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sattari [20]
3 years ago
10

What was the history of life on earth recorded in?

Biology
1 answer:
Doss [256]3 years ago
5 0

Answer: living and fossil organisms evolved

Explanation:

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It’s a marine/ sea sponge it is a underwater invertebrate. It is classified as animal . Also Sea sponges do not have cell walls or chloroplast typical of plants, but contain animal cells.
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3 years ago
Which statement about the burden of childhood illness in the under-5 age group is true?
11Alexandr11 [23.1K]

Answer:

b

Explanation:

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3 years ago
When a pigment molecule in a light-harvesting complex absorbs a photon of light, what happens to its excited-state electron?.
MA_775_DIABLO [31]

When a pigment molecule in a light-harvesting complex absorbs a photon of light, While returning to its ground state, the electron transfers some of the energy from its excited state to an electron in a nearby pigment molecule.

  • It takes a photon of light energy some distance before it reaches a pigment molecule like chlorophyll.
  • An electron in the chlorophyll is "activated" by the photon. The energy imparted to the electron then moves from one pigment molecule to another until it reaches the reaction center, a pair of chlorophyll a molecules.
  • An electron in the reaction center is then excited by this energy, causing it to break loose and travel to the primary electron acceptor.
  • Therefore, it is said that the reaction center "donates" one electron to the main electron acceptor.

learn more about light-harvesting complex here:

brainly.com/question/7025086

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8 0
2 years ago
What causes some parts of skin to be more sensitive than others?
Gre4nikov [31]
It depends on the concentration of nerve receptors in different areas of the skin. 
3 0
3 years ago
Which best describes the limits of science?
vichka [17]

A. Science cannot answer philosophical questions. Philosophical questions could be described as rheoretical questions, such as "what is the purpose of life?" These questions' answers can very from person to person. Science answers questions such as "what is the boiling point of water?", or "what is the chemical structure of water? These are both questions that have the same answer, no matter who is asking them. You just have to have the ability to accurately measure and observe the things involved, or in this case, the temperature of the water when it starts to boil or whe different atoms in the water.

Let's examine the other questions.

B. science can answer only mathematical questions. As you saw in the explanation above, science can also answer other questions, as long as they have a definite answer that we can accurately measure.

C.Science can answer any questions. Again, we have already saw that science cannot answer philosophical questions, so science cannot answer any question.

D. Science can answer any difficult questions. As with the example of the chemical stucture of water, we can answer difficult questions with science. This may seem simple to you, but it would be very difficult if it was not already known!


8 0
3 years ago
Read 2 more answers
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