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maw [93]
3 years ago
10

Which one of these compound machines does NOT have a wheel and axle? A. bicycle B. zipper C. wheelbarrow D. tape dispenser

Biology
2 answers:
Zigmanuir [339]3 years ago
7 0
Hello!

If you look at a zipper, you'll see that it doesn't have a wheel or an axle. A zipper links the <span>protruding teeth that the zip contains. Your answer would be B!

You can feel free to let me know if you have any questions regarding this!
Thanks!

- TetraFish</span>
Blababa [14]3 years ago
3 0
Zipper, because it's two inclined planes that form into wedges rather than being a wheel and axle.
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The Golgi apparatus is the site of post-translational modification of the secreted proteins like ubiquitination, acetylation, phosphorylation and many others.

Thus, the Golgi apparatus is the correct answer.

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iVinArrow [24]

The given statement is TRUE.

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What is a positive feedback loop?

In nature, a positive feedback loop happens when the outcome of a reaction increases that reaction. A positive feedback loop pushes a system further away from the equilibrium goal if we consider a system in homeostasis. It takes place when something needs to happen quickly and does this by enhancing the effects of a product or event.

<u>Example</u> : Ripening of fruit

In nature, there is a strange phenomenon when a tree or bush may suddenly and silently begin to ripen all of its fruit or veggies. This is the first instance of a beneficial biological feedback loop we've found. If we see an apple tree with many apples, they all appear to ripen over night, going from being unripe to ripe to overripe. The first apple to ripen will mark the start of this. It releases ethylene (C2H4) via its skin when it is ripe. The apples nearby ripen as a result of being exposed to this gas. As soon as they are ripe, they too begin to generate ethylene, which continues to ripen the rest of the tree in a manner akin to a wave.

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8 0
1 year ago
Fun facts about the endocrine system? Any ideas
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Answer:

... does this help ?....

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