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soldi70 [24.7K]
3 years ago
10

Objects that are too small or too large, events that occur too slowly or too quickly, and processes that are too complicated or

too dangerous are most often represented by _______.
A.
models
B.
specimen collections
C.
controlled scientific experiments
D.
all of these
Biology
2 answers:
stira [4]3 years ago
5 0

The answer would be A. Models

mestny [16]3 years ago
3 0

Answer:

The answer would be A models

Explanation:

This is the correct answer on study island

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A number of marine reptiles and birds have salt glands, which have a remarkable ability to concentrate salt solutions for excret
Lemur [1.5K]

Answer:

A)100mL  B)50mL  C)The second option  D)Hypoosmotic Environment

Explanation:

The average Na concentration in the seas and oceans of the world is around 3,5% which mean that in 100 ml of sea water, there is around 3,5 grams of Na.

The weight of one mol of NaCl is 58,44 grams. For 3,5 grams of NaCl, we get 3,5/58,44 = 0,060 mol of NaCl which is 0,060x1000 = 60 mmol/100ml. According to this and the information given in the question about the secretion of the salt glands', if the average sodium concentration is 600mmol/L, we have 60*10 = 600mmol/L so it would take 100 mililiters of water to excrete.

If the average Na concentration of the salt gland's secretion were 300 mmol/L, only 50 mililiters of water would be needed to excrete the same sodium load.

The second option of secretion is hyperosmotic to seawater because the concentration is higher.

Osmoregulation is the process of balancing the amount of water and salt between the body of the organism and its surrounding environment. For salt glands to be advantageous for osmoregulation, they need to be in a hypoosmotic environment.

I hope this answer helps.

3 0
3 years ago
Recall that two hydrogen bonds bind A and T, but three hydrogen bonds bind G and C. Because the stability of DNA is affected by
IrinaK [193]

Answer:

A molecule with 32 percent or more amount of Cytosine.

Explanation:

DNA is the genetic material of all the living organism but in few viruses, RNA can also acts as the genetic material. DNA contain nitrogenous bases ( adenine, guanine, thymine and cytosine), deoxyribose pentose sugar and the phosphate bond.

The triple bond is more stable than the double bond. Since, cytosine and guanine shows triple hydrogen bonding and shows more stability. The DNA molecule that contains more residues of guanine and cytosine is stable than the molecule containing adenine and thymine residues.

Thus, the answer is molecule with 32 percent or more amount of Cytosine.

8 0
3 years ago
What are the nine activities that scientists engage in as part of scientific inquiry?
Crazy boy [7]
The nine activities that scientists engage in as a part of scientific inquiry are the following:
1. Observe
2. Define the problem
3. Form a study question
4. Research the problem
5. State the expectations (hypothesis)
6. Experiment and gather data
7. Analyze the results
8. Reflect on the findings
9. Communicate with the wider community

3 0
3 years ago
Read 2 more answers
In a certain locality all the farmers are applying fertilizers to the leaves of plants what type of fertilizer application are t
bearhunter [10]

Answer:

probably spraying or dusting the plants

Explanation:

3 0
3 years ago
Read 2 more answers
Cystic fibrosis affects about 200,000 people in the united states. <br> a. True <br> b. False
Lorico [155]
Cystic fibrosis affects more than 200,000 people in the United States so false.
5 0
3 years ago
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