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Papessa [141]
3 years ago
13

3. What type of bond holds the backbone together? A. Covalent B. Hydrogen C. lonic

Biology
1 answer:
ohaa [14]3 years ago
6 0

Answer: The answer is B

Explanation:

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Human blood cells have a salt concentration of about 0.9%. A patient's blood cell
soldier1979 [14.2K]

Answer: Saline

Explanation:

8 0
4 years ago
A fertilizer producer finds that it can sell its product at a price of dollars per unit when it produces units of fertilizer. Th
Vilka [71]

Answer:

700

Explanation:

If from the question the price per unit of fertilizer, p(x) = 300 - 0.1x

The cost of x units of  fertilizer = C(x) = 15000 + 125x + 0.025x^2

And we know that Profit = Revenue - Cost

Revenue for x units of fertilizer R(X) = x*p(x)

= 300x - 0.1x^2

Hence Profit: P(x) = R(x) - C(x)

= [300x - 0.1x^2] - [15000 + 125x + 0.025x^2]  

= -0.125x^2 + 175x - 15000

To determine critical values

P'(x) = -0.25x + 175 = 0

Thus x = 175/0.25

x = 700

To maximize profit, the manufactures must produce 700 units of fertilizers

5 0
3 years ago
Which culturing method proivded the clearest results, the semisolid medium tube or the soft agar plate?
sattari [20]
The answer to this question would be soft agar plate.

The semisolid medium tube is mostly used for containing the specimen. It is hard to examine semisolid medium since the bacteria can grow in the upper part, middle part or even the lower part of the medium. In agar plate, the bacteria always growth in the upper part so it is easier to count the bacteria.
But semisolid can give some more information in determining whether the bacteria is anaerobic by looking for bubble inside the medium. Anaerobic bacteria can do fermentation that will produce air.
5 0
3 years ago
Which statements describe the structure of each type of macromolecule?
klasskru [66]
I think the correct answer from the choices listed above is option A. The statement that describe the structure of each type of macromolecule would be that the <span>building blocks of carbohydrates are sugars that are made of carbon, hydrogen, and oxygen. Hope this answers the question. Have a nice day.</span>
8 0
4 years ago
Read 2 more answers
Give one common characteristic of hardwood trees
ohaa [14]

Hardwood trees have a lot of bark.

(I hope this is good enough.)

3 0
3 years ago
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