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nlexa [21]
3 years ago
6

A period in the embryonic stage during which certain developments must occur because they will not occur later is called the ___

______ period.
Biology
1 answer:
bija089 [108]3 years ago
6 0
Critical period because they had fully developed their vision
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<span>During each Krebs cycle, eight reactions should occur. As the reactions happen, the energy currency of the cell, adenosine triphosphate, known as ATP, is made.
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Emperor penguins use a huddling behavior to conduct heat efficiently. Similarly, honeybees conduct heat within their hives by hu
olya-2409 [2.1K]
<h2>Emperor penguins</h2>

Explanation:

  • Evaporative and convective is Right answer.
  • Fish and krill make up the main part of their eating routine alongside <em>squid and scavangers.</em> Like other penguin species, <em>Emperor Penguins </em>have an unpleasant and spiky tongue which causes them <em>when attempting to eat tricky fish.  </em>
  • It  is the biggest of 17 types of penguin at 1.15 m (45 in.) tall.
  • It is likewise the main creature to occupy the open ice of Antarctica throughout the winter.  
  • The penguin is the tallest and heaviest of all living penguin species.
  • A gathering of penguins is known as a province, a rookery or a Waddle, yet these terms are for a gathering of penguins ashore.
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8 0
3 years ago
Polar front jet stream
Tanya [424]

The polar jet stream expresses seasonal change. <em>The change in the </em><em>polar  jet stream</em><em> from summer to winter  position causes </em><em>cooler temperatures</em><em> farther south and causes </em><em> storms</em><em> to move more rapidly. Option 4.</em>

<h3 /><h3>Jet Streams</h3>

  • A jet stream is a strong and narrow air stream concentrated along the horizontal axis in the troposphere.

  • The stream wide is about 200 km, and its thickness ranges between 5,000 and 7,000 m.

  • The strongest winds are in the central region of the stream, known as the jet core, with a speed of about 120 km/hour.

<h3>Types</h3><h3 />
  • There are five jet stream types.

  • Two polar streams ⇒ one of them in the northern hemisphere and the other one in the southern hemisphere.

  • Two subtropical streams ⇒ one of them in the northern hemisphere and the other one in the southern hemisphere.

Both of them are west streams. And the polar ones are stronger than the subtropical ones.

  • The tropical stream that comes from the east.  

<h3 /><h3>Polar Jet Stream</h3><h3 />
  • In the northern hemisphere, the polar jet stream affects mainly the Iberian peninsula.

  • It gets formed in the convergence region, where the cooler winds from the Pole and the warmer winds from the Equator meet.

  • This stream surrounds the Earth making several waves on its course.

  • It occurs a seasonal balance between the winter and summer

→ Winter ⇒ The polar jet stream places between 35 and 40º latitude.

→ Summer ⇒ The polar jet stream is placed at about 50º latitude.

Following this seasonal change, from summer to winter cooler air masses reach lower latitudes and might be the cause of severe winter storms.

According to this framework, we can assume that <em>the </em><em>change</em><em> in the </em><em>polar  front jet stream</em><em> from summer position to winter  position causes </em><em>cooler temperatures</em><em> farther </em><em>south </em><em>and causes  </em><em>storms</em><em> to move more rapidly. </em>

The correct option is (4).

-----------------------------------------------------------

You can learn more about the jet streams at

brainly.com/question/12208637

brainly.com/question/861519

5 0
2 years ago
What has a large role in the immune system
alina1380 [7]
The immune system mainly defends the body from any organisms that threaten the destruction of cells...
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3 years ago
Metabolism is the breaking down of complex substances into simpler molecules. (cell respiration)
kirill [66]

Answer: Option C

Explanation:

Metabolism can be defined as the combination of catabolism and anabolism.The combination of simpler compounds to form complex compounds is known as anabolism.

The breaking of complex compounds into simpler compounds is known as catabolism.

The metabolism is not a local effect but is a global effect. It helps in maintaining equilibrium inside the body. It can be in terms of temperature, pH and et cetera.

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