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telo118 [61]
3 years ago
10

The difference between protostomes and deuterostomes is _____. protostomes have only an ectoderm and endoderm protostomes have o

nly a mesoderm protostomes develop a mouth first and then an anus protostomes develop an anus first and then a mouth
Biology
1 answer:
vladimir1956 [14]3 years ago
5 0
Protostomes develop a mouth first followed by the anus. Deuterostomes are the opposite.
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What were the two driving forces that drove the evolution in the variation of skin color
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Answer:

The correct answer is: geography and UV radiation.

Explanation:

Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.

The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).

Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.

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Why is it important to study the theory of plate tectonics and continental drift?
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It is practical knowledge in the sense that we know why some parts of the world are inherently risky to live in. Even though volcanic eruptionis, earthquakes and tsunamis are difficult to predict, it makes sense to have building codes and emergency plans that take this into account.

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Even if you will never use or apply this knowledge, knowing about the theory of plate tectonics gives you a current scientific perspective on what we know about the natural world.

It is a good example of how scientific theories proceed by trying to fit several observations into a coherent explanation.

Learning about the observations that needed to be made and explained for the theory to win over scientists helps caution you against people who adopt belief systems without questioning the myths told to them, or those who try to profit from ignorance of how nature actually works.

When it is well taught, it should convince you that, like any scientific theory, plate tectonics is a “work in progress”. New discoveries continue to be made, and it takes creative and logical thinking, debate and a quest for more observations in order to determine which ones prove or challenge the current theory and which ones may lead to its refinement.
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slavikrds [6]

Answer:

F

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Some plants follow C3 pathway while some follow C4 pathway

7 0
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These crops offer several benefits both farmers and consumers.

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Pocket K No. 2: Plant Products of Biotechnology.

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Luba_88 [7]

Answer:

nitrogen fixation is the answer

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