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gtnhenbr [62]
3 years ago
6

The major evolutionary split of protostome animals was based on

Biology
1 answer:
Misha Larkins [42]3 years ago
8 0
The basic functions of the United States government are defined in the Preamble to the U.S. Constitution.<span> The Supreme Court is one example of how the U.S. government</span>
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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
A mother brings a 15-month-old child to the well-baby clinic. she states the child has been taking approximately 18 to 20 oz (54
svet-max [94.6K]
A 15-month-old child, equivalent to a child of 1 year and 3 months of age, should have began weaning from bottle feeding from 6 months of age. Tooth decay or dental caries are commonly associated with prolonged bottle feeding as the sugars and other substances in milk; when drank from a teat from a bottle; prolongs the exposure of teeth to the milk, leading to overgrowth of bacteria causing dental caries. 
3 0
3 years ago
During the course of a physical exam, a physician suspects his patient may be depressed. In order to explore this diagnostic pos
tangare [24]

Answer: asked the patient two questions about feelings of hopelessness and feelings related to the enjoyment of activities

Explanation:

Hopelessness is an emotional context featured by a lack of hope, passion, and optism. It is expressed as a symptom of varying behavioral and mental health problems, including depression, bipolar, anxiety, eating disorders and among others.

In the other hand, the test on feelings related to enjoyment was done to evaluate the the emotions of pleasure from the individual’s engagements.

However, the physician carried out the two tests on his patient to know whether he's depressed or not.

6 0
3 years ago
Describe role of plant dieseas in forest ecosystem?
Marysya12 [62]

Answer:

Explanation:

It's a normal part of nature, and one of many ecological factors that help keep the hundreds of thousands of living plants. It also keeps animals in balance with one another.

8 0
2 years ago
How does the hypothalamus monitor water in the body?
krek1111 [17]

Answer:

The correct answer will be option-C.

Explanation:

Hypothalamus is a part of the brain which controls many important functions of the body by producing hormones.

When the amount of water gets reduced in the blood, it leads to a change in the osmolarity which can be easily detected by the osmorecpetors present in the neurons of the hypothalamus.

In response, neurons secrete Anti-diuretic hormone in the blood which acts in the tubules of the kidney where they help in re-absorption of the water from the body.

Thus, Option-C is the correct answer.

7 0
3 years ago
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