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gregori [183]
3 years ago
5

Why is rare to find fossils of animals from before the Cambrian period?

Biology
1 answer:
Vesna [10]3 years ago
6 0
The Cambrian explosion. Trilobites were found because of their hard shell, unlike soft bodied creatures.
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For what purpose is mitochondrial genomics used
bezimeni [28]

<span>The mitochondria are famously known as the powerhouse of the cell since it is the one that gives the cells energy that is also used by the human being.  This energy conversion is called oxidative phosphorylation. Mitochondria are found in eukaryotic cells, including humans.  These organelles also had its own genome, or what we called as DNA which is known as mitochondrial DNA, or mtDNA which is present in the mitochondrial matrix.  The role of mtDNA or mitochondrial DNA is to convert the energy from food into any other forms that it thinks the cell can use.  It is containing 37 genes which are all necessary for a normal mitochondrial function.</span>

5 0
3 years ago
Read 2 more answers
Plz help!
S_A_V [24]

Answer:

1.The pleural cavity aids optimal functioning of the lugs during breathing. It transmits movements of the chest wall to the lungs, particularly during heavy breathing. The closely approved chest wall transmits pressures to the visceral pleural surface and hence to the lung (10-19.

2.The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarge.

Explanation:

3 0
3 years ago
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Suppose that an adult black bear adds 50 pounds of fat in order to survive while hibernating through the winter. how much glycog
NemiM [27]

Answer: The correct answer would be 112.5 pounds

Explanation:

Let us first covert the pound into grams. We know that 1 pound is equal to 453.59 grams.

Thus, 50 pound of fat = 50 x 453.59 = 22,679.5 grams.

We know that, 1 gram of fat releases 9 Kcal of energy. Thus, total energy produced by 22679.5 grams = 9 x 22679.5 = 204,115.5 Kcal

Glycogen is carbohydrate thus, it will produce 4 Kcal of energy per gram.

Thus, 4 x C = 204,115.5 (where C is the grams of glycogen)

⇒ C = \frac{204115.5}{4}

⇒ C = 51,028.875 grams

Using 1 pound = 453.59 grams, we con convert 51,028.875 grams into pounds:

453.59 = 1

1 = \frac{1}{453.59}

51,028.875 = \frac{1}{453.59} x 51028.875

= 112.5 pounds

Thus, 112.5 pound of glycogen would be needed to produce the same amount of energy as produced by 50 pounds of fat.

8 0
3 years ago
3. Si sales de tu casa y recorres 5 metros de distancia. ¿A qué distancia te<br><br> desplazaste?
olganol [36]

Answer:

5 metros.

Explicación:

Si sale de su casa y camina 5 metros, significa que está a 5 metros de su casa porque cubre 5 metros de distancia. La distancia es la longitud que recorre un cuerpo entre dos puntos. Aquí un punto es la casa y el otro punto es la persona, por lo que si calculamos la longitud, encontramos que el individuo cubre 5 metros por lo que podemos concluir que el individuo está a 5 metros de su casa si camina 5 metros de su casa. casa al exterior.

8 0
3 years ago
The sodium‐potassium ion pump found in some cell membranes is made of basic structural components?
Tems11 [23]

Answer:

amino acids

Explanation:

(if you are confused, I recommend watching the videos from Khan Academy and The Amoeba Sisters.)

7 0
3 years ago
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