The "dead zone" in the Gulf of Mexico is:_______.

Biology

1 answer:

ANEK [815]3 years ago

5 0

Answer:

Explanation:

Dead zones are are areas of low oxygen or hypoxia. They are usually caused by nutrient pollution that leads to algae blooms, but there are other factors that contribute

Hope this helps :)

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The lock-and-key mechanism refers to a) the complementary shapes of an enzyme and a substrate. b) the attractive forces between

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Answer:

A. The complementary shapes of an enzyme and a substrate

Explanation:

The Lock-and-Key model was made to show how an enzyme's active zone fits a substrate and how they bond together. It correlates just like a lock and a key; you have to have the correct-shaped key in order to open a lock. Same process of thought with the enzymes; you must have the same shape for both in order to bind together,

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What is the discussion for animal tissues experiment?

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Three lots with parallel side boundaries extend from the avenue to the boulevard as shown in the diagram attached.

Given;
x + y + z = 140 meters

According to the proportion theorem,

$\frac{x}{40} = \frac{y}{30}$

Solving for x, using cross multiplication:

$\frac{x}{1} = \frac{40y}{30}$

Similarly,

x/40 = z/35

solving for z by cross multiplication,

z = 35x/40
z = 7x/8

Now, the third proportions,
y/30 = z/35

Solving for y,

y = 30z/35
y = 6z/7

x + y + z = 140

4y/3 + 6z/7 + 7x/8 = 140

(224y + 144z + 147x)/168 = 140

224y + 144z + 147x = 23520

Substitutoing z = 7x/8,

224y + (144 × 7x/8) + 147x = 23520

224y + 126x + 147x = 23520

224y + 273x = 23520
Now,
Substitute y = 3x/4

(224×3x/4) + 273x = 23520

168x + 273x = 23520

441x = 23520

x = 53.33

Now,
We know that
y = 3x/4
so,
y = 40

And,
z = 7x/8
Z = 46.66

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The role of a catalyst in a chemical reaction is to

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B. By lowering the energy need for the reaction, you increase the reaction speed or the rate.

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Which one of the following statements is true of enzyme catalysts? A) Their catalytic activity is independent of pH. B) They are

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Answer:

D) They can increase the reaction rate for a given reaction by a thousand-fold or more.

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Enzymes are like catalysts with the only difference that they are bio-molecules. Biochemical/chemical reactions are slow because of 'transition state barriers' which require a lot of energy to overcome so enzymes rather than overcoming transition state barrier provide an alternate pathway for biochemical reactions which require comparatively less energy. Thus presence of an enzyme leads to an increase in reaction rate because alternate pathway which requires less energy makes the rate of chemical reaction rapid by a thousand-fold or more.

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