BIOLOGY MIDDLE SCHOOL

scientist noticed that a dark-colored peppered moth is more visible on a light-colored background than a light-colored peppered moth. He wonders, “Does this difference in visibility affect the survival rate of dark moths?” Which part of the scientific method does he need to carry out next?

Answers

Answer 1
Answer: yes lighter moths are more likely to not be seen by a bird but a dark moth on a light tree are more likely to be seen

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which type of organism converts wastes and dead materials into nutrients that can be used buy plants?

Answers

Decomposers do! If your asking about specific animal then a good example would be worms
Decomposers take waste and dead materials and converts them into useable materials with nutrients. :^)

Short pea plants exist in the P1 and F2 generations. What happens to the phenotype in the F1 generation?

Answers

Answer:B:The allele for short pea plants is masked during the F1 generation, but is still present in the genotype

Explanation:

I took the test

Answer is B

Explanation:

In which type of exercise would fat reserves be used to create ATP

Answers

ATP is synthesizes in glycolysis, and through citric acid cycle.
In case of glucopenia (lack of sugars, after a long-term excerice), fat mobilization from adipose tissue is observed, followed by hydrolysis to fatty acids and glycerol.
Glycerol is used as a precursor in glucose recycling via gluconeogenesis: this accelerated gluconeogenesis requires energy.
Fatty acids are oxidized by beta-oxidation, pass through L-carnitine through the mitochondrial membrane (carnitine molecular shuttle) and via AcCoA into the citric acid cycle and even bring more energy that glucose burning but in the long run.

In 1967 a penicillin-resistant pneumonia, caused by Streptococcus pneumoniae and called pneumococcus, surfaced in a remote village in Papua, New Guinea. At about the same time American military personnel in southeast Asia were acquiring penicillin-resistant gonorrhea from prostitutes. By 1976, when the soldiers had come home, they brought the new strain of gonorrhea with them and physicians had to find new drugs to treat it.

In 1983 a hospital-acquired intestinal infection caused by the bacterium Enterococcus faecium joined the list of bacteria that could not be killed by penicillin.
Which of these BEST describes why certain bacteria have become resistant to penicillin?
A) The penicillin in the 1970's was much weaker that the penicillin used today, thus it was not as effective.
B) Penicillin was not effective in treating any bacterial diseases, so the doctors had to find new treatments.
C) These new bacterial strains came out of the jungles and forests already equipped to be penicillin-resistant.
D) Penicillin was so heavily prescribed by doctors that it led to certain, more fit, strains of bacteria to be able to survive.
2)

Answers

I think B but i’m not for sure

Answer:

D. Penicillin was so heavily prescribed by doctors that it led to certain, more fit, strains of bacteria to be able to survive.

Explanation:

Researchers thought penicillin was the cure for all, and thus it became overused. Through natural selection, new, stronger strains of bacteria developed.

What is the control center of a cell?

Answers

The genes within these chromosomes are the cell's nuclear genome. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression the nucleus is, therefore, the control center of the cell.

most animal cells membranes have proteins that pump Ions out of the cell and potassium ions into the cell

Answers

Ans.

The membrane proteins that pump sodium ions out of the cell from inside and potassium ions inside the cells are called as sodium-potassium pumps or sodium-potassium ATPases.

These proteins perform active transport by using energy from ATP hydrolysis and transport two potassium ions inside the cells, along with transport of three sodium ions outside the cells, against the concentration gradient.

Thus, the correct answer to complete the sentence is sodium.
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