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Phoenix [80]
3 years ago
6

What can you conclude about fossil by looking at the layers of rock?

Biology
2 answers:
Murrr4er [49]3 years ago
8 0

<em>Answer is B. The fossils in the lower layers are older than the fossils in the upper layers.</em>

Nikolay [14]3 years ago
3 0

Answer:

The correct answer is option B.

Explanation:

The layers of the rocks also known as the geological column. By studying the rock layers the scientists have come to know that the rocks are arranged in layers and comprise fossils. Of these the fossils, which are the oldest are found at the deepest layers, and the most recent ones or the youngest fossils are found close to the top. Thus, one can consider the layers of rocks as a vertical timeline.

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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
What conditions account for the development of highly diverse habitats in coastal waters?
kirza4 [7]
<span>I think for the most part, the warmth of the waters determine what lives in them. In warmer coastal waters, you are going to find coral reefs that provide homes to millions of species of fish and micro-organisms.</span>
4 0
3 years ago
What did organic polymers form when they joined together on earth
skad [1K]
I think the answer would be protons
6 0
2 years ago
When you examine fluid that you have drawn from a blood vessel in someone's arm, you find that it is relatively high in carbon d
ziro4ka [17]

Answer:

The given blank can be filled with a venule.

Explanation:

A small blood vessel in the microcirculation, which connects the capillary beds to the veins is known as the venules. Various venules combine to form a vein. The walls of a venule are formed of three layers, that is, the inner endothelium formed of squamous endothelial cells, a middle layer of elastic and muscle tissue, and an external layer formed of fibrous connective tissue.  

The size of a venule ranges from 8 to 100 micrometers in diameter and are produced when capillaries come in close association. A venule refers to a small blood vessel that permits the deoxygenated blood high in carbon dioxide and waste products to return from capillary beds to the bigger blood vessels known as veins.  

4 0
3 years ago
Which of the following are formed during photosynthesis
Daniel [21]

Answer:

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

Explanation:

4 0
2 years ago
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