How long after a living thing dies is C14 useful for dating

Answers

Answer 1

Answer:

Answer:

"Carbon-14 dating can determine the age of an artifact that is up to 40,000 years old. Living organisms absorb carbon my eating and breathing." Credit to NDT

Explanation:

Mark as brainliest please >_<

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Which process do scientists think provided earth with an oxygen-rich atmosphere?A. spontaneous generation

B. radiometric dating

C. photosynthesis

D. respiration

Answers

Photosynthesis provided the Earth with an oxygen-rich atmosphere.

Does Earth have an oxygen-rich atmosphere?

Earth's surface environments are highlyoxygenated from the atmosphere to the deepest reaches of the oceans, representing a hallmark of an active photosynthetic biosphere. However, the fundamental timescale of the oxygen-rich atmosphere on Earth remains uncertain, particularly for the distant future.

What provides the most oxygen on Earth?

Scientists estimate that 50-80% of the oxygenproduction on Earth comes from the ocean. The majority of this production is from oceanic plankton drifting plants, algae, and some bacteria that can photosynthesize

Learn more about photosynthesis here brainly.com/question/3529377

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C.photosynthesis would be the correct answer

Cell membranes are often called a "fluid mosaic" of lipids and proteins. What is the role of the cell membrane structures? Structurally support the cell Store nutrients for the cell to consume Produce ATP to provide energy for the cell Selectively allow some materials into the cell

Answers

A .Structurally support the cell
B.Store nutrients for the cell to consume
C. Produce ATP to provide energy for the cell
D. Selectively allow some materials into the cell

It would be A

The Cell membrane is like a wall it allows things to pass though regulated.

Hope that helps

Which of the following is NOT a component of the pulmonary circuit? A. right ventricle B. pulmonary arteries C. pulmonary veins D. pulmonary capillaries E. venae cava

Answers

Venaecavais not a component of the pulmonary circuit.

The correct Option is 'E'.

The pulmonary circuit is responsible for carrying oxygen-poor blood from the heart to the lungs for oxygenation and then returning oxygen-rich blood to the heart.

Its main components are the right ventricle, which pumps deoxygenated blood into the pulmonary arteries, which carry it to the lungs. In the lungs, the blood is oxygenated through diffusion in the pulmonary capillaries.

Finally, oxygen-rich blood returns to the heart via the pulmonary veins, not the venae cava, which are part of the systemic circuit, responsible for distributing oxygenated blood to the rest of the body.

The venae cava bring deoxygenated blood from the body to the right atrium, initiating the systemic circulation. So, the venae cava are not part of the pulmonary circuit.

To learn more about Venaecava.

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Explain how producers, consumers, and decomposers obtain the energy they need.

Answers

Answer:

Producers obtain energy from sunlight, consumers obtain energy from producers, and decomposers obtain their energy from dead living beings.

Explanation:

Producers produce their food by themselves as they are autotrophic. They obtain mostly their food and energy from the light energy comes from the sun, by the process of photosynthesis.

Consumers are depending on producers for their energy and food. They get energy from producers they eat as food and convert energy from it.

Decomposers get their food or energy by decaying dead living beings or other organic matter. They change these organic matter to energy.

Producers get the energy they need from the sun. Consumers get their energy from the plants and animals that they eat. Decomposers get energy from eating dead plants and animals.

How many atoms of nitrogen are in a chemical formula Ni(NO3)2?O 3
O 2
O 1
O 6

Answers

The answer is 2 because its the outside number and not in the parentheses

Answer:

just did test

Explanation:

Dead animals and plants and wastes

Answers

An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.

POND
ROCKS
MOUNTAINS
DEAD ANIMALS PLANTS AND WASTES ARE NOW ABIOTIC FACTORS

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