenesis rather than etiology and in other option, only cause of a medical condition is described so the correct answer is B.

7 0
3 years ago
If a plant can use light energy to make materials, why does it need sugar?
ASHA 777 [7]

Answer:

to help it grow i think

Explanation:

6 0
2 years ago
Read 2 more answers
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