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4 years ago

In the 19th century, Gregor Mendel performed a series of experiments on pea plants that led to the establishment of the field of

1 answer:

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This is a very easy paragraph analysis question. The answer is c. "Over time, scientific knowledge is reevaluated and extended through new scientific research." The reason why the answer is C., is because the chronological order of the study of genetics is as follows:

- Mendel does his pea plants experiments, but did not know how traits were passed to the offspring.

- Avery concludes that DNA is the "material" that passes on traits to the offspring, probably using Mendel's research and his own research (pneuonimia virus research) as well.

- Since the existence of DNA was published, Watson and Crick used it to identify an accurate model of the structure of DNA, using the four bases: cytosine, adenine, guanine, and thymine.

Overall, we see a trend of scientists publishing results based on what scientists did before.

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Salmon hatcheries are commonly found near rivers along the West Coast of the United States because of decline in wild salmon pop

Sidana [21]

Answer:

Salmon populations in the United States is declining due to the following factors:

1. Over-fishing and human activities have put a major influence on the population of salmon.

2. Due to industrialization, urban growth, unplanned farming, deforestation, and pollution would have imparted strains on the stocks of salmon. Apart from this chemical contamination from the industrial run-off and agricultural activities are also declining populations of salmon.

3. Genetically modified fish from hatcheries usually escape and interbreed with wild fish, thus, changing the genetic features of the populations.

4. Construction of hydropower dams is also a major cause of the salmon population declining.

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3 years ago

Read 2 more answers

The sebaceous and sweat glands associated with the skin are classified as ________ glands because they release secretions to the

lbvjy [14]

Answer: exocrine glands

Explanation: Exocrine gland secrete substances to an epithelial surface through a channel.

The sebaceous and sweat glands associated with the skin also secrete substance to skin surfaces via ducts/ channels and are classified as endocrine gland. There are two glands in the human body Exocrine gland and Endocrine gland.

Endocrine gland secrete substance into the bloodstream directly. Examples of exocrine glands are sweat, salivary, mammary, sebaceous, and mucous.

liver and pancreas are both exocrine and endocrine glands simultaneously.

As exocrine gland, the liver secrete bile and the pancrease secrete pancreatic juice into the gastrointestinal tract through channels. While as endocrine gland they secrete other substances directly into the bloodstream.

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3 years ago

For another type of frog, 3 eggs in a row measure 6 mm across. What is the length of a line of 12 eggs

Sphinxa [80]

24 eggs would be the answer

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3 years ago

Describe what you can do to slow down, or stop the continuous negative human treatment of our aquatic biomes. PLs Answer ASAP!!!

erastova [34]

Answer:

The major cause of negative human treatment of our aquatic biomes include pollution and overfishing. It can however be slowed down by less dependence of aquatic animals for food in order to preserve the aquatic biomes.

Advocacy should be done also to sensitize people about the effects of pollution and overfishing in water bodies. Pushing for the enforcement of rules protecting the aquatic biomes from pollution should also be taken note of to improve the conditions of the biome.

6 0

3 years ago

Read 2 more answers

Which of the following is the best description of a plant system?

qaws [65]

Answer:

I think it is B

Explanation:

This is because plants are usually similar that grow together in a specific area with specific weather. I apologize if this is wrong.

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3 years ago