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3 years ago

What is the main difference between primary and secondary succession? Plz help!

Biology

1 answer:

Flauer [41]3 years ago

7 0

The difference is primary happens naturally and the secondary responds to an disturbance.

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A unicellular, prokaryotic organism is discovered by scientists Are these characteristics enough to place it in a domain, or is

scoundrel [369]

Hello!

The correct answer is A, more information is needed, because organisms from both the bacteria and archaea domains are prokaryotic and unicellular.

I hope I helped!

6 0

3 years ago

Read 2 more answers

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 $10^{6}$

3 0

3 years ago

Anything in an organism's environment that causes it to react is called a ___. Is it a home or stimulus?

zzz [600]

<span>Anything in an organism's environment that causes it to react is called a STIMULUS. A stimulus is defined as an impulse that evokes a specific functional response from an organism. In living organisms, stimulus can occur both internally and externally. Stimulus generate appropriate response in living organisms. Thus, the correct option is C.</span>

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3 years ago

Why is the net production of ATP from palmitate 106 ATP and not 108 ATP?

MariettaO [177]

Answer:

D. because 2 ATP are lost due to the production of by β oxidation inside a mitochondrion

Explanation:Two ATPs were borrowed from the Nets 4 ATPs produced in glycolysis, for the substrate level phosphorylation in the initial stage of glycolysis for pyruvate productions.

Therefore, the total ATPs would have been 108ATPs, produced as net ATPs, during kerb’s cycle, and oxidative phosphorylation. But because 2ATPs has been spent in substrate phosphorylation then the ATPs produces is 106ATPs

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3 years ago

Why does the function of the hormone oxytocin in the progression of labor during childbirth illustrate a positive feedback mecha

lesantik [10]

Okay. First of all lets discuss what is meant by a positive feed back mechanism. In simplistic terms, this is where the process of adding something will increase what is already happening. So what does Oxytocin do? Well if you are a woman in labor, you are experiencing a lot of pain because the walls of the uterus are contracting (essentially squeezing the baby out). Oxytocin plays the role of simulating more contractions and therefore by make more contractions more Oxytocin is released! its a continual cycle of increasing contractions and increasing the hormone levels to help push out the baby.
Does that make sense? <span />

8 0

3 years ago