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andriy [413]
3 years ago
8

What characteristic do all organisms in the phylum chordata share?

Biology
1 answer:
Sophie [7]3 years ago
6 0

Answer: Notochord,Nerve cord, pharyngeal gills

Explanation:

1.Presence of notochord that gives them skeletal support this also develops into between Column in vetertebrates.

2.presence of dorsal hollow nerve cord that develops into the brain and spinal cord which is the nervous system. develops into the central nervous system

3.presence of pharyngeal slit that develops into gills in some aquatic organism and its develops into jaw in some mammals. The gills is use for removal of water that enters the mouth while feeding.

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PLEASE HURRY UP WILL GIVE BRAINLISET AND 30 POINTS THIS IS SCIENCE
diamong [38]

(1)

Troposphere – This is the densest layer and where weather events occur

Stratosphere – This is where the ozone layer is found. Some high altitude aircraft cruise in this layer.

Mesosphere – Temperatures drop with altitude in this layer

Thermosphere – This is where most of the meteorites that enter the earth’s atmosphere burn up. This layer takes up most of the Uv and X-rays from the sun. Most satellites orbiting earth are in this layer

Exosphere – almost akin to space due to the thinness of the layer. Molecules in the layer often escape into space

(2)

A ‘pause’ is a transition between the above-mentioned distinct layers. The tropopause, for example, occurs between the troposphere and the stratosphere and the stratopause between the stratosphere and mesosphere and thermopause is found between thermosphere and exosphere.

(3)

A temperature inversion is a rise in temperatures with altitude in a layer in the atmosphere. One layer exhibiting temperature inversion is the stratosphere. This is due to the ozone layer that absorbs UV light. The upper ozone absorbs most of the UV light, than lower ozone, exciting the molecules and making the higher altitudes in the layer to be warmer.

(4)

The ozone layer protects life on earth from the high energy UV radiation from the sun. UV is capable of causing double-stranded break on DNA resulting in genetic mutations on organisms. Most of these would be lethal. The Ozone absorbs most of the UV before it reaches earth's surface. Ozone is formed when an oxygen molecule reacts with another oxygen atom to form an O₃. The oxygen atoms are made from the splitting of an oxygen molecule by UV light.

Learn More:

For more on the atmosphere check out;

brainly.com/question/13633485

brainly.com/question/2846796

#LearnWithBrainly

5 0
3 years ago
Complete the sentence by selecting the correct answer. Darwin's idea of evolution suggested that…
marysya [2.9K]

Answer:

I am 99% the answer is A. Darwin did not discover Archaea, Evolution does NOT happen in a straight line, and variation is totally different than evolution.

Explanation:

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Explanation:

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Why does DNA replication have to occur before cell division? Explain what would happen if it did not occur
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DNA replication needs to occur because existing cells divide to produce new cells. Each cell needs a full instruction manual to operate properly. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!

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Select whether the description is a Bacteria, Archaebacteria, or Protist. Some will have more than one answer.
Rzqust [24]

Answer:

the major difference is that protists are eukaryotes while bacteria and archea are both prokaryotes. this means that prokaryotes do not have a nucleus, and contain circular DNA.

Explanation:

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