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Ilia_Sergeevich [38]
2 years ago
5

What are three ways to determine the age of earth specimens and help prove that the changes on the earth occur over very long pe

riods of time?
Biology
1 answer:
Verizon [17]2 years ago
4 0

Answer:

The decay of potassium to argon, uranium to lead, and one isotope of lead to another are some common yardsticks used to date very old rocks. These dating methods allow scientists to put real ages on rocks with astonishing accuracy.

Explanation:

The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientists calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years.

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vodka [1.7K]

Answer:

on channel-linked receptors, G-protein-linked receptors, and enzyme-linked receptors.

The ability of cells to communicate through chemical signals originated in single cells and was essential for the evolution of multicellular organisms. In multicellular organisms, cells send and receive chemical messages constantly to coordinate the actions of distant organs, tissues, and cells. Cells can receive a message, transfer the information across the plasma membrane, and then produce changes within the cell in response to the message. Single-celled organisms, like yeast and bacteria, communicate with each other to aid in mating and coordination. Cellular communication has developed as a means to communicate with the environment, produce biological changes, and, if necessary, ensure survival.

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2 years ago
What cell organelle does cellular respiration take place in?
gizmo_the_mogwai [7]
Cellular respiration takes place in the mitochondria
3 0
3 years ago
Read 2 more answers
Individual living thing
kolezko [41]

Answer:

Image result for individual living thing

An organism is any individual living thing. It is easy to recognize a living thing, but not so easy to define it. Animals and plants are organisms, obviously. Organisms are a biotic, or living, part of the environment.

3 0
3 years ago
If perfect growing conditions allowed a population of producers to grow and increase in density, which of the following changes
strojnjashka [21]

Answer:

A.

Explanation:

The population of herbivores wouldn't decrease because their food source is being increased. Predators wouldn't leave because more herbivores come to eat the increased number of producers, thus more than likely increasing the number of predators.

6 0
2 years ago
Which molecules are used to produce glucose during the calvin cycle?
Lelechka [254]

Answer:

B. ATP & NADPH

Explanation:

fruits and vegetables are full of energy. Energy in the form of glucose. The energy from sunlight is briefly held in NADPH and ATP, which is needed to drive the formation of sugars such as glucose.

As Melvin Calvin discovered, carbon fixation is the first step of a cycle. The Calvin cycle transfers energy in small, controlled steps. Each step pushes molecules uphill in terms of energy content. Recall that in the electron transport chain, excited electrons lose energy to NADPH and ATP. In the Calvin cycle, NADPH and ATP formed in the light reactions lose their stored chemical energy to build glucose.

8 0
3 years ago
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