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Stells [14]
2 years ago
5

People began measuring intelligence through tests roughly __________ years ago.

Biology
1 answer:
kirill115 [55]2 years ago
7 0
I believe it was around 100 years ago
Hope this helps
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Organs _____.
maksim [4K]

Answer:

perform functions that tissues cannot carry out on their own

Explanation:

In the hierarchy of living system organs come after tissues and before organ systems. Hence, organs are complex then tissues and perform functions that tissues wont be able to perform on their own.

A organ is made up of various types of tissues. They can be divided into two categories, main tissue and sporadic tissue. Main tissue or parenchyma is unique to that organ and defines the function of the organ. For example: Cortex and medulla together form the main functional tissue in kidney. Similarly, myocardium is the main tissue of the heart. Sporadic tissue has blood vessels, nerves and connective tissues.

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Provincetown Spit: How was it formed?
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<span>Wave erosion of headlands formed the Province Spit in Cape Cod</span>
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Eutrophication caused by humans is called? 
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B artificial fertilizer
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Caffeine aids in the movement of calcium ions across cell membranes by both making it easier for the Ca2+ channels to open and b
Llana [10]

Caffeine cause dose dependent prominent increase in force of contraction and period of contraction of muscle

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Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.  However latent period and relaxation period are unaffected by caffeine. Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.

Because of calcium ion release in skeletal muscle, caffeine causes peripheral manifestation such as hyper-reflexia, muscle twitching etc.

High amount of caffeine leads to increase in release of Ca2+ from sarcoplasmic reticulum. It increases tension development in single tetanic contraction and re-initiate maximum tension in fatigue single myofibre by restoring Ca2+ release from sarcoplasmic reticulum to non-fatigued levels.

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3 years ago
What are the cells that are primarily responsible for photosynthesis?
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Answer: thylakoid membrane

Explanation:

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