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chubhunter [2.5K]
3 years ago
7

Which element is not represented in the star spectrum below? Hydrogen Helium Calcium Magnesium

Biology
2 answers:
zheka24 [161]3 years ago
8 0
The answer from what I know is Magnesium

Dafna11 [192]3 years ago
6 0
Magnesium is the right answer

hope this helps you
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C it contains only yellow and blue
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Most of the joints in the appendicular skeleton are __________ joints.
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Most of the joints in the appendicular skeleton are synovial joints.

So, the correct option is (c).

  • A joint, sometimes referred to as an articulation, is where two or more bones come together. The names of two bones are included in each articulation.
  •  Immobile joints are ones that do not permit movement at the joint sites .These joints don't have a joint cavity; instead, dense fibrous connective tissue, typically collagen, holds the bones physically together.
  • A synovial membrane-lined joint capsule that produces synovial fluid surrounds and protects the two of them.
  • Specialized joints known as cartilaginous joints can be identified by their structural characteristics.
  • In fibrous joints, white connective tissue  fibres that travel from one articulating portion to the next separate the articulating parts.

To learn more about synovial joints.

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4 0
1 year ago
Which classes are included in the group Tetrapoda?.The choices are: Bony fishes, Amphibia, Reptilia, Aves, and Mammalia. . . . A
Sidana [21]

Amphibia, Reptilia, Aves, and Mammalia are included in the group Tetrapoda. The correct answer between all the choices given is the second choice. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

4 0
3 years ago
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On a backpacking trip, Kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 Calories. At the school tra
emmasim [6.3K]

Answer:

A. If the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt."

D. The rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.

Explanation:

It is important to consider that Kenny hikes all day but at a steady pace, whereas Janelle runs very fast. So Kenny's case, the supply of oxygen is sufficient to maintain aerobic respiration within the muscle cells. During this process only CO2, Water, and ATP are produced; therefore, there is no oxygen debt. We should keep in mind that the body shifts to anaerobic metabolism only when the supply of oxygen is limited.

In Janelle's case, running fast would need energy at higher rates and the supply of oxygen would not be sufficient to generate a high amount of ATPs. Therefore, to compensate for this deficiency, cells will start fermenting glucose to lactic acid and produce ATP and maintain energy demands. This lactic acid causes fatigue and this is why Janelle has aching and breathing hard. Breathing hard is also automatic reflux to inhale more oxygen and meet oxygen demands but even breathing hard would not be able to make it and the body will shift to anaerobic respiration automatically.

5 0
3 years ago
Which of these products are made from a renewable resource?
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Renewable resources are those which can be replaced naturally and repeatedly. For example, water, oxygen, and plants are examples of renewable resources.

Wood is a renewable resource as it is a part of trees. Trees are able to be replanted and can be cut down again, once they reach maturity. Plastics, glass, and steel are known as non-renewable resources as they cannot be replaced at a sufficient rate and usually have a limited supply. For example, plastics are created using a variety of different substances such as natural gas and oil (polyethylene). The Earth contains a limited supply of both substances, so plastic is deemed as being non-renewable.

As a result, the only renewable product in the choices provided above is a wooden spoon.

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