If you have an 81 for your 9 weeks grade but make a 70 on your exam whats going to be your final grade?

Answers

Answer 1

Answer: man you need to change this to a different catagory

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which of the following factors is most likely a density independent regulartor Of Population Growth Of Poison Dart Frogs In The Rainforest

Answers

Maybe some type of natural disaster?

Clear cutting of a rain forest.

Your Welcome! :D

In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions.a. acids
b. enzymes
c. products
d. substrates

Answers

Answer:

b. enzymes

Explanation:

For any reaction to happen, an energy barrier must be crossed first. This is called as activation energy. Enzymes are biological catalysts that lower the activation energy for a reaction. As a result the reaction is started sooner and its rate is fast.

The substrate binds to the active site of enzyme to form a substrate-enzyme complex. The reaction takes place and product is formed also releasing the enzyme back so that it can be used again.

The answers would be B.
Enzymes accelerate or catalyze ( slow or stop) chemical reactions. And enzymes are protein molecules.
While A, C, and D are not.

You dilute your bacteriophage for plating 10^-6. You mix 0.1ml of the bacteriophage dilution with 0.3ml of bacteria and plate with top agar. The next day you count your plaques. You get 46 pfu at this dilution. What is the final concentration (pfu/ml) of the phage stock?

Answers

Answer:

$46 * 10^7$ pfu/ml

Explanation:

Given -

Bacteriophage dilution $= 0.1$ ml

Volume of bacteria and plate with top agar $= 0.3$ ml

Number of plaques $= 46$ pfu

Dilution (d) $= 10^(-6)$

Final concentration of phage stock is equal to

$= (pfu)/(d*v)$

Where pfu is the count of plaques

d is the dilution and v is the volume

Substituting the given values, we get -

$(46)/(10^(-6) * 10^(-1)) \n= 46 * 10^7$ pfu/ml

What are the potential effects of a supercell thunderstorm? Select all that apply.A. hail
B. wind
C. lightning
D. tornadoes
E. hurricanes
F. squall lines