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yan [13]
3 years ago
7

I need help on two of these please i give 20 points

Biology
2 answers:
Rzqust [24]3 years ago
5 0

Answer: 13-d :D

Explanation: A diaphragm allows different amounts of light to pass through the slide.

lorasvet [3.4K]3 years ago
4 0
Number 14 is objective lens
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~

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Xylem ————————————————
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The lock an key analogy is used because each enzyme has specific substrates that fit into it. This is like how locks only work with a specific key. The enzyme is the lock and the substrates are the key.
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This analogy is not perfect because there are often multiple substrates for each enzyme reaction. It only takes one key to turn the lock. The reaction is also taking place between the substrates themselves and not the enzyme. In the lock and key analogy, the lock is affected by the key, but in an enzyme reaction, the substrates are affected by the enzyme.
Hope I’ve helped ;)
6 0
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