BIOLOGY MIDDLE SCHOOL

Explain how antibiotic resistance in bacteria provides evidence that supports Darwin’s theory of evolution

Answers

Answer 1
Answer:

Antibiotic resistance in bacteria provides evidence that supports Darwin’s theory of evolution.

Explanation:

Darwin’s theory of evolution mentions about the theory of natural selection by which the nature selects the fittest individuals. It is always the survival of the fittest that takes place in any ecosystem. If there is an external pressure or threat , the organisms that have evolved to overcome this only gets the chance of survival.

Antibiotic resistance that some bacteria show is an example of natural selection. In the initial periods many bacteria would have died out due to the action of antibiotics. In the process of evolution a mutation might have occurred that confers the bacteria resistance to antibiotics.

The process of natural selection allows the bacteria with this mutation offering antibiotic resistance to survive. Since this is a mutation ensuring survival the mutant gene would have been passed over generation producing a species of antibiotic resistant bacteria.

Answer 2
Answer:

Answer and Explanation:

Some pathogens and pests usually survive and reproduce even when they are exposed to the antibiotics and pesticides repeatedly. These instances show that within the population soe individuals possess the gene for resistance or acquire it through mutation hence survives the chemical. Those that survive transmit this characteristic to their offsprings thus establishing a new population of resistant forms.


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MIDDLE SCHOOL

The moon s phases are caused by

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Answer:

The phases of the Moon depend on its position in relation to the Sun and Earth. As the Moon makes its way around the Earth, we see the bright parts of the Moon's surface at different angles.

Explanation:

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I believe that it is Lunar phase. A lunar phase is the shape of the directly sunlit portion of the Moon as viewed from Earth.

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MIDDLE SCHOOL

Daniel is studying feeding relationships in a neighborhood pond. He observes several organisms that feed on one another, and he organizes them into the food chain model shown below. An arrow points from algae to a snail. An arrow points from the snail to a sunfish. An arrow points from the sunfish to a heron. Explain the role of photosynthesis in the pond ecosystem. In your explanation, discuss whether or not the organisms that Daniel studied depend on photosynthesis, either directly or indirectly.

Answers

So given the suggested food chain of algae-snail-sunfish-heron we can conclude that this food chain is heavily dependent on the process of photosynthesis.

The algae is the only of the organism that are directly dependent of the photosynthesis for their survival, while the snail, sunfish, and heron, and indirectly dependent on it.

Since we are talking about a food chain, in essence it means that all organism are connected through one another. So the algae perform photosynthesis for its own survival, the snail is using the algae is a food source, the snail is later eaten by the sunfish, and the sunfish goes on the menu of the heron.

If the algae, by some scenario, are not able to perform photosynthesis, than they will die off, and if they die off, than the snail will die off because of lack of food, if the snail dies off, along with it dies off the sunfish because of lack of food, and if the sunfish is out of the scene, the heron goes as well.

So we can conclude that the process of photosynthesis is of crucial importance for the survival of all four species, be it directly or indirectly.

MIDDLE SCHOOL

Why must dna replication happen in the nucleus of the cell

Answers

All DNA is a cell is harbored in the nucleus, so DNA replication should only occur in the nucleus of the cell.

HIGH SCHOOL

Why is atp production during cellular respiration characterized as indirect?

Answers

ATP is not produced directly by the ETC but instead via the proton gradient generated during electron transport through the ETC.

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