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3 years ago

The movements of energy and nutrients through living systems are different because

Biology

2 answers:

skelet666 [1.2K]3 years ago

8 0

It is different because it depends on where the systems it came from, and which type of systems they are.

mel-nik [20]3 years ago

3 0

1. A

2. D

3. C

4. C

100% Correct

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Help! on biology...........

murzikaleks [220]

Answer:

55 degrees as an acute angle

Explanation:

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3 years ago

Read 2 more answers

8. A narrow region between two air masses of different densities is a A. ridge. B. system. C. gulley. D. front.

Helga [31]

<span>The answer is d. front. A front is the narrow region between two air masses of different densities. The interaction of the air masses cause the mass that is less dense to rise. Once air rises it cools and condenses to form clouds and eventually leads to precipitation. Using cold fronts as an example, the denser mass of cold air forces the lighter warm air to rise. </span>

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3 years ago

A grad student has a culture of E. coli with a total volume of 1,800 mL, and OD reading at 550 nm of 1.7. He transfers 1 mL cult

Naily [24]

Answer:

Explanation:

We'll represent the dilution as the volume transferred/total volume in the tube after transfer. So for the first dilution, 1 ml of culture was added into 9ml of broth bringing the total volume to 10 ml i.e 1/10

For the second dilution, 0.1 mL was added to 0.9mL of broth bringing the total volume to 1mL i.e 0.1/1.0 (this is also the same as 1/10). In relation to the stock culture, this is represented as 1/100 (that is 1/10 (first dilution) * 1/10 (second dilution)

Giving that the same was done for dilution 3 and 4,

third dilution is represented as: 1/10 and the fourth as 1/10 as well

In relation to the stock, dilution 3 is 1/1000

dilution 4 is 1/10000

a. the dilution in the third tube is $\frac{1}{1000} = 10^{3$ or 1.0* $10^{3}$

b. the dilution spread onto the agar plate is the fourth dilution, that is, $\frac{1}{10000} = 10^{4}$ or $1.0*10^{4}$

c. Since the grad student got 386CFU/0.2mL (200 uL = 0.2mL),

the cells in 1mL is: 386/0.2 = 1930 = 1.93 * $10^{3}$

the cells in 1800mL is therefore 1930*1800 = 3,474,000 = 3.4*10 $10^{6}$

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3 years ago

Your study partner is frustrated with the confusing nomenclature in your textbook. "This is too picky!" he says, "Let’s just cal

wlad13 [49]

Answer:

Options B and C

Explanation:

Living things can be divided into three domains: archaea, bacteria and eukarya

The domain "eukarya" includes kingdom fungi, plantae, and animalia

A Fungus is any member of the kingdom Fungi. Fungi are eukaryotic organisms typically having chitin cell walls but no chlorophyll or plastids. Fungi may be unicellular or multicellular. Examples of fungi are mushroom, yeast, mucor etc

Plants are multicellular eukaryotic organisms that have double-membraned chloroplasts in its cells containing chlorophyll.

Animals are multicellular organisms that is usually mobile, whose cells are not encased in a rigid cell wall (distinguishing it from plants and fungi) and which derives energy solely from the consumption of other organisms (distinguishing it from plants).

8 0

3 years ago

Karyokinesis only occurs in what kind of cell ?

algol13

In the nucleus, the part on the cell that contains all the genome

4 0

3 years ago