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Rus_ich [418]
3 years ago
11

Which describes the correct order of the geologic time scale, from oldest to most recent?

Biology
2 answers:
babunello [35]3 years ago
7 0

Answer:

a

Explanation:

edge

Sedbober [7]3 years ago
3 0
The correct answer is D. Precambrian Time - Paleozoic Era - Mesozoic Era - Cenozoic Era. This is the correct order of the geologic time scale, from oldest to most recent. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 
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What moves through the community from one trophic level to another as organisms feed on one another?
TEA [102]

Energy moves from one trophic level to another as organisms feed on one another.

Explanation:

Energy flows from one trophic level to another in a food chain. according to the ten percent law, only ten percent of the total energy passes onto the next trophic level. While studying the energy flow model two aspects should be taken under consideration. Firstly, the flow of energy is unidirectional and passes on from autotrophs to primary consumer and then secontary, tertiary so on. Secondly the amount of energy decreases at succesive trophic level.

6 0
3 years ago
Dr. Brantz wants to use neuroimaging to detect which part of the brain is active when a person is lying. He asks half his partic
Katyanochek1 [597]

Dr. Brantz wants to test the part of the brain which is active while lying. For this purpose, he will need to make use of the fMRI (functional magnetic resonance imaging) technique. This technique is used for measuring the brain activity by the means of the detecting changes in the blood flow. The neural activation affects the cerebral blood flow, and this change can be noticed using fMRI.

Hence, the answer is 'fMRI'.

5 0
2 years ago
BabyGrl32 Answer quick pls
guapka [62]

Answer:

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Explanation:

6 0
2 years ago
Place the following events of muscle excitation in the correct order.
svetlana [45]

An motion potential in the presynaptic cell activates calcium channels. Ca+ triggers the discharge of Acetylcholine through exocytosis. Ach binds its receptors in the postsynaptic membrane, opening Na+ channels. The Order is 4, 3, 5, 1, 2.

The principal frightened system generates an motion potential that travels to the goal activating the calcium channels ⇒ event (4)

Calcium triggers vesicles fusion to the presynaptic membrane. By exocytosis, vesicles release the neurotransmitter -Acetylcholine- into the synaptic space ⇒ event (3)

Once there, Ach binds to its receptors on the postsynaptic membrane of the skeletal muscle fiber, causing ion channels to open ⇒ event (5)

Positively charged sodium ions move the membrane to get into the muscle fiber (sarcoplasm) and potassium leaves the cell ⇒ event (1)

The distinction in charges, resulting from these ions' transport, positively charges the fiber membrane. The postsynaptic cell depolarizes ⇒ Event (2)

The motion potential enters the t-tubules depolarizing the internal part of the muscle fiber. Contraction initiates while the motion potential depolarizes the internal part of the muscle fiber. Calcium channels spark off in the T tubules membrane, releasing calcium into the sarcolemma.

At this point, the muscle is at rest, and the tropomyosin is inhibiting the appeal strengths between myosin and actin filaments. Tropomyosin is obstructing binding sites for myosin on the skinny filament.

When calcium enters the sarcolemma, it binds to troponin C, and troponin T alters the tropomyosin role through shifting it and unblocking the binding sites.

Myosin heads be a part of the uncovered actin-binding points forming move-bridges, and whilst doing so, ATP turns into ADP and inorganic phosphate, that's released.

Myofilaments slide impulsed through chemical energy accumulated in myosin heads, generating a strength stroke. The strength stroke initiates while the myosin move-bridge binds to actin. As they slide, ADP molecules are released. A new ATP hyperlinks to myosin heads and breaks the bindings to the actin filament.

Then ATP splits into ADP and phosphate, and the energy produced is gathered in the myosin heads, which begins offevolved a new binding cycle to actin.

Finally, Z-bands are pulled towards every other, and the sarcomere and the I-band get shorter, generating muscle fiber contraction.

According to those steps, the appropriate order of activities is 4, 3, 5, 1, 2.

To learn more about Acetylcholine, click here:

brainly.com/question/13821381

#SPJ4

7 0
9 months ago
Which planet has a surface that is almost entirely covered in liquid water? A. Mars B. Earth C. Mercury D. Venus
qwelly [4]
This is obvious but the correct answer is B. Earth

HOPE I HELPED


6 0
3 years ago
Read 2 more answers
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