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1 year ago

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Organisms in ____ must be able to avoid being swept away, crushed by waves, or being left high and dry at low tides, and must su

rvive daily or seasonal salinity and temperature changes.

2 answers:

DedPeter [7]1 year ago

8 0

Https://quizlet.com/17718770/chapter-8-aquatic-biodiversity-flash-cards/

AleksandrR [38]1 year ago

6 0

Answer: intertidal zone

Explanation:

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Dry climates often favor the development of great dry grasslands called A) deserts B) forests C) savannas D) tundras

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The answer would be, "C", "Savannas".

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Any of a group of organic compounds that includes sugars, starches, cellulose, and gums and serves as a major energy source in t

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Answer: 1 : 2 : 1

Explanation:

Carbohydrates were originally referred to as 'hydrates of carbon' because they contained hydrogen, oxygen and carbon.

Sugars, starches, cellulose, and gums all belong to the class of carbohydrates.

They are represented by the general formula Cx(H2O)y, where x and y must be whole numbers.

Thus, Carbohydrates contain carbon, hydrogen and oxygen in the ratio 1 : 2 : 1

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2 years ago

Pseudomonas sp. has a mass doubling time of 2.4 h when grown on acetate. The saturation constant using this substrate is 1.3 g/l

erastova [34]

Answer:

a) Cell concentration when the dilution rate is one-half of the maximum is 0.598g cell/L

b) the substrate concentration when the dilution rate is 0.8 $D_{max}$ is 5.2g/l

c) the maximum dilution rate is : 0.41 h⁻¹

d) the cell productivity at 0.8 $D_{max}$ is 2.40g cell/L

Explanation:

Given data :

Mass doubling time of Pseudomonas sp. = 2.4 hr

Saturation constant = 1.3 g/L

Cell yield on acetate = 0.46g cell/g acetate

We are to find;

a. Cell concentration when the dilution rate is one-half of the maximum.

Here, cell yield =amount of cell produced / amount of substrate consumed.

[S] at 0.5D max is determined using the Monod's equation.

Using the formula :

$D = \frac {D_{max}[S] }{ks+[S]}$

, where D is the dilution rate,

[S] is substrate concentration; &

Ks is the saturation constant.

By replacing the values, we get :

$0.5 = \frac{S}{1.3+[S]}$

$\\\0.65=0.5[S]$

[S]=1.3g/L

The cell concentration at 0.5Dmax= cell yield x substrate consumed at 0.5Dmax.

=0.46×1.3

= 0.598g cell/L

b)

Substrate concentration when the dilution rate is 0.8 $D_{max}$ is calculated as:

$D = \frac {D_{max}[S] }{ks+[S]}$

0.8=[S]/1.3+[S]

1.04+0.8[S]=[S]

[S]= 5.2g/L

Therefore , the substrate concentration when the dilution rate is 0.8 $D_{max}$ is 5.2g/l

c)

Maximum dilution rate is calculated using the expression $D_{max} = \frac{1}{time}$

=1/2.4

=0.41 h⁻¹

So, the maximum dilution rate is : 0.41 h⁻¹

d)

The cell productivity at 0.8 $D_{max}$ can be calculated by multiplying the amount of the cell yield with the amount of the substrate consumed at 0.8 $D_{max}$

Cell yield = $\frac {cell \ productivity \ at \ 0.8Dmax}{amount \ of \ substrate\ consumed \at\ 0.8 \D_{max}}$

Cell productivity at 0.8 $D_{max}$ = 0.46 × 5.2

=2.40g cell/L

Therefore, the cell productivity at 0.8 $D_{max}$ is 2.40g cell/L

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2 years ago

Is C4 photosynthesis the photosynthetic process used by some plants to survive in a hot dry climate, like the desert?

Ad libitum [116K]

Yes, C4 is a process used by plants to survive in hot dry climates along with the CAM cycle. Hope this helps!

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1- Bioremedation (When you add a species to an ecosystem its not native to.

2- The competition for resources increased in the ecosystem.

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2 years ago

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